A general approach to the study of Chebyshev subspaces in \(L_ 1\)- approximation of continuous functions
The author considers the problem of characterising those subspaces of C(K,X), where K is a compact subject of \(R^ n\) and X is a real Banach space, that have the following property: there is a unique best \(L^ 1\) approximation with respect to all positive weights. Some applications of the main results are given.
scientific article; zbMATH DE number 4028074
scientific article