def drop_eq

bend-collections-laws-crypto@1.0.0.0 · proofs/crypto/ed25519/bytes.bend:36

import Base
import bend-collections-laws-crypto@1.0.0.0/spec/crypto/ed25519.bend as SE
import bend-collections-laws-crypto@1.0.0.0/src/crypto/curve25519/field.bend as F

36def drop_eq(+n: Nat, +xs: List<&2, U32>) -> {F.drop(n, xs) == SE.rest(n, xs) : List<&2, U32>}:
37  match n:
38    case 0n:
39      {==}
40    case 1n+ +m:
41      match xs:
42        case Nil{}:
43          {==}
44        case Con{+x, +xt}:
45          drop_eq(m, xt)