Department: Mathemtices Department

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Kidane Koyas Tola

Full Name:

Kidane Koyas Tola (PhD)

Academic Rank:

Associate Professor of Mathematics

College/Institute:

College of Natural Sciences

Department/Team:

Mathematics

Contact address:

P. O. Box:

Office Tel.:

Cell Phone:+251935147197

Fax:

E-mail Address:kidanekoyas@yahoo.com

Field of Specialization:

Non-linear Functional Analysis (Fixed point theory).

Research Interest:

Non-linear analysis, fixed point theory and its applications.

 

List of Publications

  1. A common fixed point of two selfmaps satisfying generalized (ψ, ϕ)-weakly contractive condition of Integral type where ϕ is non-decreasing (not necessarily continuous or lower semi-continuous), (jointly with K. P. R. Sastry and G. V. R. Babu), International Journal of Mathematical Sciences and Engineering Applications, (IJMSEA) ISSN 0973-9424, Vol. 6 No. V (September, 2012).
  2. A common fixed point of generalized (ψ, ϕ)-weakly contractive maps where ϕ is non-decreasing (not necessarily continuous or lower semi-continuous), (jointly with K. P. R. Sastry and G. V. R. Babu), Advances in Fixed Point Theory, Vol. 2, No 2 (2012), 203-223.

  3. 3. Common fixed point theorems for two pairs of selfmaps satisfying generalized weakly

  4. contractive condition, (jointly with G. V. R. Babu), Journal of Nonlinear Analysis and

  5. Optimization, Vol. 4, No. 1, (2013), 1328.

  1. Fixed points of almost generalized α-ψ contractive maps, (jointly with G. V. R. Babu), International Journal of Mathematics and Scientific Computing, (ISSN: 2231-5330), 3(1), 1, 2013.
  2. A Fixed Point Theorem in Orbitally Complete Partially Ordered Metric Spaces, (jointly with G. V. R. Babu and P.D. Sailaja), Journal of Operators, 2013(2013), Article ID 40573, 8 Pages.
  3. Coupled Coincidence Point Theorems for Nonlinear Contraction Maps under an (F, g) – Invariant setwithout Mixed Monotone Property, (jointly with G. V. R. Babu), Journal of Advanced Research in Pure Mathematics, 6, 2014, 13-23.
  4. A Common Fixed Point Theorem for Generalized-Weakly Contractive Mappings in Multiplicative Metric Spaces, (jointly with AlemayehuGebre &

AynalemGirma ), Advances in the Theory of Nonlinear Analysis and its Applications,

4 (2020), No. 1, 1–13.https://doi.org/10.31197/atnaa.573903.

  1. New Fixed Point Theorem in Dislocated Quasi Metric Space, (jointly with AynalemGirma and KefyalewHailu), Journal Nonlinear Analysis and Application ,Volume 2018, Issue 2, Year 2018, 117-123, Article ID jnaa-00420, 7 Pages.
  2. A fixed point theorem for generalized weakly contractive mappings inb-metric spaces, (jointly with EliyasKedir&AynalemGirma ), Open J.Math. Sci. 2020, 4, 1-8.
  3. Fixed Point and Common Fixed Point Results in Dislocated Quasi Metric Spaces,

(jointly with AynalemGirma ), Ethiop. J. Educ. & Sc. 14(2), 2019, 89-101.

  1. Common fixed point theorems involving contractive conditions of rational type in dislocated quasi metric spaces, ( jointly with YeshimabetJira&AynalemGirma),

Adv. Fixed Point Theory, 8 (2018), No. 2, 341-366.

  1. A coupled fixed point theorem for maps satisfying rational type contractive condition in dislocated quasi b-metric space (jointly with MesaudTesfayeand Solomon Gebregiorgis),

Open J. Math. Sci. 2020, 4, 27-33.

  1. Coupled coincidence and coupled common fixed point theorem in dislocated quasi metric space (Jointly with MitikuDameneand SolomonGebregiorgis),Eng.Sci.Lett.2020,3(4),11-18, doi:10.30538.
  2. Coupled coincidence and coupled common fixed points ofa pair for mappings satisfying a weakly contraction typeT-coupling in the context of quasi -metric spaceJointly with Solomon Gebregigorgis), Open J. Math. Sci. 2020, 4, 369-376; doi:10.30538.
  3. Common fixed point results of s–a contraction for a pair ofmaps in b-dislocated metric spaces (Jointly with Abidsa and Solomon Gebregigorgis), Open J. Math. Anal. 2020, 4(2), 142-151; doi:10.30538/psrp-oma2020.0073.
  4. Some coupled coincidence and coupled common fixed point result in dislocated quasi b-metric spaces for rational type contraction mappings (Jointly with MesaudTesfaye, Kidane Koyas∗, Solomon Gebregiorgis), Int. J. Nonlinear Anal. Appl. 13 (2022) No. 1, 573-582 ISSN: 2008-6822 (electronic) http://dx.doi.org/10.22075/ijnaa.2020.21543.2270.
  5. Alpha-F-Convex Contraction Mappings in b-Metric Space and a Related Fixed Point Theorem (Jointly with KitilaWirtu and Solomon Gebregirgis), HindawJournal of Function Spaces

Volume 2021, Article ID 5720558, 7 pages https://doi.org/10.1155/2021/5720558.

  1. Fixed Point Results for an Almost Generalized α-Admissible Z-Contractionin the Setting of Partially Ordered b-Metric Spaces (Jointly with Solomon Gebregigorgis), Hindawi

Abstract and Applied AnalysisVolume 2021, Article ID 5988007, 11 pages

https://doi.org/10.1155/2021/5988007.

