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Zap. Nauchn. Sem. POMI, 1996 Volume 232, Pages 134–140 (Mi znsl3682)

The Gelfand and Bernstein widths of some classes of analytic functions. II

O. G. Parfenov

Pskov State Pedagogical Institute

Abstract: The Gelfand widths of the unit ball of $H^2(\nu)$ (the weighted Hardy space) with respect to the metric of the space $L_\infty(T_r)$ are considered ($T_r$ being the circle of radius $r$ centered at the origin), as well as the Bernstein widths of the unit ball of $H^\infty$ with respect to the metric of the space $L_2(T_r,\mu)$. The asymptotic formulas for the widths in the question are established for arbitrary measures $\nu,\mu$. Bibl. 5 titles.

UDC: 517.43+517.51

Received: 13.11.1995


 English version:
Journal of Mathematical Sciences (New York), 1998, 92:1, 3630–3634

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© Steklov Math. Inst. of RAS, 2024