def sub_nat

bend-collections-laws-crypto@1.0.0.0 · proofs/lib/u32.bend:100

import Base
import bend-collections-laws-crypto@1.0.0.0/proofs/lib/lemmas/proofs/subtraction_bounds.bend as SB

100def sub_nat(+a: U32, +b: U32, +e: {Nat.is_le(U32.to_nat(b), U32.to_nat(a)) == True{} : Bool}) -> {U32.to_nat(U32.sub(a, b)) == Nat.sub(U32.to_nat(a), U32.to_nat(b)) : Nat}:
101  SB.u32_exact(a, b, e)