proposition: Lemma dnn_Str_nth_nonneg `(dnn : DecreasingNonNegative s) n : 0 ≤ Str_nth n s.
proof: Proof. destruct n; apply (dnn_hd_nonneg _). 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