PUBLICATIONS AND RESEARCH OUTPUTS

Journal Articles

1. O. Olela Otafudu and M.S. Zweni, On expansive homeomorphisms on a quasi-uniform space, Filomat (to appear).

2. D. Bugajewski, P. Kasprzak, and O. Olela Otafudu, Hyperconvexity in partial metric spaces: challenges and outlooks, arXiv preprint arXiv:2601.02279 (2026).

3. P. Haihambo and O. Olela Otafudu, Addendum to "Entropy on quasi-uniform spaces" [Acta Math. Hungar. 171 (2023), 241–266], Acta Math. Hungar. 178 (2026), 239–241.

4. O. Olela Otafudu, On the Gromov–Hausdorff quasi-metric distance, Topology Proc. 68 (2026), 75–91.

5. O. Olela Otafudu and O.T. Phawe, On the modular metric completion, Appl. Gen. Topol. 26 (2025), 827–838.

6. O. Olela Otafudu, On asymmetric semi-inner product spaces, Selected Papers of the 2023 International Conference on Topology and its Applications (2025), 141–157.

7. Z. Mushaandja and O. Olela Otafudu, On the modular metric topology, Topology Appl. 372 (2025), 109224.

8. P. Haihambo and O. Olela Otafudu, Quasi-uniform entropy vs. topological entropy, Topology Appl. 356 (2024), 109054.

9. O. Olela Otafudu, M.S. Zweni, and M. Dibona, Expansive homeomorphisms on quasi-metric spaces, Appl. Gen. Topol. 25 (2024), 1–15.

10. O. Olela Otafudu and O.T. Phawe, On one-local retracts in modular metrics, Categ. Gen. Algebr. Struct. Appl. 20 (2024), 201–219.

11. P. Haihambo and O. Olela Otafudu, Entropy on quasi-uniform spaces, Acta Math. Hungar. 171 (2023), 241–266.

12. D.K. Mukonda, O. Olela Otafudu, and W.T. Bombe, On ultra-quasi-tight extensions, Math. Appl. 12 (2023), 101–114.

13. P. Haihambo and O. Olela Otafudu, On entropy in quasi-metric spaces, Topology Appl. 332 (2023), 108512.

14. O. Olela Otafudu and M.S. Zweni, W-convexity on the Isbell-convex hull of an asymmetrically normed real vector space, Filomat 37 (2023), 1975–1988.

15. O. Olela Otafudu and D. Mukonda, On Bourbaki-bounded sets on quasi-pseudometric spaces, Math. Appl. 8 (2022), 155–168.

16. O. Olela Otafudu and K. Sebogodi, On $w$-Isbell-convexity, Appl. Gen. Topol. 23 (2022), 91–105.

17. C. Gilmour, O. Olela Otafudu, F.G. Russo, and A. Schauerte, Remembering Hans-Peter Künzi (1955–2020), Topology Appl. 305 (2022), 107904.

18. D.K. Mukonda, O. Olela Otafudu, and W.T. Bombe, Katětov constructions on asymmetric spaces, Topology Appl. 307 (2022), 107962.

19. O. Olela Otafudu, On superample functions on extended quasi-pseudometric spaces, Houston J. Math. 47 (2021), 483–497.

20. H. Sabao and O. Olela Otafudu, Some aspects of quasi-uniform box products, Novi Sad J. Math. 51 (2021), 43–60.

21. O. Olela Otafudu and O. Valero, On information orders on metric spaces, Information 12 (2021), 427.

22. O. Olela Otafudu, Maps that preserve left (right) $K$-Cauchy sequences, Hacet. J. Math. Stat. 50 (2021), 1466–1476.

23. H. Sabao and O. Olela Otafudu, Isbell convexity in fuzzy quasi-metric spaces, Khayyam J. Math. 7 (2021), 266–278.

24. H. Sabao and O. Olela Otafudu, On soft quasi-pseudometric spaces, Appl. Gen. Topol. 22 (2021), 17–30.

25. M. Gabeleh, S.P. Moshokoa, and O. Olela Otafudu, Approximate best proximity point sequences for $C^*$-mappings in strictly convex Banach spaces, Quaest. Math. 43 (2020), 1791–1807.

