law drop_zero_sym

bend-mathlib@0.8.1.0 · list.bend:2284

import Base

2284# Dropping zero elements gives the list back, reversed to rewrite toward the simple side.
2285law drop_zero_sym:
2286  for -a: Quant
2287  for -A: Kind(a)
2288  for xs: List<a, A>
2289  {xs == List.drop(a, A, xs, 0n) : List<a, A>}