proposition: Lemma Str_nth_powers_help_int_pow (n : nat) (c : A) : Str_nth n (powers_help c) = c * a ^ (f n).
proof: Proof. rewrite (Str_nth_powers_help id). unfold id. now rewrite int_pow_nat_pow. Qed.
imports: Coq.setoid_ring.Ring Coq.Arith.Factorial MathClasses.misc.workaround_tactics MathClasses.interfaces.abstract_algebra MathClasses.interfaces.additional_operations MathClasses.interfaces.orders MathClasses.interfaces.naturals MathClasses.interfaces.integers MathClasses.theory.nat_pow MathClasses.theory.int_pow MathClasses.theory.streams