def f_neg
import bend-collections-laws-crypto@1.0.0.0/proofs/crypto/secp256k1/fprot.bend as Fprotimport Base
import bend-collections-laws-crypto@1.0.0.0/src/crypto/secp256k1/field.bend as F
113def f_neg(a: List<&2, Nat>) -> {F.neg(a) == F.neg_u(a) : List<&2, Nat>}:
114 {==}