UniqueProofs.sum_zero: def of bendtorch-core@0.1.0.0
Import: import bendtorch-core@0.1.0.0/src/shape/unique_proofs.bend as UniqueProofs
Lines 41-46 of bendtorch-core@0.1.0.0/src/shape/unique_proofs.bend: https://jend.leeeet.dev/read.txt?path=bendtorch-core@0.1.0.0/src/shape/unique_proofs.bend&start_line=41&end_line=46

import Base

def sum_zero(+a: Nat, -b: Nat, equal: {Nat.add(a, b) == 0n : Nat}) -> {a == 0n : Nat}:
  match a:
    case 0n:
      {==}
    case 1n+p:
      Empty.absurd({1n+p == 0n : Nat}, succ_zero(Nat.add(p, b), equal))

Uses (4):
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Empty.absurd
  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=bendtorch-core@0.1.0.0/src/shape/unique_proofs.bend&name=succ_zero