fact: Definition lt_creal (x y : creal) : Prop := exists eps, (0 < eps) && (x (cauchymod x eps) + eps * 3%:R <= y (cauchymod y eps)).
imports: mathcomp.ssreflect.ssreflect mathcomp(ssrfun ssrbool eqtype ssrnat seq choice fintype) mathcomp(bigop order ssralg ssrnum ssrint rat poly polydiv polyorder) mathcomp(perm matrix mxpoly polyXY binomial bigenough)