Locally Sierpinski quotients

Abstract

Given any non-trivial, connected topological space X, it is possible to de ne an equivalence relation ~ on it such that the topological quotient space X/ ~ is the Sierpinski space. Locally Sierpinski spaces are generalizations of the Sierpinski space and here we address the following question. Does a statement like the one above hold if Sierpinski is replaced by (proper) locally Sierpinski? The answer is no and we will give below a few counterexamples. The situation where a homeomorphism group acts on a topological n-manifold will also be analysed, the conclusion being that the cases n = 1; n > 1 are radically di erent