List.drop_zero_sym: law of bend-mathlib@0.8.1.0
Import: import bend-mathlib@0.8.1.0/list.bend as List
Lines 2284-2289 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=2284&end_line=2289

import Base

# Dropping zero elements gives the list back, reversed to rewrite toward the simple side.
law drop_zero_sym:
  for -a: Quant
  for -A: Kind(a)
  for xs: List<a, A>
  {xs == List.drop(a, A, xs, 0n) : List<a, A>}

Uses (4):
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Equal.sym
  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=bend-mathlib@0.8.1.0/list.bend&name=drop_zero