def double_pow
bend-collections-laws-math@1.0.0.0 · proofs/lib/u32.bend:28
import bend-collections-laws-math@1.0.0.0/proofs/lib/u32.bend as U32
import Base
import bend-collections-laws-math@1.0.0.0/proofs/lib/nat.bend as N
import bend-collections-laws-math@1.0.0.0/proofs/lib/lemmas/proofs/nat_algebra.bend as NA
28def double_pow(+x: Nat) -> {Nat.double(x) == Nat.add(x, Nat.add(x, 0n)) : Nat}:
29 %Equal.sym(Nat, Nat.add(x, 0n), x, N.add_zero(x)) : {Nat.double(x) == Nat.add(x, _) : Nat}
30 NA.double_self(x)