TAILIEUCHUNG - Báo cáo hóa học: "THE ANOSOV THEOREM FOR INFRANILMANIFOLDS WITH AN ODD-ORDER ABELIAN HOLONOMY GROUP"

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: THE ANOSOV THEOREM FOR INFRANILMANIFOLDS WITH AN ODD-ORDER ABELIAN HOLONOMY GROUP | THE ANOSOV THEOREM FOR INFRANILMANIFOLDS WITH AN ODD-ORDER ABELIAN HOLONOMY GROUP K. DEKIMPE B. DE ROCK AND H. POUSEELE Received 9 September 2004 Revised 18 February 2005 Accepted 21 July 2005 We prove that N f I L f I for any continuous map f of a given infranilmanifold with Abelian holonomy group of odd order. This theorem is the analogue of a theorem of Anosov for continuous maps on nilmanifolds. We will also show that although their fundamental groups are solvable the infranilmanifolds we consider are in general not solvmanifolds and hence they cannot be treated using the techniques developed for solvmanifolds. Copyright 2006 K. Dekimpe et al. This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use distribution and reproduction in any medium provided the original work is properly cited. 1. Introduction Let M be a smooth closed manifold and let f M M be a continuous self-map of M. In fixed point theory two numbers are associated with f to provide information on its fixed points the Lefschetz number L f and the Nielsen number N f . Inspired by the fact that N f gives more information than L f but unfortunately N f is not readily computable from its definition while L f is much easier to calculate in literature a considerable amount of work has been done on investigating the relation between both numbers. In 1 Anosov proved that N f L f for all continuous maps f M M if M is a nilmanifold but he also observed that there exists a continuous map f K K of the Klein bottle K such that N f I L f I. There are two possible ways of trying to generalize this theorem of Anosov. Firstly one can search classes of maps for which the relation holds for a specific type of manifold. For instance Kwasik and Lee proved in 10 that the Anosov theorem holds for homotopic periodic maps of infranilmanifolds and in 14 Malfait did the same for virtually unipotent maps of infranilmanifolds. Secondly one can look for classes of

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