Weizhen (Diana) Gu Professor of Mathematics Office: Math/CS 567 Phone: 512-245-9017 Fax: 512-245-3425 Email: wg04@txstate.edu Home Page

Research Interests: Graph theory.

Dr. Gu received her Ph.D. from Louisiana State University in 1990. Her research interests includes: Graph theory, network designs, facility location on networks, and some distance problems. Resently, she has been working on permutation graphs, domination in graphs, and eccentric digraphs.

Selected Publications

• Gu, Weizhen; Jia, Xingde; Wu, Haidong; Chords in graphs. Australas. J. Combin. 32 (2005), 117--124.
• Gu, Weizhen; On central appendage number of a uniform central graph. Proceedings of the Thirty-third Southeastern International Conference on Combinatorics, Graph Theory and Computing (Boca Raton, FL, 2002). Congr. Numer. 159 (2002), 69--75.
• Chartrand, Gary; Gu, Weizhen; Schultz, Michelle; Winters, Steven J.; Eccentric graphs. Networks 34 (1999), no. 2, 115--121.
• On Diameter of Permutation Graphs, Networks, 33(1999), 161--166.
• On Eccentric Graphs, Congressus Numerantium, 140(1999), 199--207.
• Gu, Weizhen; On upper bound of diameters of permutation graphs. Proceedings of the Twenty-seventh Southeastern International Conference on Combinatorics, Graph Theory and Computing (Baton Rouge, LA, 1996). Congr. Numer. 121 (1996), 223--230.
• Representation of Plurality Preference Digraphs Realized by Trees, I: Necessary and Sufficient Conditions, (with K. B. Reid), Discrete Math., 147(1995), 185--196.
• On Realizations of Digraphs by Preferences Based on Distances in Graphs, (with K. B. Reid and W. Schnyder), J. Graph Theory, 19(1995), 367--373.
• Minimal Embedding of Two Graphs as Center and Periphery, J. Graphs and Combinatorics, 9(1993), 315--323.
• Representation of Plurality Preference Digraphs Realized by Trees, II: On Realization Numbers, (with K. B. Reid),  Discrete Math., 101(1992), 231--249.
• Exact Order of Subsets of Asymptotic Bases, (with S. Chen), J. of Number Theory 41(1992), 15--21.
• Peripheral and Eccentric Vertices in Graphs,(with K.B.Reid), J. Graphs and Combinatorics 8(1992), 361--375.
• Peripheral and Eccentric Vertices in Products of Graphs, (with K.B.Reid), Congressus Numerantium} 79(1990), 79--88.
• Finding Centers of Certain Tree-like Networks, (with K.B.Reid), Congressus Numerantium} 67(1988), 265--278.