Hailu Muleta Chemeda

Full Name: Hailu Muleta Chemeda

Nationality: Ethiopian

Academic Rank: Assistant professor

College/institute: College of Natural Sciences

Department: Mathematics

Field of specialization: Numerical Analysis

Research interest: Numerical Linear Algebra, Numerical Solutions of Ordinary and Partial Differential Equations

Publications:

  1. Merga, F.E., Chemeda, H.M. Modified Crank–Nicolson Scheme with Richardson Extrapolation for One-Dimensional Heat Equation. Iran J Sci Technol Trans Sci 45(5), 1725–1734 (2021). https://doi.org/10.1007/s40995-021-01141-0

  2. Kedir Aliyi, Hailu Muleta (2021). Numerical Method of Line for Solving One Dimensional Initial- Boundary Singularly Perturbed Burger Equation. Indian Journal of Advanced Mathematics (IJAM) ISSN: 2582-8932, 1(2).

https://doi.org/10.35940/ijam.B1103.101221

  1. Kedir Aliy, Alemayehu Shiferaw, Hailu Muleta (2021). Radial Basis Functions Based Differential Quadrature Method for One Dimensional Heat Equation. American Journal of Mathematical and Computer Modelling, 6(2): 35-42; https://doi.org/10.11648/j.ajmcm.20210602.12

  2. Amrach Sebro, Hailu Muleta, Solomon Gebregiorgis (2020). Extrapolated Refinement of Generalized Gauss- Seidel Scheme for Solving System of Linear Equations. BIRJSH, 4(1), 12-23; available online at http://www.journals.dbu.edu.et/

  3. Solomon Gebregiorgis and Hailu Muleta (2020). A Seven-Step Block Multistep Method for the Solution of First Order Stiff Differential Equations. Momona Ethiopian Journal of Science (MEJS), 12(1):72-82; http://dx.doi.org/10.4314/mejs.v12i1

  4. Firew Hailu, Genanew Gofe Gonfa and Hailu Muleta Chemeda (2020). Second Degree Generalized Successive Over Relaxation Method for Solving System of Linear Equations. Momona Ethiopian Journal of Science (MEJS), 12(1):60-71; http://dx.doi.org/10.4314/mejs.v12i1.

  5. AddisuYitbarek, Genanew Gofe and HailuMuleta (2016). Acceleration of Newton-Raphson’s Method Using Logarithmic Convexity for Solving Systems of Nonlinear Equation of Two variables. Applied Mathematics.volume 95:41153-41158; available online at www.elixirpublishers.com

  6. Hailu Muleta and Genanew Gofe (2018). Refinement of Generalized Accelerated Over Relaxation Method for Solving System of Linear Equation Based on the Nekrassov-Mehmke 1-Method. Ethiop.J.Educ. &Sc. 13(2), 1-18; http://www.ethiopia_ed.net, http://www.ju.edu.et/ejesc

http://www.ajol.info/index.php/ejesc(orajol/ejesc)

  1. HailuMuleta and HabtamuGaroma (2016).

Assessment of Grade 10 Students’ Performance in Mathematics: The Case of

Jimma Zone. International Journal of Current Research 8(09), 38620-38628;

http://www.journalcra.com

  1. Habtamu Garoma and HailuMuleta (2016).

Assessment of Jimma Zone Grade 10 Students’ Extrinsic Motivations towards

Mathematics International Journal of Current Research 8(09), 38756-38770;

http://www.journalcra.com

Contact Address:

Email: muetah@gmail.com; hailu.muleta@ju.edu.et

Tel: +251(09)46251887

Skype: +2510946251887

Fax: 0471112214

P.O. Box: 378, Jimma University Main Campus

 

Gemedi Roba Kusi

  • Title: Mr.
  • Full Name:  Gemedi Roba Kusi
  • Nationality: Ethiopian
  • Academic Rank: Lecturer
  • College/institute: College of Natural Sciences
  • Department: Mathematics
  • Field of specialization: Numerical Analysis
  • Research interest: Numerical Solution of Parabolic Partial Differential Equations.
  • Publications:
  1. Fifth Order Predictor-Corrector Method for Quadratic Riccati Differential Equations
  2. Quartic Non-polynomial Spline Method for Singularly Perturbed Differential difference Equation with Two Parameters

Contact Address:

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Gemechis File Duressa

T itle: Prof. Dr.

Full Name:  Gemechis File Duressa

Nationality: Ethiopian

Academic Rank: Professor

College/institute: College of Natural Sciences

Department: Mathematics

Field of specialization: Mathematics (Numerical Analysis)

Research interest: Broadly focuses on Numerical Solution of Differential Difference Equations with Delay as well as Advance; Finite Difference Methods, Finite Element Methods, Fitted Operator and Fitted Mesh Methods for Solving Singularly Perturbed Boundary Value Problem in ODE’s and PDE’s; and Leadership in Higher Education

Publications:

  1. Deressa CT, Duressa GF, Investigation of the dynamics of COVID-19 with SEIHR nonsingular and nonlocal kernel fractional model. International Journal of Modelling and Simulation. 2021 Dec 27:1-20.  DOI: 10.1080/02286203.2021.2012636 

  2. Wakjira Tolassa Gobena and Gemechis File Duressa, Parameter-uniform numerical scheme for singularly perturbed delay parabolic reaction diffusion equations with integral boundary condition. International Journal of Differential Equations. Volume 2021, Article ID 9993644, 16 pages; https://doi.org/10.1155/2021/9993644.

  3. Masho Jima Kabeto and Gemechis File Duressa, Accelerated nonstandard finite difference method for singularly perturbed Burger‑Huxley equations. BMC Research Notes. 14(2021)446; https://doi.org/10.1186/s13104-021-05858-4.

  4. Tesfaye Aga Bullo, Guy Aymard Degla and Gemechis File Duressa, Fitted mesh method for singularly perturbed parabolic problems with an interior layer. Mathematics and Computers in Simulation. 193 (2022) 371–384. https://doi.org/10.1016/j.matcom.2021.10.029.

  5. Gemechis File Duressa and Habtamu Garoma Debela, Numerical solution of singularly perturbed differential-difference equations with mixed parameters. Journal of Mathematical Modeling. 9(4) (2021) 691-705.; DOI: 10.22124/jmm.2021.18365.1576.

  6. Mesfin Mekuria Woldaregay and Gemechis File Duressa, Uniformly Convergent Numerical Scheme for Singularly Perturbed Parabolic PDEs with Shift Parameters. Mathematical Problems in Engineering. Volume 2021, (2021) Article ID 6637661, 15 pages; https://doi.org/10.1155/2021/6637661.

  7. Mesfin Mekuria Woldaregay and Gemechis File Duressa, Uniformly convergent numerical scheme for singularly perturbed parabolic delay differential equations. J. Appl. Math. & Informatics. 39(5-6) (2021) 623-641; https://doi.org/10.14317/jami.2021.623.

