Arith.sub_cancel_l: def of bend-collections-laws-crypto@1.0.0.0
Import: import bend-collections-laws-crypto@1.0.0.0/proofs/math/natural/arith.bend as Arith
Lines 97-102 of bend-collections-laws-crypto@1.0.0.0/proofs/math/natural/arith.bend: https://jend.leeeet.dev/read.txt?path=bend-collections-laws-crypto@1.0.0.0/proofs/math/natural/arith.bend&start_line=97&end_line=102

import Base

def sub_cancel_l(+c: Nat, +a: Nat, +b: Nat) -> {Nat.sub(Nat.add(c, a), Nat.add(c, b)) == Nat.sub(a, b) : Nat}:
  match c:
    case 0n:
      {==}
    case 1n+ +cp:
      sub_cancel_l(cp, a, b)

Uses (3):
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Nat
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Nat.add
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Nat.sub