law zero_add_sym

bend-mathlib@0.8.1.0 · nat.bend:3839

import Base

3839# Zero is a left identity for addition: 0 + x = x, reversed to rewrite toward the simple side.
3840law zero_add_sym:
3841  for -x: Nat
3842  {x == Nat.add(0n, x) : Nat}