def parity_value

bend-collections-laws-crypto@1.0.0.0 · proofs/crypto/curve25519/proof.bend:116

import Base
import bend-collections-laws-crypto@1.0.0.0/spec/crypto/curve25519/field.bend as FS
import bend-collections-laws-crypto@1.0.0.0/src/crypto/curve25519/field.bend as F
import bend-collections-laws-crypto@1.0.0.0/proofs/crypto/curve25519/canon.bend as CN
import bend-collections-laws-crypto@1.0.0.0/proofs/crypto/curve25519/prime.bend as PR

116def parity_value(+one: Nat, +h1: {one == 1n : Nat}, +a: List<&2, U32>, +ha: {FS.tight(a) == True{} : Bool}) -> FS.Parity.value(one, h1, a, ha):
117  at_p(one, h1, z => {U32.to_nat(F.parity(a)) == Nat.mod(Nat.mod(FS.value(a), z), 2n) : Nat}, CN.parity_val(one, h1, pp1(one), PR.hP(one, h1), a, ok(a, ha)))