# Discrete Math Seminar

**Day: Every Friday**

**Time: 2:00 pm**

Location: Derrick Hall 237

Location: Derrick Hall 237

All faculty, graduate students, and upper level undergraduate students are welcome. The seminar will provide a platform for faculty and students to present their research developments in discrete mathematics and related areas, foster research interactions among faculty and students, and create research opportunities and collaborations for faculty and students. Speakers from Discrete Mathematics, Combinatorics, Computer Science, and other related areas are all welcome. We are particularly interested in interdisciplinary research which applies mathematics as a tool to solve problems in other areas such as CS, BioInformatics, Bio‐sciences, Engineering, Physics, Chemistry, etc.

### Spring 2018

- Jan 24:
**Mark Lewis**, Kent State University, Semi-extraspecial Groups - Feb 2:
**Yong Yang**, Texas State University, On largest conjugacy class size, largest character degree and subgroups of finite groups - Feb 9:
**Bo Lin**, University of Texas at Austin, Tropical Fermat-Weber point - Feb 16:
**Suho Oh**, Texas State University, Weyl groups, Schubert varieties and hyperplane arrangements - Feb 23:
**Klaus Lux**, University of Arizona, The 3-modular Character Table of the Fischer Group Fi23 - March 2:
**Art Duval**, UT-El Paso, Matroids and statistical dependency Matroids and statistical dependency - March 9:
**Yanxiong Yan**, Texas State University, A New Characterization of Some Finite Almost Simple Groups - March 23:
**Chunmei Wang**, Texas State University, Primal-Dual Weak Galerkin Finite Element Methods for PDEs - March 30:
**Eugene Curtin**, Texas State University, Matrix-Tree Generalizations via Modified Grassmann Variables - April 6:
**Hua Wang**, Georgia Southern University, Patterns and parts of compositions and cyclic compositions - April 20:
**Anton Dochtermann**, Texas State University, Chordal graphs and complexes, with a view towards commutative algebra and data clustering - April 27:
**Ngoc Tran**, UT-Austin, Tell the truth and never lose with tropical geometry

### Fall 2017

- Sep 8:
**Alex Fink**, Queen Mary University of London, The Tutte polynomial via lattice point enumeration - Sep 15:
**No seminar** - Sept 22:
**Anton Dochtermann** - Sept 29:
**Ivan Ojeda-Ruiz** - Oct 6:
**Damian Valles**, Ingram School of Engineering - Oct 13:
**Dan Tamir**, Department of Computer Science - Oct 20:
**Lucas Rusnak**, Texas State University, Natural Generalizations of Graphs Part I: Graphs, Oriented hypergraphs, and integer matrices - Oct 27:
**William Grilliette**, Texas State University, Natural Generalizations of Graphs Part II: Commas, Topoi, & Homomorphisms - Nov 3:
**Roberto Barrera**, A finiteness result for local cohomology modules of Stanley-Reisner rings - Nov 10:
**Graduate Open House / Math Symposium** - Nov 17:
**Robert Mc****Almon**, Texas State University (Graduate Student), Rank Symmetry in Lower Bruhat Intervals of Finite Coxeter Groups - Nov 24:
**Thanksgiving Holiday (No seminar talk)** - Dec 1:
**Jinbao Li**, Texas State University, On properties of subgroups and solubility of finite groups

### Spring 2017

- Feb 3:
**Randy Davila**, University of Johannesburg/Texas State University, Binding independence and domination with annihilation and sub-domination - Feb 10:
**Yong Yang**, Texas State University, On*p*-parts of character degrees of finite groups - Feb 17:
**Lucas Rusnak**, Texas State University, Developments in Oriented Hypergraphs - Mar 3:
**Suho Oh**, Texas State University, Introduction to Total Positivity - Mar 10:
**David Xiang**, Westwood High School, Flats of a positroid - Mar 24:
**Anton Dochterman**, Texas State University, Parking functions, subset chip-firing, and syzygies of monomial ideals - Mar 31:
**Yue Cai**, Texas A&M, q-Stirling numbers: A new view - Apr 14:
**John Asplund**, Dalton State College, Vertex-Colouring and the Limits of Edge-Colouring Techniques - Apr 21:
**Thai Hoang Le**, University of Mississippi, Additive bases in groups - Apr 28:
**Randy Davila**, Texas State University, Total Forcing in Graphs