proposition: Fact Zp_mult_one_r x : x ⊗ Op = x.
proof: Proof. rewrite Zp_mul_comm, Zp_mult_one; auto. Qed.
imports: Arith Lia ZArith List Permutation Eqdep_dec Undecidability.Shared.Libs.DLW.Utils(utils_tac utils_list gcd prime binomial sums php) Undecidability.H10.ArithLibs(matrix)