This article is
dedicated to the memory of my friend and collaborator, Yuri A bramovich.Abstract unavailable at this time...
Mathematics Subject Classification (2000): 46B3, 46B10, 46B42, 46A55.Key words: Cones, bases for cones, quasi-interior points, dentable sets, Schur property.Quaestiones Mathematicae 27(2004), 99-109