LeRoy B. Beasley
Professor of Mathematics
This page contains the following sections:
- Education
- Research Interests
- Vita
- Recent Publications
- Employment History
- Leaves of Absence
- Consulting Activities
- Professional Memberships
- Other Interests
- Contact Information
Education
- Idaho State Univ. 1960-1964 1964 BS Math/Span.
- Idaho State Univ. 1964-1966 1966 MS Math
- Boise State Univ. 1971-1972 1972 Sec. Teaching Cert.
Research Interests
- Matrix Theory
- Graph theory
- Combinatorics
- Group Theory
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
ACADEMIC EXPERIENCE:
- Special Instructor in Math - Boise State Univ. - 1972-1975
- Math Inst. & Head, Math Dept. - Middleton H. S., Idaho - 1972-1981
- Asst. Prof. - USU - 1981-85
- Assoc. Prof. - USU - 1985-1991
- Visiting Professor - University College, Dublin, IRELAND 1987-1988
- Professor -USU - 1991-present
- Visiting Professor - Technion - Israel Institute of Technology, Haifa, ISRAEL Dec. 1994 & Jan. 1995
- Visiting Professor - Centro de Algebra da Universite de Lisboa, Lisbon, PORTUGAL Feb. - Apr. 1995
- Visiting Professor - University College, Dublin, IRELAND May - Jul. 1995
NONACADEMIC EXPERIENCE:
- U. S. Army - ORSA Officer for 1 year in Vietnam (MACCORDS-RAD/A) - 1971
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,
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
- September 1995-present, for Ken Pedersen, Patent Attorney, Boise, Idaho.
Professional Memberships
- Irish Mathematical Society
- Korean Mathematical Society
- International Linear Algebra Society
- Institute of Combinatorics and its Applications (Fellow)
