Poly.len_le: def of bend-collections-laws-crypto@1.0.0.0
Import: import bend-collections-laws-crypto@1.0.0.0/proofs/crypto/curve25519/poly.bend as Poly
Lines 24-37 of bend-collections-laws-crypto@1.0.0.0/proofs/crypto/curve25519/poly.bend: https://jend.leeeet.dev/read.txt?path=bend-collections-laws-crypto@1.0.0.0/proofs/crypto/curve25519/poly.bend&start_line=24&end_line=37

import Base

def len_le(n: Nat, xs: List<&2, U32>) -> Bool:
  match n:
    case 0n:
      match xs:
        case Nil{}:
          True{}
        case Con{x, xt}:
          False{}
    case 1n+m:
      match xs:
        case Nil{}:
          True{}
        case Con{x, xt}:
          len_le(m, xt)

Uses (4):
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Bool
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=List
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Nat
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=U32