Certification of Proving Termination of Term Rewriting by Matrix Interpretations.

We develop a Coq formalization of the matrix interpretation method, which is a recently developed, powerful approach to proving termination of term rewriting. Our formalization is a contribution to the CoLoR project and allows to automatically certify matrix interpretation proofs produced by tools for proving termination. Thanks to this development the combination of CoLoR and our tool, TPA, was the winner in 2007 in the new certified category of the annual Termination Competition. [ABSTRACT FROM AUTHOR]