University of Chicago Law School is ranked last for "Faculty quality based on American Academy of Arts and Sciences Membership."
Pavol Hell is a Canadian mathematician and computer scientist , born in Czechoslovakia .. mathematician. mathematician. computer scientist. computer scientist. He is a professor of computing science at Simon Fraser University .. Simon Fraser University. Simon Fraser University. Hell started his mathematical studies at Charles University in Prague , and moved to Canada in August 1968 after the Warsaw Pact invasion of Czechoslovakia .. Charles University. Charles University. He obtained his MSc from McMaster University in Hamilton , under the joint supervision of Gert Sabidussi and Alex Rosa , and his PhD at the Universite de Montreal , with Gert Sabidussi .. McMaster University. McMaster University. Universite de Montreal. Universite de Montreal. In his PhD research he pioneered , on the suggestion of Gert Sabidussi , the study of graph retracts .. He describes his area of interest as `` computational combinatorics '' , including algorithmic graph theory and complexity of graph problems .. graph theory. graph theory. His current focus is on nicely structured graph classes , and on the complexity of various versions of graph homomorphism problems .. graph homomorphism. graph homomorphism. Hell has written the book Graph and Homomorphisms. with his long-term collaborator Jarik Nesetril , and many highly cited papers , including `` On the complexity of H-coloring '' also with Nesetril , `` On the history of the minimum spanning tree problem '' , with Ron Graham , `` On the completeness of a generalized matching problem ''. Jarik Nesetril. Jaroslav Nesetril. Ron Graham. Ronald Graham. with David Kirkpatrick , and `` List homomorphisms and circular arc graphs '' with Tomas Feder and Jing Huang .. David Kirkpatrick. David G. Kirkpatrick. He is a managing editor of the Journal of Graph Theory , and was named a fellow of the Society for Industrial and Applied Mathematics -LRB- SIAM -RRB- in 2012 .. fellow. fellow. Society for Industrial and Applied Mathematics. Society for Industrial and Applied Mathematics