proposition: Lemma FAx_00: GA 0 0 = 1.
proof: Proof. by move:(GAR_e 0); rewrite Zeckp_0 /GR GRr_0n. Qed.
imports: mathcomp(ssreflect ssrfun ssrbool eqtype ssrnat) mathcomp(seq path fintype div bigop binomial) mathcomp(prime finset ssralg ssrnum ssrint)