fact: Definition normal f:= [/\ forall x, T3nf x -> T3nf (f x), (forall x y, T3nf x -> T3nf y -> x < y -> f x < f y)& (forall x, T3nf x -> T3limit x -> sup_of f x (f x)) ].
imports: HB(structures) mathcomp(ssreflect ssrfun ssrbool eqtype ssrnat) mathcomp(fintype bigop)