List.mem_append_right: law of bend-mathlib@0.8.1.0
Import: import bend-mathlib@0.8.1.0/list.bend as List
Lines 800-806 of bend-mathlib@0.8.1.0/list.bend: https://jend.leeeet.dev/read.txt?path=bend-mathlib@0.8.1.0/list.bend&start_line=800&end_line=806

import Base

# A member of ys is a member of xs ++ ys (Nat lists).
law mem_append_right:
  for xs: List<&2, Nat>
  for ys: List<&2, Nat>
  for x: Nat
  for h: mem(~Nat, ~Nat.is_eq, x, ys)
  mem(~Nat, ~Nat.is_eq, x, List.append(&2, Nat, xs, ys))

Uses (6):
  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
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Nat
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Nat.is_eq
  https://jend.leeeet.dev/definition.txt?path=bend-mathlib@0.8.1.0/list.bend&name=internal_mem_append_right
  https://jend.leeeet.dev/definition.txt?path=bend-mathlib@0.8.1.0/list.bend&name=mem