Persons: Stupin, Denis Leonidovich

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Stupin, Denis Leonidovich

Candidate of physico-mathematical sciences (2005)

Speciality:

01.01.01 (Real analysis, complex analysis, and functional analysis)

Birth date:

2.12.1977

E-mail:

Keywords:

Coefficient problem, estimates of modules of Taylor coefficient, Krzyz problem, bounded nonvanishing holomorphic functions.

UDC:

517.54

MSC:

Subject:

Bounded nonvanishing functions, Krzyz problem.

Main publications:

Stupin D.L., “Tochnye otsenki koeffitsientov v probleme Kzhizha”, Primenenie funktsionalnogo analiza v teorii priblizhenii, 2010, 52–60
Stupin D.L., “Dokazatelstvo lokalnogo printsipa podchineniya i lokalnoi spravedlivosti gipotezy Kshizha”, Primenenie funktsionalnogo analiza v teorii priblizhenii, 2008
Stupin D.L., Sheretov V.G., “Dokazatelstvo lokalnoi gipotezy Kshizha”, Vestnik TvGU. Seriya: Prikladnaya matematika, 2005

	Publications in Math-Net.Ru	Citations
	2025
1.	D. L. Stupin, “The Krzyz conjecture and convex univalent functions”, Zhurnal SVMO, 27:1 (2025), 81–96
2.	D. L. Stupin, “Sharp estimate of the third coefficient for bounded non-vanishing holomorphic functions with real coefficients”, Russian Universities Reports. Mathematics, 30:149 (2025), 79–92
	2024
3.	D. L. Stupin, “A new proof of the Krzyz conjecture for $n=3$”, Izv. Saratov Univ. Math. Mech. Inform., 24:3 (2024), 342–350	1
4.	D. L. Stupin, “A new method of estimation of moduli of initial Taylor coefficients on the class of bounded non-vanishing functions”, Russian Universities Reports. Mathematics, 29:145 (2024), 98–120	2
	2023
5.	D. L. Stupin, “The coefficient problem for bounded functions and its applications”, Russian Universities Reports. Mathematics, 28:143 (2023), 277–297	3

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