Natural.inv_fin: def of bend-collections@1.0.0.0
Import: import bend-collections@1.0.0.0/src/math/natural.bend as Natural
Lines 314-321 of bend-collections@1.0.0.0/src/math/natural.bend: https://jend.leeeet.dev/read.txt?path=bend-collections@1.0.0.0/src/math/natural.bend&start_line=314&end_line=321

import Base

def inv_fin(+m: Nat, bz: Bezout) -> Result<&2, &2, MathError, Nat>:
  match bz:
    case BZ{1n, s}:
      Done{Nat.mod(s, m)}
    case BZ{0n, s}:
      Fail{NotInvertible{}}
    case BZ{2n+g, s}:
      Fail{NotInvertible{}}

Uses (5):
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Nat
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Nat.mod
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Result
  https://jend.leeeet.dev/definition.txt?path=bend-collections@1.0.0.0/src/math/natural.bend&name=Bezout
  https://jend.leeeet.dev/definition.txt?path=bend-collections@1.0.0.0/src/math/natural.bend&name=MathError