def ns.succ_inj

bend-osdev-word64@0.1.1.0 · proof_shift.bend:48

import Base

48def ns.succ_inj(-a: Nat, -b: Nat, e: {1n+a == 1n+b : Nat}) -> {a == b : Nat}:
49  Equal.cong(Nat, Nat, z => ns.pred(z), 1n+a, 1n+b, e)