law double_div_two_add_mod_two_sym

bend-mathlib@0.8.1.0 · nat.bend:4837

import Base

4837# Twice the half plus the parity is the number: double (n / 2) + n % 2 = n, reversed to rewrite toward the simple side.
4838law double_div_two_add_mod_two_sym:
4839  for n: Nat
4840  {n == Nat.add(Nat.double(Nat.div(n, 2n)), Nat.mod(n, 2n)) : Nat}