Sergei Vladimirovich Konjagin

Sergei Wladimirowitsch Konjagin , Russian Серге́й Владимирович Конягин , English transcription Sergey Konyagin, (born April 25, 1957 in Saratow ) is a Russian mathematician who studies analysis.

Konjagin won gold medals at the International Mathematical Olympiads in 1972 and 1973, each with full points. He studied at Lomonossow University and received his doctorate from Sergei Borissowitsch Stetschkin (approximate properties of sets in normalized linear spaces, Russian). In 1989 he completed his habilitation ( Russian doctorate , with the dissertation: The representation of functions through trigonometric series (Russian)). He is a professor at Lomonosov University and a senior scientist at the Steklov Institute in Moscow.

He is particularly concerned with harmonic analysis, character sums with applications in analytical number theory, best approximation of functions and with polynomials. In 1981 he proved a conjecture by John Edensor Littlewood about a lower bound of averaged exponential sums.

In 1990 he received the Salem Prize . In 2006 he was invited speaker at the International Congress of Mathematicians in Madrid ( Almost everywhere convergence and divergence of Fourier series ). In 2012 he became a Fellow of the American Mathematical Society . He is a corresponding member of the Russian Academy of Sciences .

Fonts

On a problem of Littlewood. In: Mathematics of the USSR - Izvestija. Volume 18, No. 2, 1981, pp. 205-225
with KA Sevastyanov: A bound, in terms of its volume, for the number of vertices of a convex polyhedron when the vertices have integer coordinate. In: Functional Analysis and its Applications. Volume 18, No. 1, 1984, pp. 11-13, doi : 10.1007 / BF01076356 , (a lower limit was first derived from George Andrews in 1963).
with Igor E. Shparlinski : Character sums with exponential functions and their applications (= Cambridge Tracts in Mathematics. 136). Cambridge University Press, Cambridge et al. 1999, ISBN 0-521-64263-9 .
with Ben Green : On the Littlewood problem modulo a prime. In: Canadian Journal of Mathematics . Volume 61, No. 1, 2009, pp. 141-164, Arxiv .

Web links

mathnet.ru

Individual evidence

personal data
SURNAME	Konjagin, Sergei Wladimirowitsch
ALTERNATIVE NAMES	Konyagin, Sergey; Конягин, Серге́й Владимирович
BRIEF DESCRIPTION	Russian mathematician
DATE OF BIRTH	April 25, 1957
PLACE OF BIRTH	Saratov

[1] Konyagin, IMO

[2] Sergei Wladimirowitsch Konjagin in the Mathematics Genealogy Project (English)

[3] Entry in the Function Theory Department at the Steklow Institute , with photo

[4] Mathnet.ru .