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math.FA2022
Linear preservers of copositive and completely positive matrices
Sachindranath Jayaraman, Vatsalkumar N. Mer
The objective of this manuscript is to understand the structure of an invertible linear map on the space of real symmetric matrices that leaves invariant the closed…
math.SP2022
Hoffman-Wielandt type inequality for block companion matrices of certain matrix polynomials
Pallavi . B, Shrinath Hadimani, Sachindranath Jayaraman
Matrix polynomials with unitary/doubly stochastic coefficients form the subject matter of this manuscript. We prove that if is a quadratic matrix polynomial whose coefficien…