fact: Definition delta_seqmx m n i j : hseqmx m n := mkseqmx_ord (fun (i0 : 'I_m) (j0 : 'I_n) => if (eqn i0 i) && (eqn j0 j) then 1%C else 0%C).
imports: mathcomp(ssreflect ssrfun ssrbool eqtype ssrnat div seq ssralg) mathcomp(path choice fintype tuple finset bigop poly matrix mxpoly) CoqEAL(hrel param refinements trivial_seq)