ProofBsearch.bq.sub_cancel: def of bend-osdev-algo@0.1.0.0
Import: import bend-osdev-algo@0.1.0.0/proof_bsearch.bend as ProofBsearch
Lines 289-294 of bend-osdev-algo@0.1.0.0/proof_bsearch.bend: https://jend.leeeet.dev/read.txt?path=bend-osdev-algo@0.1.0.0/proof_bsearch.bend&start_line=289&end_line=294

import Base

def bq.sub_cancel(l: Nat, -s: Nat, -t: Nat) -> {Nat.sub(Nat.add(l, s), Nat.add(l, t)) == Nat.sub(s, t) : Nat}:
  match l:
    case 0n:
      {==}
    case 1n+p:
      bq.sub_cancel(p, s, t)

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