Department of Algebra and Number Theory, Mathematics Institute, Faculty of Science, Eötvös Loránd University, Pázmány Péter sétány 1/C, Budapest, 1117, Hungary
Horváth Péter
Department of Algebra and Number Theory, Mathematics Institute, Faculty of Science, Eötvös Loránd University, Pázmány Péter sétány 1/C, Budapest, 1117, Hungary