proposition: Lemma dnn_hd_nonneg `(dnn : DecreasingNonNegative s) : 0 ≤ hd s.
proof: Proof. destruct dnn. now transitivity (hd (tl s)). 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