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

Professor Emerita Department of Mathematics former Associate Dean for Graduate Studies and Faculty Development College of Liberal Arts and Sciences Iowa State University Ames, IA 50011

Ajunct Professor (courtesy appointment) Department of Mathematics Purdue University West Lafayette, IN 47907

CV Research Books Grad Students Holl Chair Education and Outreach  Wikipedia page  Other

• Research Publications                                    ISU Math Research Highlights
  

• Research Training Group: Combinatorics, Computation and Applications at Iowa State University
• Graduate Research Workshop in Combinatorics (GRWC)   former site
• ISU Early Graduate Research (EGR)
• Iowa State Math Research Teams (ISMaRT) academic year undergraduate research for ISU students
  
• ISU Math Summer Research Experiences for Undergraduates   article about ISU REU

• ISU Discrete Math Seminar

• Linear Algebra and Its Applications (LAA)       
• Electronic Journal of Linear Algebra (ELA)     
• Minnesota Journal of Undergraduate Mathematics (MJUM)     

• International Linear Algebra Society (ILAS)
• ILAS 2017 Connections

• American Institute of Mathematics         AIM staff      AIM Research Experiences for Undergraduate Faculty (REUF) Program
• Inverse Eigenvalue Problem of a Graph & Zero Forcing AIM Research Community (ARC)
• AIM Workshop: Zero forcing and its applications
• AIM Workshop: Exact crossing numbers
  
• AIM Workshop: Nonnegative matrix theory
  
• AIM Workshop: Spectra of families of matrices described by graphs, digraphs, and sign patterns, Oct. 23-27, 2006

• Workshop for Women in Graph Theory and Applications (WIGA) at IMA
  
• IMA Discrete structures Year 2014-201 RTC (IMA Vol)   ISU@IMA pix
• IMA PI graduate summer program Linear Algebra and Applications 2008
• Topics in Linear Algebra Conference 2002 (IMA PI conference)

• BIRS FRG The Inverse Eigenvalue Problem of a Graph 2016  BIRS FRG 2016 pix
  
• BIRS FRG Minimum Rank, Maximum Nullity, and Zero Forcing of Graphs 2013
• BIRS FRG Eventually Nonnegative Matrices and their Sign Patterns 2011
• BIRS Workshop Theory and Applications of Matrices described by Patterns 2010  Schedule

• AMS Mathematics Research Communities
• IEP-G & Zero Forcing MRC (Finding needles in haystacks)
  
• AMS Spring 2013 Central Section Meting at ISU
  

• Women in Graph Theory and Applications AWM Research Network (WIGA)
• Association for Women in Mathematics (AWM)      
• 2020 AWM Fellows
• Iowa State University Student Chapter of the Association for Women in Mathematics      EDGE@ISU     Joint AWM MOCA Seminar Series (JAMSS)

• NSF-CBMS Regional Conference:The Mutually Beneficial Relationship of Matrices and Graphs 2010
• Atlantic Association for Research in the Mathematical Sciences (AARMS)     

Authors: Leslie Hogben, Iowa State University Jephian C.H. Lin, National Sun Yat-Sen University Bryan L. Shader, University of Wyoming American Mathematical Society, (c) 2022.

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.

Editors: Daniela Ferrero, Texas State University Leslie Hogben, Iowa State University Sandra R. Kingan, Brooklyn College Gretchen Matthews, Virginia Institute of Technology Springer, (c) 2021.

Editors: 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 CRC Press, (c) 2020

Editors: 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.

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Postdocs and Graduate Students

Postdoctoral Associates

Dr. Bryan Curtis                     2021-            RTG postdoc
Dr. Jesse Geneson                  2018-2020    Rand Corp. and Asst. Prof, San Jose State University (on leave)           
Dr. Michael Young                 2010-2014    Assoc. Prof. & Assoc. Dean, Carnegie-Mellon University             
Dr. Minerva Catral                 2009-2010    Assoc. Prof., Xavier University
Dr. Jason Grout                      2007-2009    Bloomberg (Jupyter Lab)

Ph. D.
Zac Brennan                         current               (joint with David Herzog)
Esther Conrad                       2022 NASA  Propagation processes on graphs and applications            (joint with Kristin Y. Rozier)
Michael Ross                         2022            Propagation processes: full throttling and probabilistic zero forcing
Carolyn Reinhart                   2021  Vis. Asst. Prof., Swarthmore College   The distance matrix and its variants for graphs and digraphs
Beth Bjorkman                      2020   Air Force Research Lab Variations on the power domination problem: Hypergraphs and robustness
Joshua Carlson                     2019   Asst. Prof., Drake University  A method for characterizing graphs with specified throttling numbers
Derek Young                        2019   Asst. Prof., Mt. Holyoke College Techniques for determining equality of the maximum nullity and the zero forcing number of a graph
Michael Dairyko                   2018  Milwaukee Bucks   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 Vis. Asst. Prof., Bates College  Principal rank characteristic sequences      
Jephian Chin-Hung Lin        2017  Assoc. 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   SRC  A fractional approach to minimum rank and zero forcing
Nicole Kingsley                    2015  Lect., Rochester Institute of Technology  Skew propagation time
Brian Lois                            2015  Walmart   Correctness results for on-line robust principal components analysis   (joint with Namrata Vaswani)
Nathan Warnberg                2014  Assoc. Prof., U Wisconsin-LaCrosse  Positive semidefinite propagation time
Craig Erickson                     2014  Amazon  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  Assoc. 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 (completed PhD at 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
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

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Dio Lewis Holl Chair in Applied Mathematics

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Education and Outreach

I taught for more than 40 years at ISU but am no longer teaching.  Improving mentoring of graduate students, postdoctoral 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

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ISU Mathematics Department wins 2015 American Mathematical Society Award for an Exemplary Program or Achievement in a Mathematics Department Citation AMS Notices article Dean Schmittmann presents the award in photo at left

  
 

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

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Fall 2014 at Institute for Mathematics and its Applications (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)

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Other

• Family: Mark Hunacek   Adrienne Hunacek Miller  Jeremy Miller
  
• My favorite travel blog
• MAA's Found Math

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April 8, 2024 total solar eclipse as seen from Indianapolis Motor Speedway

stingray (above) and turtle (below) St. Croix US Virgin Islands


 



Iowa State University seen flying from MSP to DSM 4/7/18. Carver Hall (home of the Math Dept), Lake Laverne, Memorial Union, Hilton Coliseum, CY Stevens Auditorium, Jack Trice Stadium can all be seen (as can many others). 




 

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