New accuracy estimates for pseudoskeleton approximations of matrices
Николай Леонидович Замарашкин, Alexander Osinsky · Doklady Mathematics · 2016
A priori accuracy estimates for low-rank approximations using a small number of rows and columns of the initial matrix are proposed. Unlike in the existing methods of pseudoskeleton approximation, this number is larger than the rank of approximation, but the estimates are substantially more accurate than those known previously.