law succ_sub_succ

bend-mathlib@0.8.1.0 · nat.bend:646

import Base

646# Subtracting successors: (n + 1) - (m + 1) = n - m.
647law succ_sub_succ:
648  for -n: Nat
649  for -m: Nat
650  {Nat.sub(1n+n, 1n+m) == Nat.sub(n, m) : Nat}