def div4

bend-collections-laws-crypto@1.0.0.0 · proofs/crypto/argon2/top.bend:52

import Base
import bend-collections-laws-crypto@1.0.0.0/proofs/lib/lemmas/proofs/nat_algebra.bend as NA

52# sl = q / 4 = X.
53def div4(+x: Nat) -> {Nat.div(Nat.mul(4n, x), 4n) == x : Nat}:
54  %Equal.sym(Nat, Nat.mul(4n, x), Nat.mul(x, 4n), NA.mul_comm(4n, x)) : {Nat.div(_, 4n) == x : Nat}
55  div_exact(x, 4n, {==})