fact: Definition QuotientRing_ind_hprop {R : CRing} {I : Ideal R} (P : R / I -> Type) `{forall x, IsHProp (P x)} (c : forall (x : R), P (rng_quotient_map I x)) : forall (r : R / I), P r := Quotient_ind_hprop _ P c.
imports: WildCat Algebra.Congruence Algebra.AbGroups Classes.interfaces.abstract_algebra Algebra.Rings.CRing Algebra.Rings.Ideal