On the domain of constancy of the sign of a harmonic function in the unit disk with additional conditions on the boundary

DOI10.1134/S1061920823010077zbMath1512.42002OpenAlexW4360977555MaRDI QIDQ6042606

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Publication date: 3 May 2023

Published in: Russian Journal of Mathematical Physics (Search for Journal in Brave)

Full work available at URL: https://doi.org/10.1134/s1061920823010077

zbMATH Keywords

sine series with monotonic coefficients

Mathematics Subject Classification ID

Summability and absolute summability of Fourier and trigonometric series (42A24) Trigonometric polynomials, inequalities, extremal problems (42A05) Trigonometric series of special types (positive coefficients, monotonic coefficients, etc.) (42A32)

Cites Work

• Estimates of the least positive root of the sum of a sine series with monotone coefficients
• Examples of trigonometric series with non-negative partial sums
• On Sine Series with Monotone Coefficients
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