Bitcount.ones_zero: def of bend-collections-laws-math@1.0.0.0
Import: import bend-collections-laws-math@1.0.0.0/proofs/math/number/bitcount.bend as Bitcount
Lines 22-27 of bend-collections-laws-math@1.0.0.0/proofs/math/number/bitcount.bend: https://jend.leeeet.dev/read.txt?path=bend-collections-laws-math@1.0.0.0/proofs/math/number/bitcount.bend&start_line=22&end_line=27

import Base
import bend-collections-laws-math@1.0.0.0/spec/math/number.bend as SN

def ones_zero(+k: Nat) -> {SN.ones(k, 0n) == 0n : Nat}:
  match k:
    case 0n:
      {==}
    case 1n+ +p:
      ones_zero(p)

Uses (2):
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Nat
  https://jend.leeeet.dev/definition.txt?path=bend-collections-laws-math@1.0.0.0/spec/math/number.bend&name=ones