law drop_succ

bend-mathlib@0.8.1.0 · list.bend:2114

import Base

2114# Dropping n + 1 elements of a cons drops its head and n from its tail.
2115law drop_succ:
2116  for -a: Quant
2117  for -A: Kind(a)
2118  for -x: A
2119  for -xs: List<a, A>
2120  for -n: Nat
2121  {List.drop(a, A, x <> xs, 1n+n) == List.drop(a, A, xs, n) : List<a, A>}