David Gregory Professor Emeritus
Email:   gregoryd{at}mast{dot}queensu{dot}ca Tel:   613-533-2401
Research:  Graph theory,   Combinatorial matrix theory
Publications:  Recent and Selected,  All in Print
Ph.D. Students

Links:  Astronomy,   MathSciNet,   Library,   ArXiv,   Combinatorica,   IMAGE,   QSpace,
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GC,   ELA,   Weekly Events  

Notes:  
Hall conditions for edge-weighted bipartite graphs [pdf] ,   QSpace  

Queen's - R.M.C. Discrete Mathematics Seminar  
A matchings dual for graphs (8 May 2011) [pdf]  
Expressing graphs in terms of complete bipartite graphs (Nov. 1 and 22, 2011) [pdf] Revised Dec. 2011

Memorial Pages:   Norman J. Pullman (1931-99),     Dom de Caen (1956-2002)