def add_zero
import bendtorch-core@0.1.0.0/src/autograd/tensor_chain_PROOF.bend as TensorChainPROOFimport Base
476def add_zero(+number: Nat) -> {number == Nat.add(number, 0n) : Nat}:
477 match number:
478 case 0n:
479 {==}
480 case 1n+rest:
481 Equal.cong(Nat, Nat, value => 1n+value, rest, Nat.add(rest, 0n), add_zero(rest))