On the construction of linearly independent vectors with variable components
Given an \(n\times h\) matrix of \(C^{\mu}\)-functions having rank \(h<n\) on a closed interval, the author proves that it is a submatrix of an \(n\times n\) matrix of \(C^{\mu}\)-functions having rank n on the interval.
scientific article; zbMATH DE number 3855298