%0 Journal Article
%A W. Ruppert
%T In a left-topological semigroup with dense center the closure of any left ideal is an ideal.
%J Semigroup forum
%D 1987
%P 247-248
%V 36
%I mathdoc
%U http://geodesic.mathdoc.fr/item/SF_1987__36_134899/
%F SF_1987__36_134899