Leslie Hogben

Dio Lewis Holl Chair in Applied Mathematics 
Professor of Mathematics
488 Carver Hall
Department of Mathematics
Associate Dean for Graduate Studies and Faculty Development
237 Catt Hall
College of Liberal Arts and Sciences
Iowa State University
Ames, IA 50011
ISU email (hogben at iastate dot edu)
is for ISU business only
If you are not at ISU,
please use hogben at aimath dot org


Associate Director for Diversity
American Institute of Mathematics
hogben at aimath dot org


Linear Algebra, Graph Theory, and Applications American Institute of Mathematics
Institute for Mathematics and its Applications (IMA)
Banff International Research Station (BIRS)
American Mathematical Society (AMS)
Association for Women in Mathematics (AWM)  


Handbook of Linear Algebra

  • Leslie Hogben, Iowa State University, Editor
  • Richard Brualdi, University of Wisconsin (Madison), Associate Editor
  • G. W. Stewart, University of Maryland, Associate Editor

Second Edition

CRC Press, (c) 2014.

  • Leslie Hogben, Iowa State University, Editor
  • Richard Brualdi, University of Wisconsin (Madison), Associate Editor
  • Anne Greenbaum, University of Washington, Associate Editor
  • Roy Mathias, University of Birmingham (England), Associate Editor
CRC Press, (c) 2007.

Recognized as an OUTSTANDING ACADEMIC TITLE by Choice magazine.

Recent Trends in Combinatorics (IMA Volume in Mathematics and its Applications)
  • Andrew Beveridge, Macalester College
  • Jerrold R. Griggs, University of South Carolina
  • Leslie Hogben, Iowa State University
  • Gregg Musiker, University of Minnesota
  • Prasad Tetali, Georgia Institute of Technology
Springer, (c) 2016.

50 Years of Combinatorics, Graph Theory, and Computing

  • Fan Chung, University of California San Diego
  • Ronald L. Graham, University of California San Diego
  • Frederick Hoffman, Florida Atlantic University
  • Leslie Hogben, Iowa State University and the American Institute of Mathematics
  • Ronald Mullin, University of Waterloo and Florida Atlantic University
  • Douglas West, University of Illinois at Urbana, Champaign
To be be published by CRC Press

Postdocs and Graduate Students

Information about the ISU math & applied math PhD and MS programs
Information about the ISU math & applied math postbaccaluareate certificate program
Information about the ISU Masters of School Mathematics (MSM) for teachers
ISU postdoc positions are advertised on MathJobs (2020 position will be announced in September)

Postdoctoral Associates
Dr. Jesse Geneson                   2018-           
Dr. Michael Young                 2010-2014    Assoc. Prof., Iowa State
Dr. Minerva Catral                  2009-2010    Assoc. Prof., Xavier University
Dr. Jason Grout                       2007-2009    Bloomberg (Jupyter Lab)

Ph. D.

Esther Conrad                        current                                                                                 (joint with Kristin Rozier)
Michael Ross                         current
Carolyn Reinhart                   current
Beth Bjorkman                      current
Joshua Carlson                      2019   Postdoc, Williams College
Derek Young                        2019   Postdoc, Mt. Holyoke College
Michael Dairyko                   2018  Data Scientist, Milwaukee Brewers   On exponential domination of graphs   (joint with Michael Young)
Chassidy Bozeman               2018  Asst Prof., Mt. Holyoke College Connections to zero forcing: tree covers and power domination See also
Xavier Martinez-Rivera        2017  Postdoc, U Victoria Principal rank characteristic sequences      
Jephian Chin-Hung Lin        2017  Asst. Prof., National Sun Yat-Sen U (Taiwan)  Variants of zero forcing and their applications to the minimum rank problem
                                                        (joint with Steve Butler)  
Kevin Palmowski                 2015  Data Scientist, SRC  A fractional approach to minimum rank and zero forcing
Nicole Kingsley                    2015  Vis. Lect., Rochester Institute of Technology  Skew propagation time
Brian Lois                             2015  Data Scientist, AT&T  Correctness results for on-line robust principal components analysis   (joint with Namrata Vaswani)
Nathan Warnberg                 2014   Asst. Prof., U Wisconsin-LaCrosse  Positive semidefinite propagation time
Craig Erickson                      2014  Vis. Lect., Hamline U Sign patterns that require eventual exponential nonnegativity
Steven Osborne                    2013   Workiva Cospectral bipartite graphs for the normalized Laplacian  (joint with Steve Butler)
Geoff Tims                           2013   Nationwide Insurance    Haemers' minimum rank (thesis)    Sage program    Output for additional graphs
Travis Peters                         2012   Vis. Asst. Prof., St. Benedict's/St. John's    Positive semidefinite maximum nullity and zero forcing number
Darren Row                          2011  Asst. Prof., St Mary's University MN      Zero forcing number: results for computation and comparison with other graph parameters
Olga (Pryporova) Kurth       2009   was post-doc at U Connecticut   Types of convergence of matrices
Rana Mikkelson                   2008   was US government    Minimum rank of graphs that allow loops
Amy (Wangsness) Wehe     2005   Professor, Fitchburg State University    The matrix completion problem regarding various classes of P_0,1- matrices  

