MMA2009 P.Code=KaliH ===============------------------------------ First Name =Harijs Last Name =Kalis Title =Profesors Institution =Faculty of physics and mathematics University of Latvia Street Address =Zellu-8 City =Riga State =Latvia Zip Code =LV-1002 Telephone =28660776 FAX =67033701 E-mail =kalis@lanet.lv URL = Title of talk and AMS Subject Classification= ------------------------