  8. Imiru Takele Daba, Gemechis File Duressa, Uniformly convergent numerical scheme for a singularly perturbed differential-difference equation arising in computational neuroscience. J. Appl. Math. & Informatics. 39(5-6) (2021) 655 – 676; https://doi.org/10.14317/jami.2021.655.

  9. Worku Tilahun Anilay, Gemechis File Duressa and Mesfin Mekuria Woldaregay, Higher order uniformly convergent numerical scheme for singularly perturbed reaction-diffusion problems, KYUNGPOOK Math. J. 61(2021), 591-612; https://doi.org/10.5666/KMJ.2021.61.3.591.

  10. Habtamu Garoma Debela and Gemechis File Duressa, Uniformly convergent non-polynomial spline method for singularly perturbed robin-type boundary value problems with discontinuous source term, Abstract and Applied Analysis, Volume 2021, Article ID 7569209, 12 pages; https://doi.org/10.1155/2021/7569209.

  11. Tesfaye Aga Bullo, Guy Aymard Degla and Gemechis File Duressa, A parameter-uniform finite difference scheme for singularly perturbed parabolic problem with two small parameters, European Journal of Computational Mechanics, Vol. 30, 2–3(2021) 197–222; https://doi: 10.13052/ejcm2642-2085.30233.

  12. Mesfin Mekuria Woldaregay and Gemechis File Duressa, Accurate numerical scheme for singularly perturbed parabolic delay differential equation, BMC Research Notes, (2021) 14:358; https://doi.org/10.1186/s13104-021-05769-4.

  13. Imiru Takele Daba and Gemechis File Duressa, Collocation method using artificial viscosity for time dependent singularly perturbed differential-difference equations, Mathematics and Computers in Simulation, 192 (2022) 201–220;

https://doi.org/10.1016/j.matcom.2021.09.005.

  1. Mesfin Mekuria Woldaregay and Gemechis File Duressa, Uniformly convergent hybrid numerical method for singularly perturbed delay convection-diffusion problems, International Journal of Differential Equations, Volume 2021, Article ID 6654495, 20 pages; https://doi.org/10.1155/2021/6654495.

  2. Mesfin Mekuria Woldaregay and Gemechis File Duressa, Almost second-order uniformly convergent numerical method for singularly perturbed convection-diffusion-reaction equations with delay, APPLICABLE ANALYSIS, 100(2021) https://doi.org/10.1080/00036811.2021.1961756.

  3. Naol Tufa Negero and Gemechis File Duressa, A method of line with improved accuracy for singularly perturbed parabolic convection-diffusion problems with large temporal lag, Results in Applied Mathematics, 11 (2021) 100174; https://doi.org/10.1016/j.rinam.2021.100174.

  4. Tesfaye Aga Bullo, Guy Aymard Degla, and Gemechis File Duressa, Parameter-uniform finite difference method for singularly perturbed parabolic problem with two small parameters, International Journal for Computational Methods in Engineering Science and Mechanics; https://doi.org/10.1080/15502287.2021.1948148.

  5. Imiru Takele Daba and Gemechis File Duressa, A hybrid numerical scheme for singularly perturbed parabolic differential-difference equations arising in the modeling of neuronal variability, Comp and Math Methods, (2021), e1178; https://doi.org/10.1002/cmm4.1178.

  6. Gemechis File Duressa, Novel approach to solve singularly perturbed boundary value problems with negative shift parameter, Heliyon, 7(2021) e07497; https://doi.org/10.1016/j.heliyon.2021.e07497.

  7. Meku Ayalew, Gashu Gadisa Kiltu and Gemechis File Duressa, Fitted numerical scheme for second order singularly perturbed differential-difference equations with mixed shifts, Abstract and Applied Analysis, (2021) Volume 2021, Article ID 4573847, 11 pages; https://doi.org/10.1155/2021/4573847.

  8. Bediru Mustefa Abagero, Gemechis File Duressa and Habtamu Garoma Debela, Singularly perturbed robin type boundary value problems with discontinuous source term in geophysical fluid dynamics, Iranian Journal of Numerical Analysis and Optimization, Vol. 11, No. 2, (2021),351-364; DOI:10.22067/ijnao.2021.70376.1033.

  9. Mesfin Mekuria Woldaregay and Gemechis File Duressa, Robust mid-point upwind scheme for singularly perturbed delay differential equations, Computational and Applied Mathematics, (2021) 40:178; https://doi.org/10.1007/s40314-021-01569-5.

  10. Mesfin Mekuria Woldaregay and Gemechis File Duressa, Exponentially fitted tension spline method for singularly perturbed differential difference equations, Iranian Journal of Numerical Analysis and Optimization, Vol. 11, No. 2, (2021), 261-282; https://10.22067/ijnao.2021.68227.1009.

  11. Imiru Takele Daba and Gemechis File Duressa, Hybrid Algorithm for singularly perturbed delay parabolic partial differential equations, Applications and Applied Mathematics: An International Journal (AAM), 16(1) (2021) 397–416.

  12. Mesfin Mekuria Woldaregay and Gemechis File Duressa, Robust numerical method for singularly perturbed parabolic differential equations with negative shifts, FILOMAT, 35(7) (2021) 2383–2401; https://doi.org/10.2298/FIL2107383W.

  13. Masho Jima Kabeto and Gemechis File Duressa, Robust numerical method for singularly perturbed semilinear parabolic differential difference equations, Mathematics and Computers in Simulation 188 (2021) 537–547; https://doi.org/10.1016/j.matcom.2021.05.005.

  14. Merga Amara Angasu, Gemechis File Duressa and Mesfin Mekuria Woldaregay, Exponentially fitted numerical scheme for singularly perturbed differential equations involving small delays, Journal of Applied Mathematics and Informatics, 39(3-4) (2021), 419 – 435; https://doi.org/10.14317/jami.2021.419.

  15. Worku Tilahun Anilay, Gemechis File Duressa and Mesfin Mekuria Woldaregay, Higher order uniformly convergent numerical scheme for singularly perturbed reaction-diffusion problems, KYUNGPOOK Math. J., (2021) 61(3):591-612.

