Schur–Horn theorem (source code)

= Schur–Horn theorem
{wiki=Schur–Horn_theorem}

The Schur–Horn theorem is a result in linear algebra that relates eigenvalues of Hermitian matrices (or symmetric matrices, in the real case) to majorization. The theorem establishes a connection between the eigenvalues of a Hermitian matrix and the partial sums of these eigenvalues as they relate to the concept of majorization.