fact: Definition NngNum (R : numDomainType) (x : R) (x_ge0 : 0 <= x) : {nonneg R} := (@Signed.mk _ _ 0 ?=0 >=0 x x_ge0).
imports: HB(structures) Coq(ssreflect ssrfun ssrbool) mathcomp(ssrnat eqtype choice order ssralg ssrnum ssrint) mathcomp(mathcomp_extra)