M. S.
Michael Ross                            2018 (PhD student ISU)
AnnaVictoria Ellsworth            2015 Data Analyst, Connance
Xavier Martinez-Rivera            2014 (completed PhD at ISU)
Nicole Kingsley                       2014 (completed PhD at ISU)
Arianne Ross                            2011 was at Coastal Carolina University
Laura (DeLoss) Hogrefe          2009  John Deere Financial
Olga Ruff                                 2007 was in PhD program in Germany
Sandra Nordstrom                    2002
Daniel Carberry                       1995
Rachel Lamp                           1990  Northern Iowa Community College
Joyati (Chakraborty) Debnath 1985  (ISU PhD) Winona State University

M. S. M.
Elizabeth Todd           2018   (joint with E. Stines)
Adam Retzlaff            2017 
   (joint with E. Stines)
Daniel Sarasio Meyer 2008
Joyce Eveland            2006   (joint with Heather Thompson)
Jennifer Parker           2006

Becky Atherton         2005
Lesley Lamphier        2004
Michelle Funcke        2002

Education and Outreach

I taught for more than 40 years at ISU but am no longer teaching.  Improving mentoring of graduate students, postdoctoreal researchers, and junior faculty is a continuing interest.

Early Career materials

Joining a mathematical research community (with Chris Stevens, AMS Notices August 2019)

3rd Undergraduate Mathematics Courses Forum, Chengdu, China, November 2-4, 2007

Dean Schmittmann presents the award
ISU Mathematics Department wins
2015 American Mathematical Society Award for an Exemplary Program or Achievement in a Mathematics Department


AMS Notices article

Dean Schmittmann presents the award in photo at left

BIRS Focused Research Group 2016 The Inverse Eigenvalue Problem of a Graph

Fall 2014 at Institute for Mathematics and its Applications (IMA)
ISU students and Faculty at IMA
ISU students and faculty at Probabilistic & Extremal Combinatorics Workshop outside Lind Hall (above) and
all participants in Geometric and Enumerative Combinatorics Workshop in Keller Hall (below)

The ISU Faculty Senate unanimously approved the following resolution on November 8, 2016:
That the Faculty of the Iowa State University Senate stand united for the ideals of diversity and inclusion at our university. We welcome all students to learn to the best of their abilities on our campus in an environment free from racism, sexism, bigotry, harassment, and oppression. We uphold these ideals ourselves, and strongly encourage our colleagues across the university both to uphold these ideals, and to teach them when appropriate to our students as a way to move human society forward.
Other Utility links
Iowa State University seen flying from MSP to DSM 4/7/18. Carver Hall (home of the Math Dept), Lake Laverne, Memorial Union, Hilton Colliseum, CY Stevens Auditorium, Jack Trice Stadium can all be seen (as can many others). 
ISU from the air

snorkel with stingrays in Bora Bora
manta raymanta ray

Pitons from Delta 339
Landing YYJ



         Leslie@AIM           San Diego Marriott lobby art