fact: Definition minor (m n p : nat) (f : 'I_p -> 'I_m) (g : 'I_p -> 'I_n) (A : 'M[R]_(m,n)) := \det (submatrix f g A).
imports: mathcomp(ssreflect ssrfun ssrbool eqtype ssrnat div seq path ssralg) mathcomp(fintype perm choice finfun matrix bigop zmodp poly mxpoly)