Dr. Roger Yu
Position: Full Professor
Affiliation: Shandong Uni (China)
LinksHomepage URL: faculty.tru.ca/yu/
InterestsReading; badminton; down-hill skiing; hunting
Research InterestsGraph Theory, Discrete Optimization and Mathematical Modeling
EducationPhD, 1991, Major: Discrete Math, Simon Fraser University, Canada
MSc, 1985, Major: Operations Research, Shandong University, China
PublicationsSelected Publications (2010-2016)
Due to space limitation (only 4000 characters allowed). A list of selected recent publications is given below. For the complete list from 2004 to present, please go to link
 M. Kano, H. Lu and Q. L. Yu, Component factors with large components in graphs, Applied Math. Letters, 23 (2010) 385-389.
 T. Wang and Q. L. Yu, A conjecture on k-factor-critical and 3-dominating-critical graphs, Science in China, Series A, Vol. 53, No. 5, (2010), 1385-1391.
 Z. Wu, X. Yang and Q. L. Yu, Note on graph minors and strong products, Applied Math Letters, 23 (2010) 1178-1182.
 Y. H. Ma and Q. L. Yu, On existence of [a, b factors avoiding given subgraphs, Ars Combin., 96 (2010), 361-373.
 H. Lu, Y. Wu, Q. L. Yu and Y. Lin, On superconnectivity of (4,g cages with even girth, Networks, 56 (2010), no. 2, 143???148.
 H. Lu and Q. L. Yu, Constructive proof of deficiency theorem of (g, f factors, Sci. China Math., 53 (2010), no. 6, 1657???1662.
 M. Kano, Y. J. Wu and Q. L. Yu, Star-uniform graphs, Graphs and Combin., 26 (2010), no. 3, 383???394.
 H. Lu, Y. Wu, Q. L. Yu and Y. Lin, New improvements on connectivity of cages, Acta Math. Sinica, Vol. 27, No. 6 (2011), 1163-1172.
 H. Lu and Q. L. Yu, The general fractional f-factor numbers of graphs, Applied Math. Letters, 24 (2011) 519-523.
 H. Lu, Q. L. Yu and C. Q. Zhang, Vertex-coloring 2-edge-weighting of graphs, Euro. J Combin., 32 (2011) 21-27.
 B. Bai, H. Lu and Q. Yu, Generalization of matching extensions in graphs (III), Applied Discrete Math., 159 (2011), 727-732.
 Z. Wu, X. Yang and Q. L. Yu, On the strong product of an m-factor-critical and an n-factor-critical graphs, Inter J Computer Math., 88 (2011), no. 13, 2685-2696.
 B. Bai, X. Huan and Q. L. Yu, On the extendability of Cayley graphs on dicyclic group, Utilitas Math., 85 (2011), 201???211.
 Z. F. Wu, G. Z. Liu and Q. Yu, Toughness of graphs and [a, b factor with prescribed properties, Sci. China Math. 54 (2011), no. 7, 1491???1498.
 Y. J. Wu and Q. Yu, A Characterization of graphs with ?? = ??, Bulletin of the Malaysian Math. Sci. Society, Vol. 35, No. 3 (2012), 803-806.
 Z. Wu, X. Yang and Q. L. Yu, Factor-criticality of Cartesian products, Graphs and Combin., Vol. 28, No. 5 (2012), 723-736.
 Y. Duan, H. Lu and Q. L. Yu, L-factors and adjacent vertex-distinguishing edge-weighting, East Asia J Applied Math., Vol. 2, No. 2 (2012), 83-93.
 H. Lu, Y. Wu, Y. Lin, Q. L. Yu, C. Balbuena, X. Marcote, On superconnectivity of (4,g cages: the case of odd g, Graphs and Combin., 29 (2013), no. 1, 105???119.
 Y. Zhang, Q. L. Yu and G. Liu, Edge disjoint Hamilton cycles in intersection graphs of bases of matroids, Utilitas Math., 90 (2013), 327-334.
 H. Lu, G. L. Wang and Q. L. Yu, On the existence of general factors in regular graphs, SIAM J. Discrete Math. Vol. 27, No. 4 (2013), 1862???1869.
 T. Wang, Z. Wu and Q. L. Yu, 2-tough graphs and f-factors with given properties, Utilitas Math., 90 (2013), 219-237.
 Y. H. Duan, T. Wang, B. G. Xu and Q. L. Yu, On some properties of cages, Ars Combin., 108 (2013) 201-208.
 Y. Zan, J. Wu, P. Li and Q. L. Yu, SICR rumor spreading model in complex networks: considering the self-resistance of networks for rumors, Physica A, 405 (2014) 159-170.
 Y. J. Wu and Q. L. Yu, Uniformly weighted star-factors of graphs, Ars Combinatorica, 113 (2014) 391-404.
 M. D. Plummer, T. Wang and Q. L. Yu, Matching extension and cyclic connectivity, Graphs and Combin., Vol. 30, No. 4 (2014) 1003-1011.
 Y. H. Duan and Q. L. Yu, Double-twist wheel is Tutte-polynomial unique, Acta Math. Scientia, Series A, (accepted).
 H. Lu and Q. Yu, Generalization of matching extensions in graphs (IV): Closure, Graphs and Combin. (accepted).
Employment HistoryFull Professor, Thompson Rivers University, Canada, 2001-present;
Associate Professor, Thompson Rivers University, Canada, 1999-2001;
Adjunct Professor, Simon Fraser University, Canada, 1991-2006;
Senior Research Fellow, Center for Combinatorics, Nankai University, China, 2003-2009;
Adjunct Professor, Shandong University, China, 2009-2017.
Adjunct Professor, University of Newcastle, Australia, 2009-2013;
Assistant Professor, Thompson Rivers University (formerly UCC), Canada, 1991-1999;
Instructor, Simon Fraser University, Canada, 1991;
Assistant Professor, Shandong University, China, 1985-1986.
Courses TaughtIn Winter/2016:
Math-1240 (Calculus II)