Lemire.dbl0: def of bend-collections-laws-math@1.0.0.0
Import: import bend-collections-laws-math@1.0.0.0/proofs/math/random/lemire.bend as Lemire
Lines 493-498 of bend-collections-laws-math@1.0.0.0/proofs/math/random/lemire.bend: https://jend.leeeet.dev/read.txt?path=bend-collections-laws-math@1.0.0.0/proofs/math/random/lemire.bend&start_line=493&end_line=498

import Base
import bend-collections-laws-math@1.0.0.0/proofs/lib/nat.bend as N

def dbl0(+z: Nat, +h: {Nat.double(z) == 0n : Nat}) -> {z == 0n : Nat}:
  match z:
    case 0n:
      {==}
    case 1n+p:
      Empty.absurd({1n+p == 0n : Nat}, N.succ_zero(1n+Nat.double(p), h))

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.double
  https://jend.leeeet.dev/definition.txt?path=bend-collections-laws-math@1.0.0.0/proofs/lib/nat.bend&name=succ_zero