26. M. Gabeleh, S.I.E. Manna, A.A. Eldred, and O. Olela Otafudu, Strong and weak convergence of Ishikawa iterations for best proximity pairs, Open Math. 18 (2020), 10–21.

27. O. Olela Otafudu, Y. Mutemwa, and H. Sabao, On gluing of quasi-pseudometric spaces, Khayyam J. Math. 6 (2020), 129–140.

28. O. Olela Otafudu, W.B. Toko, and D. Mukonda, On bornology of extended quasi-metric spaces, Hacet. J. Math. Stat. 48 (2019), 1767–1777.

29. O. Olela Otafudu, Gated sets in $T_0$-quasi-metric spaces, Topology Appl. 263 (2019), 159–171.

30. H. Sabao and O. Olela Otafudu, Infinite games and quasi-uniform box products, Appl. Gen. Topol. 20 (2019), 57–73.

31. M. Gabeleh, O. Olela Otafudu, and N. Shahzad, Coincidence best proximity points in convex metric spaces, Filomat 32 (2018), 2451–2463.

32. M. Gabeleh, O. Olela Otafudu, and N. Shahzad, Best proximity point results using proximal normal structure revisited, J. Nonlinear Convex Anal. 19 (2018), 603–615.

33. O. Olela Otafudu, Some aspects of Isbell-convex quasi-metric spaces, Appl. Gen. Topol. 19 (2018), 173–187.

34. H. Sabao and O. Olela Otafudu, Set-valued maps and $q$-hyperconvex spaces, J. Nonlinear Convex Anal. 19 (2018), 1239–1250.

35. M. Gabeleh and O. Olela Otafudu, Markov–Kakutani's theorem for best proximity pairs in Hadamard spaces, Indag. Math. (N.S.) 28 (2017), 680–693.

36. M. Gabeleh, P. Julia Mary, A. Anthony Eldred, and O. Olela Otafudu, Cyclic pairs and common best proximity points in uniformly convex Banach spaces, Open Math. 15 (2017), 711–723.

37. J. Conradie, H.-P.A. Künzi, and O. Olela Otafudu, The vector lattice structure on the Isbell-convex hull of an asymmetrically normed real vector space, Topology Appl. 231 (2017), 92–112.

38. M. Gabeleh and O. Olela Otafudu, Global optimization of cyclic Kannan nonexpansive mappings in nonreflexive Banach spaces, Quaest. Math. 40 (2017), 739–751.

39. M. Gabeleh, O. Olela Otafudu, and R. Plebaniak, Proximal monotonicity in partially ordered metric spaces and $F$-cyclic contractions, Miskolc Math. Notes 18 (2017), 739–750.

40. O. Olela Otafudu and H. Sabao, On quasi-uniform box products, Appl. Gen. Topol. 18 (2017), 61–74.

41. Z. Mushaandja and O. Olela Otafudu, Quasi-metric trees and $q$-hyperconvex hulls, Turkish J. Math. 41 (2017), 122–131.

42. Z. Mushaandja and O. Olela Otafudu, Versatile asymmetrical tight extensions, Topol. Algebra Appl. 5 (2017), 6–12.

43. H.-P.A. Künzi and O. Olela Otafudu, Addendum to "The injective hull of ultra-quasi-metric versus $q$-hyperconvex hull of quasi-metric space" [Topology Appl. 203 (2016), 170–176], Topology Appl. 217 (2017), 95–96.

44. M. Gabeleh and O. Olela Otafudu, Best proximity point solutions for certain classes of cyclic contractions in ordered metric spaces, Bull. Math. Anal. Appl. 8 (2016), 35–48.

