报告题目：Some current results on factors of graphs
摘要：A factor of a graph is a spanning subgraph having some given properties.I first present a characterization of 1-tough graphs using factors, and a couple of results on trees related to factors of graphs. Next, I present open problems on factors of graphs and a proof technique on factors of graphs called a beta-method together with some current results which were proved by using this method.
报告人简介：Kano is an emeritus Professor of Ibaraki University. His research interests includes Graph Theory, Discrete Geometry, Visual Cryptography and game, and etc. He is Editor (1985-2000),Managing editor (2000-2007),Editor in Chief（2008- 2014） Consulting editor（2015-）of “Graphs and Combinatorics”. He published more than 100 papers in international journals and 3 books.
Home page : http://gorogoro.cis.ibaraki.ac.jp