proposition: Lemma itv_minfR s (i : itv_bound nat) : &:s (Interval i -oo) = [::].
proof: Proof. by rewrite /slice /= take0. Qed.
imports: Coq(ssreflect ssrbool ssrfun) mathcomp(ssrnat eqtype seq path interval order) pcm(options prelude ordtype seqext)