Volume 192, Issue 3

This issue is a translation of Zapiski Nauchnykh Seminarov Sankt-Peterburgskogo Otdeleniya Matematicheskogo Instituta im. V. A. Steklova Rossiiskoi Akademii Nauk (Notes of Scientific Seminars of the St. Petersburg Department of the Steklov Mathematical Institute, Russian Academy of Sciences), Vol. 402, 2012. This issue is entitled Combinatorics and Graph Theory, Part IV, and was edited by Yu. V. Matiyasevich and J. Karhumäki.