Matyáš Lerch (1860-1922) (original) (raw)

Acta Universitatis Carolinae. Mathematica et Physica

1993

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Professor Vladislav V. Kravchenko: A Mathematician and a Friend

Journal of Mathematical Sciences, 2023

His recent breakthrough research is related to methods of solution of direct and inverse spectral problems which has led to new representations for solutions of linear ordinary differential equations with variable coefficients, to new representations for associated transformation (transmutation) operators, and eventually to simple, direct and most effective computational algorithms for solving direct and inverse spectral and scattering problems on finite and infinite intervals for regular and singular Sturm-Liouville equations. The problems which have always been considered as computationally challenging, all at once became quite simple and treatable within the unified approach developed by V. Kravchenko. The first work by V. Kravchenko in this direction was his paper of 2008 [1], in which with the aid of the pseudo-analytic (or generalized analytic) function theory he developed what is now called the SPPS (spectral parameter power series) representation for solutions of the Sturm-Liouville equation. In fact, that work showed a simple and elegant way for computing Taylor coefficients of the solution considered as an entire function with respect to the spectral parameter. In a subsequent work developed jointly with R. Michael Porter [2] it was shown that this new representation led to a numerical method for solving direct Sturm-Liouville problems and as a consequence to an approach for solving a series of real-world This review article is to honor the work of Professor Vladislav V. Kravchenko, a Senior Researcher in the research mathematical center CINVESTAV (Center for Research and Advanced Study, Mexico), on the occasion of his 55th birthday. It contains some biographical notes about V. Kravchenko, as well as a bird's-eye view on his research during the last decades.

In memory of Dr.Sc.Math. Professor RIMSHANS JANIS STANISLAVOVICH (24.06.1951–11.01.2015)

Janis S. Rimshans, Doctor of Mathematical Sciences (Dr.Sc.Math.), Professor, Latvian mathematician and physicist, rector of the Liepaja University, Director of the Institute of Mathematical Sciences and Information Technology, Head of the "Mathematical modeling hydrodynamics" Laboratory in the Institute of Mathematics and Computer Sciences of the University of Latvia, died January 11, 2015. Professor Janis S. Rimshans was a very pure soul. His main trait was boundless kindness to everything: to the people, to animals, to plants and to nature in general. This trait was so strong in Janis S. Rimshans that it was impossible to stay "unpurified" while talking with him even for 10- 15 minutes, no matter what state of mind you had before. Janis S. Rimshans vainly dreamed for learning to say "no" and refuse people if they approached him with requests, fulfilling of which often caused an obvious material and/or moral damage both personally and indirectly to Jan...

Promarz M. Tamrazov: mathematical ideas and results

P.M. Tamrazov and his wife Janna Kiev, 2013 -p. 8/58 He was an active participant on many international congresses and conferences. He was awarded by many grants. P.M. Tamrazov was a member of ISAAC Board (1998 -2002) and a member of ISAAC Award Committee (1999). Kiev, 2013 -p. 9/58 P.M. Tamrazov is the author of more than 200 research papers and of monograph "Smoothnesses and polynomial approximations", Naukova Dumka, Kiev, 1975. He was the supervisor of 13 Ph D and 4 Doctor of Sciences theses.