fact: Definition msigT2_of_msig2 (A : Type) (P Q : A -> Prop) (X : msig2 P Q) : msigT2 P Q := mexistT2 P Q (mproj1_msig (msig_of_msig2 X)) (mproj2_msig (msig_of_msig2 X)) (mproj3_msig X).
imports: Notations Datatypes Logic