proposition: Lemma leR1exp2 s : 1 <= exp2R s.
proof: Proof. by apply/(@intR_leP R 1); rewrite lez_nat expn_gt0. Qed.
imports: mathcomp(ssreflect ssrfun ssrbool eqtype ssrnat seq choice) mathcomp(fintype tuple path fingraph bigop order ssralg) mathcomp(ssrnum ssrint div intdiv) fourcolor(hypermap geometry coloring grid matte) fourcolor(real realplane) Coq(Setoid Morphisms) fourcolor(realsyntax realprop)