On Preserving Structured Matrices Using Double Bracket Operators: Tridiagonal and Toeplitz Matrices
Kenneth R. Driessel, Irvin Roy Hentzel, Wasin So · Iowa State University Digital Repository (Iowa State University) · 2001
In the algebra of square matrices over the complex numbers, denotes Two problems are solved: (1) Find all Hermitian matrices M which have the following property: For every Hermitian matrix A, if A is tridiagonal, then so is (2) Find all Hermitian matrices M which have the following property: For every Hermitian matrix A, if A is Toeplitz, then so is