fact: Variables (T1 T2 : pointedType) (C1 : set (set T1)) (C2 : set (set T2)).
imports: mathcomp(all_ssreflect all_algebra finmap) mathcomp(mathcomp_extra boolp classical_sets functions) mathcomp(cardinality fsbigop ) reals ereal signed topology normedtype sequences esum numfun HB(structures)