Sharp estimates of the widths of convolution classes in the space \(C_ 2\eta\)

zbMath0709.41524MaRDI QIDQ921360

Alexander Kushpel

Publication date: 1989

Published in: Proceedings of the Steklov Institute of Mathematics (Search for Journal in Brave)

Mathematics Subject Classification ID

Convolution as an integral transform (44A35) Approximation by arbitrary nonlinear expressions; widths and entropy (41A46)