  16. Tesfaye Aga Bullo, Guy Aymard Degla and Gemechis File Duressa, uniformly convergent higher-order finite difference scheme for singularly perturbed parabolic problems with non-smooth data, Journal of Applied Mathematics and Computational Mechanics 20(1) (2021) 5-16; https://doi.org/10.17512/jamcm.2021.1.01.

  17. Mesfin Mekuria Woldaregay and Gemechis File Duressa, Robust numerical scheme for solving singularly perturbed differential equations involving small delays, Applied Mathematics E-Notes, 21(2020) 622-633.

  18. Tesfaye Aga Bullo, Gemechis File Duressa and Guy Aymard Degla, Accelerated fitted operator finite difference method for singularly perturbed parabolic reaction-diffusion problems, Computational Methods for Differential Equations, 9(3) (2021) 886-898;

https://doi.org/10.22034/cmde.2020.39685.1737.

  1. Mesfin Mekuria Woldaregay and Gemechis File Duressa, Fitted Numerical Scheme for Solving Singularly Perturbed Parabolic Delay Partial Differential Equations, Tamkang Journal of Mathematics, 53(2021); https://doi.org/10.5556/j.tkjm.53.2022.3638.

  2. Gashu Gadisa Kiltu, Gemechis File Duressa and Tesfaye Aga Bullo, Computational method for singularly perturbed delay differential equations of the reaction-diffusion type with negative shift, Journal of Ocean Engineering and Science, 6(3) (2021) 285–291; https://doi.org/10.1016/j.joes.2021.02.001.

  3. Chernet Tuge Deressa and Gemechis File Duressa, Analysis of Atangana–Baleanu fractional-order SEAIR epidemic model with optimal control, Advances in Difference Equations (2021) 2021:174 https://doi.org/10.1186/s13662-021-03334-8.

  4. Fasika Wondimu Gelu and Gemechis File Duressa, Uniformly convergent collocation method for singularly perturbed delay parabolic reaction-diffusion problem, Abstract and Applied Analysis, (2021) Volume 2021, Article ID 8835595, 11 pages https://doi.org/10.1155/2021/8835595.

  5. Mesfin Mekuria Woldaregay, Worku Tilahun Anilay and Gemechis File Duressa, Novel numerical scheme for singularly perturbed time delay convection-diffusion equation, Advances in Mathematical Physics, Volume 2021, Article ID 6641236, 13 pages https://doi.org/10.1155/2021/6641236.

  6. Imiru Takele Daba and Gemechis File Duressa, Extended B-spline collocation method for singularly perturbed parabolic differential-difference equation arising in computational neuroscience, International Journal for Numerical Methods in Biomedical Engineering, 37(2) (2021) e3418, 1-20; https://doi.org/10.1002/cnm.3418.

  7. Tariku Birabasa Mekonnen and Gemechis File Duressa, Uniformly convergent numerical method for two-parametric singularly perturbed parabolic convection-diffusion problems, Journal of Applied and Computational Mechanics 7(2) (2021) 535-545.

  8. Mesfin Mekuria Woldaregay and Gemechis File Duressa, Higher order uniformly convergent numerical scheme for singularly perturbed differential difference equations with mixed small shifts, International Journal of Differential Equations, Volume 2020, Article ID 6661592, 15 pages.

  9. Chernet Tuge Deressa and Gemechis File Duressa, Optimal control and sensitivity analysis for transmission dynamics of coronavirus, Results in Physics, 19 (2020) 103642.

  10. Chernet Tuge Deressa and Gemechis File Duressa, Modeling and optimal control analysis of transmission dynamics of COVID-19: the case of Ethiopia, Alexandria Engineering Journal, 60 (2021), 719–732.

  11. Habtamu Garoma Debela and Gemechis File Duressa, Fitted operator finite difference method for singularly perturbed differential equations with integral boundary condition, Kragujevac Journal of Mathematics 47(4) (2023), 637–651.

  12. Yohannis Alemayehu Wakjira and Gemechis File Duressa, Exponential Spline method for solving singularly perturbed third order boundary value problems, Demonstratio Mathematica 53 (2020) 360–372.

  13. Tariku Birabasa Mekonnen and Gemechis File Duressa, computational method for singularly perturbed two-parameter parabolic convection-diffusion problems, Cogent Mathematics & Statistics, 7 (2020), 1829277.

  14. Tesfaye Aga Bullo, Gemechis File Duressa and Guy Aymard Degla, Robust finite difference method for singularly perturbed two parameter parabolic convection-diffusion problems, International Journal of Computational Methods 18(2) 2050034 (2021), https://doi.org/10.1142/S0219876220500346.

  15. Habtamu Garoma Debela and Gemechis File Duressa, Uniformly convergent numerical method for singularly perturbed convection-diffusion type problems with nonlocal boundary condition, International Journal for Numerical Methods in Fluids, 92(2020), 1914–1926. https://doi.org/10.1002/fld.4854.

  16. Derartu Ayansa Turuna, Mesfin Mekuria Woldaregay and Gemechis File Duressa, Uniformly convergent numerical method for singularly perturbed convection-diffusion problems, KYUNGPOOK Math. J. 60(2020), 629-645.

  17. Murad H. Salih, Gemechis File Duressa, Habtamu Garoma Debela, Numerical solution of singularly perturbed self-adjoint boundary value problem using Galerkin method, International Journal of Engineering, Science and Technology, (2020) 12(3): 26-37.

  18. Dula Ayele Gurmessa, Gemechis File Duressa and Gashu Gadisa Kiltu, Fitted non-polynomial cubic spline method for singularly perturbed delay convection-diffusion equations, SINET: Ethiop. J. Sci. (2017) 40(1): 1-8.

  19. Gashu Gadisa Kiltu, Gemechis File Duressa and Tesfaye Aga Bullo, Numerical treatment of singularly perturbed delay reaction-diffusion Equations, International Journal of Engineering, Science and Technology, (2020) 12(1): 15-24.

  20. Habtamu Garoma Debela and Gemechis File Duressa, Accelerated fitted operator finite difference method for singularly perturbed delay differential equations with non-local boundary condition, Journal of the Egyptian Mathematical Society (2020) 28:16, https://doi.org/10.1186/s42787-020-00076-6.

  21. Habtamu Garoma Debela and Gemechis File Duressa, Accelerated exponentially fitted operator method for singularly perturbed problems with integral boundary condition, International Journal of Differential Equations, Volume 2020, Article ID 9268181, 8 pages: https://doi.org/10.1155/2020/9268181.

