PROOF.AP.app_cong_l: def of bend-osdev-array@0.1.0.1
Import: import bend-osdev-array@0.1.0.1/PROOF.bend as PROOF
Lines 998-1000 of bend-osdev-array@0.1.0.1/PROOF.bend: https://jend.leeeet.dev/read.txt?path=bend-osdev-array@0.1.0.1/PROOF.bend&start_line=998&end_line=1000

import Base

def AP.app_cong_l(-T: Data, -x: List<&2, T>, -y: List<&2, T>, -ys: List<&2, T>, e: {x == y : List<&2, T>}) -> {List.append(&2, T, x, ys) == List.append(&2, T, y, ys) : List<&2, T>}:
  %e : {List.append(&2, T, x, ys) == List.append(&2, T, _, ys) : List<&2, T>}
  {==}

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