grp_pow_neg_inv' {G: Group} (n: Int) (g : G) : grp_pow (- g) n = - grp_pow g n. Proof. lhs_V nrapply grp_pow_neg. apply grp_pow_neg_inv. Defined.
Require Import Basics Types HProp HFiber HSet. Require Import Homotopy.IdentitySystems. Require Import (notations) Classes.interfaces.canonical_names. Require Import Pointed.Core. Require Import WildCat. Require Import Spaces.Nat.Core Spaces.Int. Require Import Truncations.Core.