45. M. Gabeleh and O. Olela Otafudu, Nonconvex proximal normal structure in convex metric spaces, Banach J. Math. Anal. 10 (2016), 400–414.

46. M. Gabeleh and O. Olela Otafudu, Generalized pointwise noncyclic relatively nonexpansive mappings in strictly convex Banach spaces, J. Nonlinear Convex Anal. 17 (2016), 1117–1128.

47. O. Olela Otafudu, The injective hull of ultra-quasi-metric versus $q$-hyperconvex hull of quasi-metric space, Topology Appl. 203 (2016), 170–176.

48. S.N. Mishra and O. Olela Otafudu, Fixed point theorems in ultra-metric spaces, J. Nonlinear Convex Anal. 17 (2016), 377–386.

49. D.K. Mukonda and O. Olela Otafudu, The $\delta$-completion of a quasi-pseudometric space, Topology Appl. 189 (2015), 65–77.

50. O. Olela Otafudu, On one-local retracts in quasi-metric spaces, Topology Proc. 45 (2015), 271–281.

51. O. Olela Otafudu, On weak external $q$-hyperconvex spaces, Ann. Funct. Anal. 6 (2015), 96–109.

52. O. Olela Otafudu, A fixed point theorem in non-Archimedean asymmetrically normed linear spaces, Fixed Point Theory 16 (2015), 175–184.

53. O. Olela Otafudu, Extremal function pairs in asymmetrically normed linear spaces, Topology Appl. 166 (2014), 98–107.

54. O. Olela Otafudu, Quasi-metric trees in $T_0$-quasi-metric spaces, Topology Appl. 160 (2013), 1794–1801.

55. S.N. Mishra and O. Olela Otafudu, On asymptotically nonexpansive mappings in $q$-hyperconvex $T_0$-quasi-metric spaces, Adv. Fixed Point Theory 3 (2013), 135–140.

56. H.-P.A. Künzi and O. Olela Otafudu, $q$-Hyperconvexity and fixed point theorems, J. Funct. Spaces Appl. 2012 (2012), Art. ID 765903, 18 pp.

57. H.-P.A. Künzi and O. Olela Otafudu, The ultra-quasi-metrically injective hull of a $T_0$-ultra-quasi-metric space, Appl. Categ. Structures 21 (2013), 651–670.

58. E. Kemajou, H.-P.A. Künzi, and O. Olela Otafudu, The Isbell-hull of a di-space, Topology Appl. 159 (2012), 2463–2475.

59. H.-P.A. Künzi and O. Olela Otafudu, The scale of a quasi-uniform space, Acta Math. Hungar. 127 (2010), 239–259.

Conference Proceedings

1. H.-P.A. Künzi and O. Olela Otafudu, The versatile Hausdorff hyperspace construction, in: Applied Topology: Recent Progress for Computer Science, Fuzzy Mathematics and Economics, Proc. WIAT'09, Palma de Mallorca, Spain (2009), pp. 17–27.

2. H.-P.A. Künzi and O. Olela Otafudu, Injectivity in $T_0$-ultra-quasi-metric spaces, in: Applied Topology: Recent Progress for Computer Science, Fuzzy Mathematics and Economics, Proc. WIAT'12, Castellón, Spain (2012), pp. 93–105.

Books and Monographs

1. O. Olela Otafudu, The Scale of a Quasi-Uniform Space, LAP Lambert Academic Publishing, ISBN: 978-3-8433-8562-6, 2010.

Theses and Dissertations

1. O. Olela Otafudu, Convexity in Quasi-Metric Spaces, PhD Thesis in Mathematics, University of Cape Town, 2012.

2. O. Olela Otafudu, The Scale of a Quasi-Uniform Space, MSc Thesis in Mathematics, University of Cape Town, 2009.

3. O. Olela Otafudu, Application of Discrete and Continuous Models to the Calculation of Real Options, Honours Essay in Applied Mathematics, University of Kinshasa, 2004.