def is_odd

import bend-collections-laws-crypto@1.0.0.0/src/crypto/secp256k1/schnorr.bend as Schnorr

import Base
import bend-collections-laws-crypto@1.0.0.0/src/crypto/secp256k1/field.bend as F

43def is_odd(+y: List<&2, Nat>) -> Nat:
44  F.parity(y)

Uses (3)