Faculty

Dwight Duffus
Goodrich C. White Professor

Office hours
 Monday: 3:00pm  4:00pm
 Wednesday: 1:30pm  3:00pm
 and by appointment
Teaching:
Spring 2015
 MATH 250 (003): Foundations of Mathematics, TuTh 10:00am  11:15am
 MATH 577R (000): Seminar in Combinatorics, M 4:00pm  4:50pm
Research
 Ordered combinatorial and algebraic structures
Recent publications
 Maximal independent sets in the covering graph of the cube, Discrete Applied Mathematics (with P. Frankl and V. Rodl)
 Some quotients of chain products are symmetric chain orders, Electronic Journal of Combinatorics 19(2) (2012) #P46 (with J. McKibbenSanders and K. Thayer)
 Maximal independent sets in bipartite graphs obtained from Boolean lattices, European Journal of Combinatorics 32 (2011) 1  9 (with P. Frankl and V. Rodl)
 Introductory life sciences mathematics and quantitative neuroscience courses, CBE  Life Sciences Education 9 (2010) 370  377 (with Andrei Olifer)
 On the size of maximal chains and the number of pairwise disjoint maximal antichains, Discrete Mathematics 310 (2010) 2883  2889 (with Bill Sands)
 Retracts of posets: the chaingap property and the selection property are independent, Algebra Universalis, (Oct 2008) (with C. Laflamme and M. Pouzet)
 Antichains in the homomorphism order of graphs, Comment. Math. Univ. Carolin. 48 (2007) 571  583 (with P.L. Erdos, J. Nesetril, and L. Soukup)
 Chromatic numbers and homomorphisms of large girth hypergraphs, Topics in Discrete Mathematics, Algorithms and Combinatorics 26 (2006) 455471 (with V. Rodl, B. Sands, and N. Sauer)
 Splitting numbers of grids, Electronic Journal of Combinatorics 12 (2005) R17: 31 pp. (with B. Sands)
 Chromatic numbers and graph products, Discrete Mathematics 300 (2005) 9199 (with N. Sauer)
 Distributive lattices with the splitting property, Algebra Universalis 49 (2003) 1333 (with B. Sands)
 Some progress on the AharoniKorman conjecture, Discrete Mathematics 250 (2002) 7991 (with T. Goddard)
 Minimumsized fibres in distributive lattices, J Austral Math Soc 70 (2001) 337350 (with B. Sands)
 An ordered set of size aleph 1 with monochromatic maximal chains, Order 17 (2000) 227238 (with T. Goddard)
Education
 Ph.D. (1978) University of Calgary
 M.Sc. (1976) University of Calgary
 B.A.(Hon.) (1974) University of Regina
Activities
 Editor: ORDER
 Referee: Discrete Mathematics, SIAM Journal of Discrete Mathematics, ORDER
 Member: SIAM [DMAG], AMS, MAA
