fact: Record nneg_finfun := mkNNFinfun { nneg_ff :> {ffun T -> R} ; _ : [forall a, (0 <= nneg_ff a)%mcR] }.
imports: mathcomp(all_ssreflect) mathcomp(all_algebra vector reals normedtype) mathcomp(mathcomp_extra boolp) mathcomp(Rstruct) ssrR realType_ext Reals Lra mathcomp(lra)