law length_nil_sym

bend-mathlib@0.8.1.0 · list.bend:2438

import Base

2438# The empty list has length zero, reversed to rewrite toward the simple side.
2439law length_nil_sym:
2440  for -a: Quant
2441  for -A: Kind(a)
2442  {0n == List.length(a, A, Nil{}) : Nat}