When are Topologically Equivalent Orthogonal Transformations Linearly Equivalent? William Pardon, W.-c. Hsiang (1982) Inventiones mathematicae
When powers of a matrix coincide with its Hadamard powers Roman Drnovšek (2015) Special Matrices We characterize matrices whose powers coincide with their Hadamard powers.
Wiener-Hopf factorization for matrices Martin T. Barlow, L. C. G. Rogers, David Williams (1980) Séminaire de probabilités de Strasbourg