Tel: +2712 420-2819 Position: Associate Professor |
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Research Interests: Nonlinear PDE's and nonlinear theories of generalized functions; convergence spaces and applications; analysis of real and interval-valued functions; vector lattices and ordered linear topological spaces; non-Archimedean mathematics Publications over the past five years:Journal articles
de Jeu M and van der Walt JH, The order bidual of C(X) for a realcompact space. To appear in Quaestiones Mathematicae W van Amstel and JH van der Walt, Limits of vector lattices. Journal of Mathematical Analysis and Applications 531(2024); 127770 O' Brien M, Troitsky V and van der Walt JH, Net convergence structures with applications to vector lattices. Quaestiones Mathematicae 46(2)(2023), 243-280 Agbebaku DF and van der Walt JH, Differential chain of Algebras of Generalized Functions. Novi Sad Journal of Mathematics 52(1)(2022), 39-77 van der Walt JH, Category measures, the dual of C(K)δ and hyper-Stonean spaces. Proceedings of the American Mathematical Society 149(11)(2021), 4841-4852 de Jeu M, van der Walt JH, On order continuous duals of vector lattices of continuous functions. Journal of Mathematical Analysis and Applications 479(2019), 581–607 Agbebaku DF and van der Walt JH, Differential algebras of generalised functions with dense singularities. Quaestiones Mathematicae 41(2)(2018), 283–301 van der Walt JH, The universal completion of C(X) and unbounded order convergence. Journal of Mathematical Analysis and Applications 460(1)(2018), 76–97 van der Walt JH, Vector-valued interval functions and the Dedekind completion of C(X,E), Positivity 21(2017), 1143–1159 Agbebaku DF and van der Walt JH, The Order Completion Method: A differential-algebraic representation. Novi Sad Journal of Mathematics 47(1)(2017), 17-46 van der Walt JH, A closed graph theorem for order bounded operators. Quaestiones Mathematicae 39(2)(2016), 167-178 van der Walt JH, Linear and quasi-linear spaces of set-valued maps. Computers and Mathematics with Applications 68(2014), 1006-1015 van der Walt JH, The order completion method for system of nonlinear PDEs: Solutions of initial value problems. Abstract and Applied Analysis, (2013), Article ID 739462, 12 pages Khrennikov A, Shelkovich V and van der Walt JH Measure-free viewpoint on p-adic and adelic wavelets. p-Adic and Ultrametric Analysis and its Applications, 5(3)(2013), 204-217 Anguelov R and van der Walt JH Algebraic and topological structure of some spaces of set-valued maps. Computers and Mathematics with Applications, 66(2013), 1643-1654 Khrennikov AY, Shelkovich VM and van der Walt JH, Adelic multiresolution analysis construction of wavelet bases and pseudo-differential operators. Journal of Fourier Analysis and Applications, 19(6)(2013), 1323-1358 van der Walt JH, The linear space of Hausdorff continuous interval functions. Biomath 2(2)(2013), Article ID 1311261, 6 pages van der Walt JH, Convergence of sequences of semi-continuous functions. Journal of Mathematical Analysis and Applications, 388(2012), 739-752
Conference Proceedings Van der Walt JH The Riesz Space of Minimal Usco Maps. Ordered Structures and Applications Positivity VII (Zaanen Centennial Conference), Editors: de Jeu M, de Pagter B, van Gaans O, Veraar M. 22-26 July 2013, Leiden, the Netherlands. Birkauser (2016)481 - 502 Book Chapters Van der Walt JH Proceedings of the conference Positivity X, 8 to 12 July 2019, Pretoria, South Africa. Published in Birkhauser's series of books Trends in Mathematics Van der Walt JH Representations of the Dedekind completions of spaces of continuous functions, Positivity and Noncommutative Analysis Festschrift in Honour of Ben de Pagter on the Occasion of his 65th Birthday Editors: Buskes, G., de Jeu, M., Dodds, P., Schep, A., Sukochev, F., van Neerven, J., Wickstead, A. (Eds.). Van der Walt JH Representations of the Dedekind Completions of Spaces of Continuous Functions Positivity and Noncommutative Analysis (2019) 563-581 |
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