  22. Gemechis File Duressa, Gashu Gadisa Kiltu, Tesfaye Aga Bullo and Aynalem Girma Kassaye, Non-polynomial spline method for solving nonlinear two point boundary value problems, Ethiop. J. Educ. & Sc. 15(1) (2019) 42-59.

  23. Muslima Kedir Siraj, Gemechis File Duressa & Tesfaye Aga Bullo, Fourth-order stable central difference with Richardson extrapolation method for second-order self-adjoint singularly perturbed boundary value problems, Journal of the Egyptian Mathematical Society (2019) 27:50, https://doi.org/10.1186/s42787-019-0047-4.

  24. Habtamu Garoma Debela & Gemechis File Duressa, Exponentially fitted finite difference method for singularly perturbed delay differential equations with integral boundary condition, Int J Eng Appl Sci 11(4) (2019) 476-493, http://dx.doi.org/10.24107/ijeas.647640.

  25. Tesfaye Aga Bullo, Gemechis File Duressa & Guy Degla, Higher order fitted operator finite difference method for two-parameter parabolic convection-diffusion problems, Int J Eng Appl Sci, 11(4) (2019) 455-467, http://dx.doi.org/10.24107/ijeas.644160.

  26. Tesfaye Aga Bullo, Gemechis File Duressa & Guy Degla, Fitted operator average finite difference method for solving singularly perturbed parabolic convection-diffusion problems, Int J Eng Appl Sci, 11(3) (2019), 414-427. http://dx.doi.org/10.24107/ijeas.567374.

  27. Mesfin Mekuria Woldaregay and Gemechis File Duressa, Uniformly convergent numerical method for singularly perturbed delay parabolic differential equations arising in computational neuroscience, Kragujevac Journal of Mathematics, 46:1 (2022), 65–84.

  28. Mesfin Mekuria Woldaregay and Gemechis File Duressa, Parameter uniform numerical method for singularly perturbed parabolic differential difference equations, Journal of the Nigerian Mathematical Society, 38:2, (2019) 223-245.

  29. Teklu Tafesse Olkaba, Adula Bekele Hunde, Tadesse Regassa Mamo, Gemechis File Duressa and Dereje Daksa Keno, Analysis of the teacher training system in Ethiopia with specific reference to areas for improvement, Mekerere Journal of Higher Education, 10:2 (2019) 157–170; https://ajol.info/majohe.

  30. Aynalem Tafere Chekole, Gemechis File Duressa and Gashu Gadisa Kiltu, Non-polynomial septic spline method for singularly perturbed two point boundary value problems of order three, Journal of Taibah University for Science, 13:1 (2019) 651–660; https://doi.org/10.1080/16583655.2019.1617986.

  31. Gashu Gadisa Kiltu and Gemechis File Duressa, Accurate numerical method for Liénard nonlinear differential equations, Journal of Taibah University for Science, 13:1 (2019) 740-745; https://doi.org/10.1080/16583655.2019.1628627.

  32. Gashu Gadisa and Gemechis File, Fitted fourth order scheme for singularly perturbed delay convection-diffusion equations, Ethiopian Journal of Education and Sciences, 14:2 (2019) 102-118.

  33. Tadele Dugassa, Gemechis File & Tesfaye Aga, Stable numerical method for singularly perturbed boundary value problems with two small parameters, Ethiopian Journal of Education and Sciences, 14:2 (2019) 9-27.

  34. Tadesse Regassa, Adula Bekele, Gemechis File, Teklu Tafesse, and Dereje Daksa, A look in to leadership and leadership development practices in Ethiopia: A stakeholder analysis, International Journal of Multidisciplinary Research and Development, 6: 3 (2019) 40-44.

  35. Muluneh Dingeta, Gemechis File & Tesfaye Aga, Numerical solution of second order one dimensional linear hyperbolic telegraph equation. Ethiopian Journal of Education and Sciences, 14:1 (2018) 39-52.

  36. Feyisa Edosa & Gemechis File, higher order compact finite difference method for singularly perturbed one dimensional reaction diffusion problems. Journal of the Nigerian Mathematical Society, 36:3 (2017) 491-502.

  37. Yohannis A, Gemechis F. & Tesfaye A., Quintic Non-polynomial spline methods for third order singularly perturbed boundary value problems, Journal of King Saud University – Science, 30 (2018) 131-137, http://dx.doi.org/10.1016/j.jksus.2017.01.008.

  38. Gashu G, Gemechis F. & Tesfaye A., Fourth Order Numerical Method for Singularly Perturbed Delay Differential Equations, International Journal of Applied Sciences and Engineering 15(1) (2018) 17-32.

  39. Yitbarek Z, Gemechis F. & Tesfaye A., Sixth order stable central difference method for self-adjoint singularly perturbed two-point boundary value problems, Ethiopian Journal of Education and Sciences, 13(1) (2017) 23-41.

  40. Fasika Wondimu, Gemechis File & Tesfaye Aga, Sixth order compact finite difference method for singularly perturbed 1D reaction diffusion problems, Journal of Taibah University for Science, 11(2) March (2017) 302-308.

  41. Gemechis File, Gashu Gadisa, Tesfaye Aga & Y. N. Reddy, Numerical solution of singularly perturbed delay reaction-diffusion equations with layer or oscillatory behaviour, American Journal of Numerical Analysis, 5(1) (2017) 1-10.

  42. Gemechis File, Tesfaye Aga & Gashu Gadisa, Fourth order compact finite difference method for solving one dimensional wave equation, International Journal of Engineering & Applied Sciences (IJEAS), 8(4) (2016), 30-39.

  43. Gemechis File & Tesfaye Aga, Numerical Solution of Quadratic Riccati Differential equations, Egyptian Journal of Basic and Applied Sciences, 3(4) (2016) 392-397, http://dx.doi.org/10.1016/j.ejbas.2016.08.006.

  44. Fasika Wondimu, Gemechis File & Tesfaye Aga, Tenth Order Compact Finite Difference Method for Solving Singularly Perturbed 1D Reaction-Diffusion Equations, International Journal of Engineering & Applied Sciences (IJEAS), 8:3 (2016) 15-24.

