Journal or Book Title
JP Journal of Algebra, Number Theory and Applications
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
Pushpa Publishing House
Driessel, Kenneth; Hentzel, Irvin R.; and So, Wasin, "On Preserving Structured Matrices Using Double Bracket Operators: Tridiagonal and Toeplitz Matrices" (2001). Mathematics Publications. 156.