def iz

bend-collections-laws-math@1.0.0.0 · proofs/math/random/float.bend:333

import Base
import bend-collections-laws-math@1.0.0.0/spec/math/w64.bend as SW
import bend-collections-laws-math@1.0.0.0/src/math/w64.bend as X
import bend-collections-laws-math@1.0.0.0/src/math/u64.bend as WU
import bend-collections-laws-math@1.0.0.0/proofs/math/typed/w64add.bend as WA

333def iz(+m: WU.U64, +vm: Nat, +hv: {SW.value(m) == vm : Nat}) -> {X.is_zero(m) == Nat.is_eq(vm, 0n) : Bool}:
334  Equal.trans(Bool, X.is_zero(m), Nat.is_eq(SW.value(m), 0n), Nat.is_eq(vm, 0n), WA.is_zero_value(m), Equal.cong(Nat, Bool, z => Nat.is_eq(z, 0n), SW.value(m), vm, hv))