%0 Journal Article %A H. Komiya %T Convexity on a topological space %J Fundamenta Mathematicae %D 1981 %P 107-113 %V 111 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/fm-111-2-107-113/ %R 10.4064/fm-111-2-107-113 %G en %F 10_4064_fm_111_2_107_113