Abstract

We consider proof certificates for identities of rectangular matrices. To automate their construction, we introduce an algebraic framework and supply explicit algorithms relying on non-commutative Grobner bases. We address not only verification, but also exploration and reasoning towards establishing new identities and even proving mathematical properties. Especially Grobner-driven elimination theory navigates us to insightful conclusions. We present several applications, that is efficiently formalized proofs for important identities of matrices: cancellation properties of triple products with Moore–Penrose pseudoinverses, a generalized Sherman–Morrison–Woodbury formula and an automated derivation of feedback loops in the famous Youla controller parametrization from control theory.

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