Date: Tue, 08 Aug 2000 00:41:10 +0200 From: Philippe Elbaz-Vincent Subject: [TopList] incidence numbers I am looking for references on the following topics: Let X be a regular finite CW-complex, and G a group acting on it. We suppose that the action of G is cellular and that we get a well defined CW-complex X/G (a priori not regular). I moreover suppose that both X, G and the action are effective (meaning that we can implement it on a computer). In particular we know how to compute (effectively) the stabilizer group of a cell. Do you know some references on the (effective) computation of the incidence numbers of X/G ? Hoping that the Topology list could help on this matter. Thanking you in advance. Best regards,Ph. Elbaz-Vincent. NB: don't hesitate to ask me more details, if my question is not well posed enough. -- Laboratoire Geometrie-Topologie, Algebre, UMR CNRS 5030 http://www.math.univ-montp2.fr/GTA/