List.drop_replicate: law of bend-mathlib@0.8.1.0
Import: import bend-mathlib@0.8.1.0/list.bend as List
Lines 1240-1246 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=1240&end_line=1246

import Base

# Dropping m from n copies of x gives n - m copies of x.
law drop_replicate:
  for -A: Data
  for n: Nat
  for m: Nat
  for -x: A
  {List.drop(&2, A, List.replicate(A, n, x), m) == List.replicate(A, Nat.sub(n, m), x) : List<&2, A>}

Uses (5):
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=List
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=List.drop
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=List.replicate
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Nat
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Nat.sub