fact: Definition angbind `{m : PMonad} {a j q} (f : a → m q j) : m (a ::= j) :→ m q := pextend ((λ _ x, match x with V a => f a end) : (a ::= j) :→ m q).
imports: Hask.Ltac Coq.Program.Equality Coq.Unicode.Utf8 FunctionalExtensionality Iso Tuple