Cartesian closed topological hulls

ABsTRAcr. It is shown in this paper that if a concrete category 9 admits embedding as a full finitely productive subcategory of a cartesian closed topological (CCT) category, then W admits such embedding into a smallest CCT category, its CCT hull. This hull is characterized internally by means of density properties and externally by means of a universal property. The problem is posed of whether every topological category has a CCT hull.