  45. Fasika Wondimu, Gemechis File & Tesfaye Aga, Fourth Order Compact Finite Difference Method for Solving Singularly Perturbed 1D Reaction Diffusion Equations with Dirichlet Boundary Conditions, Momona Ethiopian Journal of Science, 8:2 (2016) 168-181.

  46. Terefe Asrat, Gemechis File & Tesfaye Aga, Fourth Order Stable Central Difference Method for Self-Adjoint Singular Perturbation Problems, The Ethiopian Journal of Science and Technology, 9:1 (2016) 53–68.

  47. Gemechis File, Awoke Andargie & Reddy Y. N., Fitted-Stable Finite Difference Method for Singularly Perturbed Two Point Boundary Value Problems, Ethiopian Journal of Education and Sciences, 11:1 (2015) 61-76.

  48. Gemechis File & Y. N Reddy, Domain Decomposition Method for Singularly Perturbed Differential Difference Equations with Layer Behaviour, International Journal of Engineering & Applied Sciences (IJEAS), 7: 1(2015) 86-102.

  49. Gemechis File & Y. N Reddy, Terminal Boundary Value Technique for Solving Singularly Perturbed Delay Differential Equations, Journal of Taibah University for Science, 8:3 (2014) 289–300.

  50. Gemechis File & Y. N Reddy, A Non-Asymptotic Method for Singularly Perturbed Delay Differential Equations, Journal of Applied Mathematics and Informatics, 32:1-2(2014) 39-53.

  51. Gemechis File & Y. N Reddy, Domain Decomposition Method for Solving Singular Perturbation Problems, International Journal of Applied Science and Engineering, 11:4 (2013) 433-448.

  52. Gemechis File & Y. N Reddy, Computational Method for Solving Singularly Perturbed Delay Differential Equations with Negative Shift, International Journal of Applied Science and Engineering, 11:1 (2013) 101-113.

  53. Gemechis File. & Y. N Reddy, Fitted-Modified Upwind Finite Difference Method for Solving Singularly Perturbed Differential Difference Equations, International Journal of Mathematical Models and Methods in Applied Sciences, 6:7 (2012) 791-802.

  54. Gemechis File & Y. N Reddy, Numerical Integration Method for Singularly Perturbed Differential-Difference Equations, International Review of Automatic Control: Theory and Application, 5:6 (2012) 868-876.

  55. Gemechis File & Y. N Reddy, Numerical Integration of a Class of Singularly Perturbed Delay Differential Equations with Small Shift, International Journal of Differential Equations, Volume 2012, Article ID 572723, doi:10.1155/2012/572723.

  56. Gemechis File & Y. N Reddy, Fitted-Stable central Difference Method for Solving Singularly Perturbed Delay Differential Equations, International Journal of Mathematical Science & Engineering Applications, 6:6 (2012) 271-290.

  57. Gemechis File & Ayalew Shibeshi, Instructors’ Perception of the Leadership Styles of Their Department Heads at Jimma University, The Ethiopian Journal of Education, 32:1 (2012) 93-122.

  58. Gemechis File & Ayalew Shibeshi, Department Heads’ Self-Perception of their Leadership Styles at Jimma University, Ethiopian Journal of Education and Sciences, 7:2 (2012) 97-114.

  59. Prashanth K. & Gemechis File, Infant and Child Mortality in Ethiopia: Statistical Analysis Approach, Ethiopian Journal of Education and Sciences, 5:2 (2010) 51-57.

  60. Fekede Tuli & Gemechis File, Practicum Experience in teacher Education. Ethiopian Journal of Education and Sciences, 5:1 (2009) 107-116.

Contact Address: Dean, College of Natural Sciences, Jimma University

P.O. Box 378

Office Telephone: +251471120739

Mobile: +251942565096

Jimma, Ethiopia

E-mail: gammeef@yahoo.com ; gemechis.file@ju.edu.et

Google Scholar: https://scholar.google.co.uk/citations?user=JWLNmWAAAAAJ&hl=en

Scopus Author ID: 57216182204

ORCID ID: https://orcid.org/0000-0003-1889-4690

Feyisa Edosa Merga 

  • Title: Mr.
  • Full Name: Feyisa Edosa Merga 
  • Nationality: Ethiopia
  • Academic Rank: Lecturer
  • College/institute: College of Natural Sciences
  • Department: Mathematics
  • Field of specialization: Numerical Analysis
  • Research interest: Numerical Solution of Singularly Perturbed Problems.
  • Publications:
  1. Modified Crank–Nicolson Scheme with Richardson Extrapolation for One- Dimensional Heat Equation. May 2021 .Iranian Journal of Science and Technology. Transaction A, Science 45(54) DOI:10.1007/s40995-021-01141-0
  2. Higher Order Compact Finite Difference Method for Singularly Perturbed One Dimensional Reaction Diffusion Problems. January 2017.Journal of the Nigerian Mathematical Society 36(3):491-502.
  • Contact Address:

 

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Habtamu Garoma Debela

Title: Dr.

Full Name: Habtamu Garoma Debela

Nationality: Ethiopian

Academic Rank: Assistant Professor

College/institute: College of Natural Sciences

Department: Mathematics

Field of specialization: Mathematics (Numerical Analysis)

Research interest: Broadly focuses on singularly perturbed differential equations problems with and without delay; Finite Difference Methods, Fitted Operator and Fitted Mesh Methods for Solving Singularly Perturbed Boundary Value Problem in ODE’s and PDE’s.

