law double_le_double
import bend-mathlib@0.8.1.0/nat.bend as Natimport Base
3620# Doubling preserves the order: a <= b implies double a <= double b.
3621law double_le_double:
3622 for a: Nat
3623 for b: Nat
3624 for h: le(a, b)
3625 le(Nat.double(a), Nat.double(b))