fact: Definition mxtens_unindex m n k := (Ordinal (@mxtens_index_proof1 m n k), Ordinal (@mxtens_index_proof2 m n k)).
imports: mathcomp.ssreflect.ssreflect mathcomp(ssrfun ssrbool eqtype ssrnat seq choice fintype) mathcomp(bigop ssralg matrix zmodp div)