def test_sdm_nf_mora(): f = sdm_from_dict({(1, 2, 1, 1): QQ(1), (1, 1, 2, 1): QQ(1), (1, 0, 2, 1): QQ(1), (1, 0, 0, 3): QQ(1), (1, 1, 1, 0): QQ(1)}, grlex) f1 = sdm_from_dict({(1, 1, 1, 0): QQ(1), (1, 0, 2, 0): QQ(1), (1, 0, 0, 0): QQ(-1)}, grlex) f2 = sdm_from_dict({(1, 1, 1, 0): QQ(1)}, grlex) (id0, id1, id2) = [sdm_from_dict({(i, 0, 0, 0): QQ(1)}, grlex) for i in range(3)] assert sdm_nf_mora(f, [f1, f2], grlex, QQ, phantom=(id0, [id1, id2])) == \ ([((1, 0, 2, 1), QQ(1)), ((1, 0, 0, 3), QQ(1)), ((1, 1, 1, 0), QQ(1)), ((1, 1, 0, 1), QQ(1))], [((1, 1, 0, 1), QQ(-1)), ((0, 0, 0, 0), QQ(1))]) assert sdm_nf_mora(f, [f2, f1], grlex, QQ, phantom=(id0, [id2, id1])) == \ ([((1, 0, 2, 1), QQ(1)), ((1, 0, 0, 3), QQ(1)), ((1, 1, 1, 0), QQ(1))], [((2, 1, 0, 1), QQ(-1)), ((2, 0, 1, 1), QQ(-1)), ((0, 0, 0, 0), QQ(1))]) f = sdm_from_vector([x*z, y**2 + y*z - z, y], lex, QQ, gens=[x, y, z]) f1 = sdm_from_vector([x, y, 1], lex, QQ, gens=[x, y, z]) f2 = sdm_from_vector([x*y, z, z**2], lex, QQ, gens=[x, y, z]) assert sdm_nf_mora(f, [f1, f2], lex, QQ) == \ sdm_nf_mora(f, [f2, f1], lex, QQ) == \ [((1, 0, 1, 1), QQ(1)), ((1, 0, 0, 1), QQ(-1)), ((0, 1, 1, 0), QQ(-1)), ((0, 1, 0, 1), QQ(1))]
def contains(I, f): S = [sdm_from_vector([g], igrlex, QQ, gens=gens) for g in I] G = sdm_groebner(S, sdm_nf_mora, igrlex, QQ) return sdm_nf_mora(sdm_from_vector([f], lex, QQ, gens=gens), G, lex, QQ) == sdm_zero()
def _contains(self, x): from diofant.polys.distributedmodules import sdm_zero, sdm_nf_mora return sdm_nf_mora(self.ring._vector_to_sdm(x, self.order), self._groebner(), self.order, self.ring.domain) == \ sdm_zero()