Estimate of approximate characteristics for classes of functions with bounded mixed derivative
The authors supplement an earlier paper of theirs [Math. Notes 56, No. 5, 1137-1157 (1994; Zbl 0836.41008)] by establishing lower bounds for the \(\varepsilon\)-entropy numbers and Kolmogorov widths of additional classes of spaces of functions of several variables having bounded mixed derivatives.
spaces of functions of several variables having bounded mixed derivatives
scientific article; zbMATH DE number 921645