Dr CA Agyingi

Qualifications

• Ph.D. Asymmetric Topology,  University of Cape Town (UCT), 2014 South Africa,
• PGDS Abstract Algebra, Stellenbosch University, 2012 South Africa,
• PGD in Mathematics, AUST Abuja, 2010, Nigeria,
• B.Sc.(Hons) in Mathematics, University of Buea, 2006, Cameroon.

NRF Rating

Currently teaching

• Real Analysis,
• Functional Analysis,
• Topology.

Field of Specialisation

• Asymmetric Topology with focus on quasi-metric spaces and quasi-uniform spaces
• Asymmetric Functional Analysis

Journal articles

1. C.A. Agyingi and Y.U. Gaba, $q^\lambda$-hyperconvexity in quasi-metric spaces, Afrika Matematica, 30(3-4) (2019), 399-412.
2. Y.U. Gaba, C.A. Agyingi, B.S. Choudhury, and P. Maity, Generalized Banach Contraction Mapping Principle in Generalized Metric Spaces with a Ternary Relation, Surveys in Mathematics and its Applications 14(2019), 159--171.
3. C.A. Agyingi, When separability of the space of ultra-extremal functions is preserved, Quaestiones Matematicae, 42(6)(2019), 781-801.
4. .U. Gaba and C.A. Agyingi, n-Tuple fixed point in phi-ordered G-metric spaces, Journal of Nonlinear Analysis and Application (2018), accepted.
5. C.A. Agyingi, On di-injective $T_0$-quasi-metric spaces, Topology and its Applications, 228(2017), 371-381.
6. C.A. Agyingi, Extensions of ultrametric spaces, Topology Proceedings, 47(2016), 207-220.
7. C.A. Agyingi, Supseparability of the space of minimal function pairs, Topology and its Applications, 194(2015), 212-227.
8. C.A. Agyingi, P. Haihambo and H.-P.A. Kunzi, Tight extensions of T_0-quasi-metric spaces, Ontos-Verlag: Logic, Computations, Hierarchies (2014), 9-22.
9. C.A. Agyingi, P. Haihambo and H.-P.A. Kunzi, Endpoints in T_0-quasi-metric spaces, Topology and its Applications 168(2014), 82-93.
10. C.A. Agyingi, P. Haihambo and H.-P.A. Kunzi, Endpoints in T_0-quasi-metric spaces, II, Abstract and Applied Analysis, (2013), article ID 539573, http://dx.doi.org/10.1155/2013/539573.
11. C.A. Agyingi, P. Haihambo and H.-P.A. Kunzi, Tight extensions and endpoints of T_0-quasi-metric spaces, Proceedings of the Workshop in Applied Topology, WiAT'13, May 2013, pp. 43-52.
12. C.A. Agyingi, Hyperconvex hulls in categories of quasi-metric spaces, Ph.D. thesis, University of Cape Town, , (2014).

Paper presentations

1. Endpoints in T_0-quasi-metric spaces, a talk given at the 62nd Annual Congress of the South African Mathematical Society, 2-4 December 2019 at the University of Cape Town, Cape Town, Republic of South Africa.

2. The Hausdorff-measure of non q-hyperconvex for T_0-quasi-metric spaces, a talk given at the 34th Summer Conference on Topology and its Applications, 1-4 July 2019 at the University of the Witwatersrand, Johannesburg, Republic of South Africa.

3. The Hausdorff measure of non q-hyperconvexity for a bicomplete T_0-quasi-metric space, a talk given at the Topology, Algebra, Analysis, and Geometry Conference (TAAG), 16-19 September 2018 at the University of KwaZulu-Natal, Durban, South Africa.

4. International Congress of Mathematicians, 1-9 August 2018 at Rio de Janeiro, Brazil.

5. More on externally q-hyperconvex T_0-quasi-metric spaces, at talk given at the 33rd Summer Conference on Topology and its Applications, 17-20 July 2018 at the Western Kentucky University, Bowling Green, KY, USA.

6. On di-injective T_0-quasi-metric spaces, a talk given at the 32nd Summer Conference on Topology and its Applications, 27-30 June 2017 at the  University of Dayton, Ohio, USA.

7. Di-injectivity in T_0-quasi-metric spaces, a talk given at the 59th Annual Congress of the South African Mathematical Society, 2-4 November 2016 at the University of the Western Cape, Cape Town, South Africa.

8. Lambda- hyperconvexity in quasi-metric spaces, a talk given at the 31st Summer Conference on Topology and its Applications, 2-4 August 2016 at the University of Leicester, Leicester, England.

9. When the ultrametrically injective hull of an ultrametric space is separable, a talk given at the 2015 Texas Geometry and Topology Conference, 6-8 November 2015 at Rice University, Houston, TX, USA.

10. Tight extensions of T_0-quasi-metric spaces, a talk given at the Topology, Algebra, Analysis, and Geometry Conference, 8-11 September 2015 at the North-West University, Mafikeng, South Africa.

Professional positions, fellowships & awards

• Member of the South African Mathematical Society
• World Bank scholarship for PGD studies at AUST Abuja
• AIMS-Victor-Rothschild Scholarship for PGDS studies at Stellenbosch University
• AIMS half-bursary for Ph.D. studies at the University of Cape Town
• University of Cape Town International student Ph.D. bursary for 2014
• NRF-DST Innovation doctoral scholarship for 2014

Other

Professional Positions:

• Reviewer for applications for funding from the National Research Foundation of South Africa in 2014. 

• I do peer review for the following ISI journals: Quaestiones Mathematicae of the South African Mathematical Society, Afrika Matematika of the African Mathematical Union, Fuzzy Sets and Systems. 

• I write reviews of published articles for: Mathematical Reviews of the American Mathematical society and ZbMath of the European Mathematics Society, FIZ Karlsruhe and the Heidelberg Academy of Sciences.

Google Scholar: https://scholar.google.com/citations?user=ZBrJjHMAAAAJ&hl=en&oi=ao

Scopus Profile: https://www.scopus.com/authid/detail.uri?authorId=55857732100