For the set C(X) of real-valued continuous functions on a Tychonoff space X,
the compact-open topology on C(X) is a "set-open topology". This paper studies
the separation and countability properties of the space C(X) having the
topology given by the join of the compact-open topology and an "open-set
topology" called the open-point topology, that was introduced in [6].Comment: Some corrections are mad