Iranian Mathematical Society (IMS) Bulletin of the Iranian Mathematical Society 1017-060X 37 No. 3 2011 10 15 A characterization of shellable and sequentially Cohen-Macaulay1 9 en S. Moradi Amirkabir University of Technology D. Kiani Amirkabir University of Technology 2009 08 25 Edge ideals shellable complex sequentially Cohen-Macaulay ring