List of Publications:

  1. Mulgeta Gebeyehu Gelu, Habtamu Garoma Debela and Ayana Deressa, Fitted numerical method for singularly perturbed semilinear three-point boundary value problem. Iranian Journal of Numerical Analysis and Optimization. Iranian Journal of Numerical Analysis and Optimization (2021). DOI:10.22067/ijnao.2021.70805.1040 (Indexed in Scopus)

  2. Habtamu Garoma Debela and Gemechis File Duressa, Uniformly convergent non-polynomial spline method for singularly perturbed robin-type boundary value problems with discontinuous source term, Abstract and Applied Analysis, Volume 2021, Article ID 7569209, 12 pages; https://doi.org/10.1155/2021/7569209. (Indexed in Scopus)

  3. Mesfin Mekuria Woldaregay, Habtamu Garoma Debela and Gemechis File Duressa, Uniformly Convergent Fitted Operator method for singularly perturbed delay differential equations. Computational Methods for Differential Equations. Computational Methods for Differential Equations.(2021) DOI:10.22034/cmde.2021.41166.1789 (Indexed in and Web of Science)

  4. Habtamu Garoma Debela. Exponential Fitted Operator Method for Singularly Perturbed Convection-Diffusion Type Problems with Nonlocal Boundary Condition. Abstract and Applied Analysis 2021(2021). https:/ /doi.org/10.1155/2021/5559486. (Indexed in Scopus)

  5. Habtamu Garoma Debela. Robust numerical method for singularly perturbed differential equations having both large and small delay. Arab Journal of Mathematical Sciences, 2021. https: //www.emerald.com/insight/2588-9214.htm. (Indexed in Scopus)

  6. Habtamu Garoma Debela, Solomon Bati Kejela, and Ayana Deressa Negassa. Exponentially Fitted Numerical Method for Singularly Perturbed Differential-Difference Equations International Journal of Differential Equations, Volume 2020, Article ID 5768323, 13 pages https://doi.org/10.1155/2020/5768323, Hindawi (Indexed in both Scopus and Web of Science)

  7. Gemechis File Duressa and Habtamu Garoma Debela. Numerical solution of singularly perturbed differential difference equations with mixed parameters. Journal of Mathematical Modeling. 9(4)(2021), pp. 691-705. http://jmm.guilan.ac.ir (Indexed in Scopus)

  8. Bediru Musa Abagero, Gemechis File Duressa, and Habtamu Garoma Debela. Singularly perturbed robin type boundary value problems with discontinuous source term in geophysical fluid dynamics. Iranian Journal of Numerical Analysis and Optimization. https://doi.org/10.1002/fld.4854. (Indexed in Scopus)

  9. Habtamu Garoma Debela and Gemechis File Duressa. Uniformly Convergent Numerical Method for singularly perturbed Convection-Diffusion type Problem with nonlocal Boundary Condition. Int J Numer Meth Fluids 2020;1-13. https://doi.org/10.1002/fld.4854. (Indexed in both Scopus and Web of Science)

  10. Habtamu Garoma Debela and Gemechis File Duressa. Fitted operator finite difference method for Singularly perturbed differential equations with Integral boundary condition. Kragujevac Journal of Mathematics Volume 47(4) (2023), Pages 637–651. (Indexed in both Scopus and Web of Science)

  11. Habtamu Garoma Debela and Gemechis File Duressa. Accelerated Exponentially Fitted Operator Method for Singularly Perturbed Problems with Integral Boundary Condition. International Journal of Differential Equations, Volume 2020, Article ID 9268181, 8 pages, https://doi.org/10.1155/2020/9268181, Hindawi(Indexed in both Scopus and Web of Science)

  12. Habtamu Garoma Debela and Gemechis File Duressa. Accelerated fitted operator finite difference method for singularly perturbed delay differential equations with nonlocal Boundary Condition. Journal of the Egyptian Mathematical Society (2020) 28:1-16 https://doi.org/10.1186/s42787-020-00076-6. (Springer).

  13. Habtamu Garoma Debela and Gemechis File Duressa. Exponentially Fitted Finite Difference Method for Singularly Perturbed Delay Differential Equations with Integral Boundary Condition. International Journal of Engineering & Applied Sciences (IJEAS), Vol.11, Issue 4 (2019) 476-493, http://dx.doi.org/10.24107/ijeas.647640

  14. Habtamu Garoma Debela, Habtamu Bayissa Yadata and Solomon Bati Kejela. Numerical solution of Second order initial value problems of Bratu-type equations using higher order Runge-Kutta method. International Journal of Scientific and Research Publications, Volume 7, Issue 10, October 2017, ISSN 2250-3153.

  15. Habtamu Garoma Debela and Masho Jima Kebeto. Numerical solution of fourth order ordinary differential equations using fifth order Runge – Kutta method. Asian Journal of Science and Technology, Vol. 08, Issue, 02, pp.4332-4339, February, 2017.

  16. Gashu Gaddisa Kiltu and Habtamu Garoma Debela. Comparison of Higher Order Taylor’s Method and Runge-Kutta Methods for Solving First Order Ordinary Differential Equations. Journal of Computer and Mathematical Sciences, Vol.8 (1), 12-23 January 2017.

  17. Chernet Tuge Deressa and Habtamu Garoma Debela. Assessment of teacher’s beliefs and their problem solving views in the teaching and learning of mathematics in second cycle primary schools (grades 5-8): The Case of Oromia regional state, Ethiopia. International Journal of Current Research, Vol. 8, Issue, 09, pp.39334-39349, September, 2016.(Mathematics Education research).

  18. Habtamu Garoma Debela and Hailu Muleta. An assessment of Jimma zone grade 10 students’ extrinsic motivations towards Mathematics. International Journal of Current Research, Vol. 8, Issue, 09, pp.38756-38770, September, 2016..(Mathematics Education research).

  19. Hailu Muleta and Habtamu Garoma Debela. Assessment of grade10 students’ performance in mathematics: the case of Jimma zone. International Journal of Current Research, Vol. 8, Issue, 09, pp.38620-38627, September, 2016. .(Mathematical Education research).

Contact Address: College of Natural Sciences Teachers Education Programs Coordinator, Jimma University

P.O. Box 378

Mobile: +251923432687

Jimma, Ethiopia

E-mail: habte200@gmail.com ; habtamu.garoma@ju.edu.et

Scopus Author ID: 57216180596

ORCID ID: https://orcid.org/0000-0003-1033-3602

 

Dinka Tilahun Etefa

  • Title: Mr.
  • Full Name:  Dinka Tilahun Etefa
  • Nationality: Ethiopia
  • Academic Rank: Lecturer
  • College/institute: College of Natural Sciences
  • Department: Mathematics
  • Field of specialization: Differential Equation
  • Research interest: Mathematical Modelling and Analysis of Real World Phenomena
  • Publication:

1. Parameter Based Stability Analysis of Generalized Mathematical Model with Delay of Competition Between two Species

 

Contact Address:

  • Email: dinkatilahun34@gmail.com
  • Tel: +251922232854
  • Fax:
  • P.O. Box:

 

