Sharp estimates of approximation in \(L_ p\) by functions of the form \(\phi (x)+\psi (y)\)

DOI10.1007/BF01060573zbMath0709.41027MaRDI QIDQ921325

S. A. Pichugov

Publication date: 1989

Published in: Ukrainian Mathematical Journal (Search for Journal in Brave)

zbMATH Keywords

sharp estimatesmixed modulus of continuityperiodic bivariate function

Mathematics Subject Classification ID

Trigonometric approximation (42A10) Multidimensional problems (41A63) Rate of convergence, degree of approximation (41A25)

Cites Work

• The spaces \(L^ p\), with mixed norm
• \(L^p\) inequalities
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