def dval
import bend-collections-laws-crypto@1.0.0.0/proofs/crypto/ed25519/pcodec.bend as Pcodecimport Base
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/src/crypto/ed25519/point.bend as PT
109def dval(+xs: List<&2, U32>) -> List<&2, U32>:
110 F.mul(F.neg(PT.lit(xs, PT.c121665())), F.inv(PT.lit(xs, PT.c121666())))