PROOF.un.double_cong: def of bend-osdev-u32@0.1.0.0
Import: import bend-osdev-u32@0.1.0.0/PROOF.bend as PROOF
Lines 58-60 of bend-osdev-u32@0.1.0.0/PROOF.bend: https://jend.leeeet.dev/read.txt?path=bend-osdev-u32@0.1.0.0/PROOF.bend&start_line=58&end_line=60

import Base

def un.double_cong(-a: Nat, -b: Nat, e: {a == b : Nat}) -> {Nat.double(a) == Nat.double(b) : Nat}:
  %e : {Nat.double(a) == Nat.double(_) : 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.double