Geometric multiplicity margin for a submatrix
González de Durana García, José María
Gracia Melero, Juan Miguel
MetadataShow full item record
Linear algebra and its applications 349(1-3) : 77-104 (2002)
Let G be a square complex matrix with less than k nonconstant invariant factors. We find a complex matrix that gives an optimal approximation to G among all possible matrices that have more than or equal to k invariant factors, obtained by varying only the entries of a bottom right submatrix of G.