Source: wikibot/weyl-s-inequality
= Weyl's inequality
{wiki=Weyl's_inequality}
Weyl's inequality is a result in linear algebra and matrix theory concerning the eigenvalues of Hermitian (or symmetric) matrices. It relates the eigenvalues of the sum of two Hermitian matrices to the eigenvalues of the individual matrices. Let's denote two Hermitian matrices \\( A \\) and \\( B \\).