fact: Definition cV_of_nat (n i : nat) : 'cV['F_2]_n := (rV_of_nat n i)^T.
imports: mathcomp(ssreflect ssrfun ssrbool eqtype ssrnat seq choice) mathcomp(fintype tuple) BinPos BinNat PArith ssr_ext mathcomp(bigop zmodp ssralg matrix) ssralg_ext f2