Dechas Ibrahim Ahmed

  • Title: Mr
  • Full Name: Dechas Ibrahim Ahmed
  • Nationality: Ethiopia
  • Academic Rank: Lecturer
  • College/institute: College of Natural Sciences
  • Department: Mathematics
  • Field of specialization: Differenrial
  • Research interest:
  • Publications:

  1. Optimal Homotopy Asymptotic Method for Investigation of Effects of Thermal Radiation, Internal Heat Generation, and Buoyancy on Velocity and Heat Transfer in the Blasius Flow

  • Contact Address:
  • Email:dechasib2010@gmail.com
  • Tel:+251939114579
  • Fax:
  • P.O. Box:

Passport size picture is preferable; otherwise it can be left empty

 

 Chernet Tuge Deressa

  • Title: Dr.
  • Full Name:  Chernet Tuge Deressa
  • Nationality: Ethiopian
  • Academic Rank: Associate Professor
  • College/institute: College of Natural Sciences
  • Department: Mathematics
  • Field of specialization: Mathematics (Modelling and Control of Dynamical Systems )
  • Research interest:
  • Modelling Dynamics
  • Control of Dynamic systems
  • Stability and Bifurcation analysis of Dynamic systems
  • Fractional differential Equations and applications
  • Mathematics Education
  • Publications:
  1.  Deressa CT, Duressa GF, Investigation of the dynamics of COVID-19 with SEIHR nonsingular and nonlocal kernel fractional model. International Journal of Modelling and Simulation. 2021 Dec 27:1-20.  DOI: 10.1080/02286203.2021.2012636 
  2. Rezapour S, Deressa CT, Etemad S. On a Memristor-Based Hyperchaotic Circuit in the Context of Nonlocal and Nonsingular Kernel Fractional Operator. Journal of Mathematics. 2021 Oct 25;2021.

 

  1. Etemad S, Tellab B, Deressa CT, Alzabut J, Li Y, Rezapour S. On a generalized fractional boundary value problem based on the thermostat model and its numerical solutions via Bernstein polynomials. Advances in Difference Equations. 2021 Dec;2021(1):1-20.

 

  1. Rezapour S, Tellab B, Deressa CT, Etemad S, Nonlaopon K. HU-Type Stability and Numerical Solutions for a Nonlinear Model of the Coupled Systems of Navier BVPs via the Generalized Differential Transform Method. Fractal and Fractional. 2021 Dec;5(4):166.

 

  1. Deressa CT, Etemad S, Rezapour S. On a new four-dimensional model of memristor-based chaotic circuit in the context of nonsingular Atangana–Baleanu–Caputo operators. Advances in Difference Equations. 2021 Dec;2021(1):1-24.

 

  1. Deressa CT, Etefa DT. Parameter based stability analysis of generalized mathematical model with delay of competition between two species. Applied Mathematics and Computation. 2021 Apr 1;394:125791. (Q1 journal)

 

  1. Deressa CT, Duressa GF. Analysis of Atangana–Baleanu fractional-order SEAIR epidemic model with optimal control. Advances in Difference Equations. 2021 Dec;2021(1):1-25. (Q2 Journal)

 

  1. Deressa CT, Mussa YO, Duressa GF. Optimal control and sensitivity analysis for transmission dynamics of Coronavirus. Results in Physics. 2020 Dec 1;19:103642. (Q2 Journal)
  2. Deressa CT, Duressa GF. Modeling and Optimal Control Analysis of Transmission Dynamics of COVID-19: The Case of Ethiopia. Alexandria Engineering Journal. 2020 Oct 9. (Q1 journal)

 

  1. Mitiku D., and Chernet T.Boundary Layer flow over a moving horizontal plate in a moving fluid with the presence of Thermal Radiation.// Ethiop. J. Educ. & Sc. Vol. 13 No. 2 March, 2018. Pp.83-96.
  1. Chernet T., and Natinael G. Stability Analysis of Dynamics of Variable Mass System.//Assian Journal of Applied Science and Technology (AJAST). Vol.1,issue 9, 19November,2017. Pp305-313.

  2. Chernet T., and Mitiku D. Stability Analysis of Delayed Cournot Model in the sense of Lyapunov. // Ethiop. J. Educ. & Sc. Vol. 12 No. 2 March, 2017.Pp.67-80.

  3. Chernet T. D. and Habtamu G. Assessment of teachers’ beliefs and their problem solving views in the teaching and learning of mathematics in second cycle primary schools (Grades 5-8): The case of Oromia regional state, Ethiopia.//International Journal of Current Research, September, 2016. Volume 08, issues 09, Pp: 39334-39349.

  4. Chernet T. D. Investigation of Nonholonomic Mechanics,Vakonomic Mechanics and Chetaev Method in Modeling constrained Dynamic Systems. // Ethiop. J. Educ. & Sc. Vol. 11 No. 1 September, 2015.Pp.21-37.

  1. Mukharlyamov R.G., Chernet T. D Stabilization of redundantly constrained dynamic system. // Bulletin of PFUR. Series Mathematics, Information Science, Physics. 2015. №1.Pp. 60-72.

  2. Mukharlyamov R.G., Chernet T. D Dynamic equations of controlled mechanical system with redundant holonomic constraints. //Herald of Kazan technological University. 2014. Т.17. №.11. Pp.236-243.

  3. Chernet T. D Trajectory tracking control of programmed motion in Second Order nonholonomic systems. // Bulletin of PFUR. Series Mathematics, Information Science, Physics.2014. №4. Рр.95-105.

  4. Chernet T. D. Constructing dynamic equations of constrained mechanical systems. // Bulletin of PFUR. Series Mathematics, Information Science, Physics. 2013. №3. Pp. 92-104.

Contact Address:

/ tugechernet@gmail.com/ chernettuge@ymail.com

 

  • Tel:+251911748220
  • Fax:
  • P.O. Box:

 

 

BONSA ABDISA JOTE 

  • Title: Mr
  • Full Name: BONSA ABDISA JOTE 
  • Nationality: ETHIOPIAN
  • Academic Rank: (Lecturer )
  • College/institute: College of Natural Sciences
  • Department: MATHEMATICS
  • Field of specialization: DIFFERENTIAL EQUATION
  • Research interest: area of(related to) differential equation
  • Publications:
  • Contact Address: