Iranian Mathematical Society (IMS) Bulletin of the Iranian Mathematical Society 1017-060X Articles in Press 2011 05 26 Complement of Special Chordal Graphs and Vertex Decomposability en Majid Alizadeh Assistant Professor at University of Tehran Afshin Goodarzi MSc Student at University of Tehran 2011 03 08 Cohen-Macaulay sequentially Cohen-Macaulay shellable complex vertex decomposable chordal graph