law exk
import lawful-bytes@0.1.1.0/proof_fast_append.bend as ProofFastAppendimport Base
1069law exk:
1070 for +ld: U32
1071 for +k: Nat
1072 for +ek: {U32.to_nat((ld .&. 3 : U32)) == k : Nat}
1073 {U32.to_nat(ld) == Nat.add(Nat.mul(Nat.div(U32.to_nat(ld), 4n), 4n), k) : Nat}