NatOrder.cong_add: def of bend-kit-collections@0.1.4.1
Import: import bend-kit-collections@0.1.4.1/nat_order.bend as NatOrder
Lines 35-39 of bend-kit-collections@0.1.4.1/nat_order.bend: https://jend.leeeet.dev/read.txt?path=bend-kit-collections@0.1.4.1/nat_order.bend&start_line=35&end_line=39

import Base

def cong_add(-a: Nat, -a2: Nat, -b: Nat, -b2: Nat, e1: {a == a2 : Nat}, e2: {b == b2 : Nat})
  -> {Nat.add(a, b) == Nat.add(a2, b2) : Nat}:
  %e1 : {Nat.add(a, b) == Nat.add(_, b2) : Nat}
  %e2 : {Nat.add(a, b) == Nat.add(a, _) : Nat}
  {==}

Uses (2):
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Nat
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Nat.add