LeRoy B. Beasley

Professor of Mathematics




This page contains the following sections:


Research Interests



Recent Publications (Since 2010)

1.       ““Primitivity preservers for matrix pairs” (with Alexander Guterman),  MATRIX METHODS: THEORY, ALGORITHMS AND APPLICATIONS  Dedicated to the Memory of Gene Golub, World Scientific, (2010)  2-19.

2.     “Cycle Extendibility in Graphs and Digraphs”, (with David E. Brown), Linear Algebra Appl., 435(2011) 1513-1519.

3.     “Linear preservers of term ranks of matrices over semirings”, (with Kyung-Tae Kang, Seok-Zun Song), Linear Algebra Appl. 436(2012) 1850-1862.

4.     “Preservers of Term Ranks of Symmetric Matrices”, (with Seok-Zun Song and Kyung-Tae Kang), Linear Algebra Appl., 436(2012) 1727-1738

5.     “A Comparison of Term Ranks of Symmetric Matrices and their Preservers”, (with, Seok-Zun Song and Kyung-Tae Kang),  To appear  in  Linear Algebra and its Applications

6.     “Preservers of sets of undirected graphs”  To appear in Congressus Numerantium

7.     “Preservers of cover numbers and independence numbers of undirected graphs”   Submitted to the Journal of Combinatorial Mathematics and Combinatorial Computing.

8.     “Linear transformations mapping  Mmn to Mpq that preserve term rank”. (with Seok-Zun Song)Submitted to LaMA

9.     “Term rank preservers of matrices over antinegative semirings”, (with Seok-Zun Song) Submitted to LAA via Shader.

10. Preservers of Boolean rank”, (with Seok-Zun Song) (in preparation).

11. Isolation number versus Boolean rank”, Linear Algebra Appl. , 436(2012) 3469-3474.

12. "A note on linear preservers of Boolean ranks", (with Seok-Zun Song) Submitted to the Czechoslovak Journal of Mathematics.



Employer History



Leaves of Absence

September 1987 - June 1988, Sabbatical Leave, Spent in Ireland at Univ. College, Dublin.

September - December 1991, Special Leave.  Invited Participant in the Special Year in Linear Algebra at the Institute for Mathematics and Its Applications, University of Minnesota

September 1994 - June 1995, Sabbatical Leave.  Spent  at St. Cloud State University, Minnesota; University of Regina, Queens University,  (Kingston, Ontario), University of Waterloo, Canada; The Technion  - Israel Institute of Technology, Israel; The Centro de Algebra da Universidade de Lisboa, Portugal; and University College, Dublin, Ireland.

May 2001- June 2002, Sabbatical Leave.  Spent at SungKyunKwan University, Cheju National University and PoHang National University (Korea), University Of Wyoming, University of Regina, Universidad Politechnica de Valencia in Valencia and in Alcoi, Spain, and University College, Dublin, Ireland

May2008-June 2009  Sabbatical Leave.  Spent at USU, Moscow State University (Lomonosov Univ.), and University College, Ireland, Dublin, Ireland.




Consulting Activities

Professional Memberships




Other Interests

Contact Information


LeRoy B. Beasley 1982            LeRoy B. Beasley 2010

Department of Mathematics and Statistics
Utah State University
Logan, UT 84322-3900

Office Phone:(435)-797-3248
Fax: (435)797-1822

E-Mail: lbeasley@math.usu.edu

Last updated: October 26, 2004