fact: Definition eq_ex2_rect_ex_intro2_l {A : Prop} {P Q : A -> Prop} {u1 u2 u3 v} (R : _ -> Type) (f : forall p q r, R (eq_ex_intro2_l (P:=P) (Q:=Q) u1 u2 u3 v p q r)) : forall p, R p := eq_ex2_rect R f.
imports: Notations Ltac