# ISU Discrete Math Seminar

### Archive

Back to Spring 2023#### Fall 2022

**September 13**JD Nir (Toronto Metropolitan University)

**The Benevolent Turán graph: All graphs are Turán-good**

**September 20**Andrea Freschi (University of Birmingham)

**The induced saturation problem for posets**

**September 27**Sean English (University of North Carolina Wilmington)

**Lower bounds on generalized Ramsey numbers via color energy**

**October 11**Enrique Gomez-Leos (Iowa State University)

**A new infinite family of equiisoclinic tight fusion frames**

**October 18**Henry Simmons (Iowa State University)

**Regular Graphs with Extremal Rigidity Properties**

**October 25**Joel Jeffries (Iowa State University)

**Can you hear the shape of a tree?**

**November 1**Ruth Luo (University of South Carolina)

**Minimum degree conditions ensuring the existence of long cycles in hypergraphs**

**November 8**Anna Halfpap (University of Montana)

**Rational exponent questions for generalized extremal numbers**

**November 29**Vic Bednar (Virginia Commonwealth University)

**An Upper Bound on the Rainbow Turán Number for Trees**

**December 6**Ryan Cushman (University of Wisconsin - Eau Claire)

**The Erdős-Gyárfás function $f(n,4,5)$**

#### Spring 2022

**March 22**Jason McCullough (Iowa State University)

**Chow rings, chromatic polynomials, geometric lattices, and more**

**March 29**Matt Superdock (Rhodes College)

**Small simplicial complexes with fundamental group $\mathbb{Z}^{n}$**

**April 8**Misha Lavrov (Kennesaw State University)

**Fantastic cycles and why we would want to find them**

**April 12**Balázs Patkós (Alfréd Rényi Institute of Mathematics)

**$Q$-ary generalizations of set intersection and extremal graph theoretic problems**

**April 26**Zoe Wellner (Carnegie Mellon University)

**Colorful Borsuk-Ulam Results, Their Generalizations and Applications**

**May 3**RTG group report

**On Sign Patterns of Row Orthogonal Matrices**

#### Fall 2021

**September 2**Chris Cox (Iowa State University)

**A toadally ribbeting and unfrogettable tale of longest common subsequences**

**September 9**Bryan Curtis (Iowa State University)

**Sign Patterns of Row Orthogonal Matrices**

**September 30**Ting-Wei Chao (Carnegie Mellon University)

**Finite Field Kakeya Problem**

**October 14**József Balogh (University of Illinois Urbana–Champaign)

**Improved upper bounds on the size of Sidon sets**

**October 21**Boris Bukh (Carnegie Mellon University)

**Extremal graphs without exponentially-small bicliques**

**November 29**Zhanar Berikkyzy (Fairfield University)

**Long cycles in Balanced Tripartite Graphs**

**December 2**Daniel McGinnis (Iowa State University)

**Ehrhart theory of paving and panhandle matroid polytopes**

#### Spring 2021

**February 4**Chris Cox (Iowa State University)

**The maximum number of paths and cycles in planar graphs**

**March 4**Jüergen Kritschgau (Iowa State University)

**Rainbow problems on groups and graphs (PhD Defense)**

**March 11**Dan Cranston (Virginia Commonwealth University)

**In Most 6-regular Toroidal Graphs All 5-colorings are Kempe Equivalent**

**March 25**Kate Lorenzen (Iowa State University)

**Cospectral constructions and spectral properties of variations of the distance matrix (PhD Defense)**

**April 1**Lauren Keough (Grand Valley State University)

**Distinguishing colorings and determining sets for Mycielskian graphs**

**April 15**Allison Beemer (University of Wisconsin–Eau Claire)

**When cut-sets don't cut it: bounds on adversarial network capacity**

**April 29**József Balogh (University of Illinois Urbana–Champaign)

**On Robustness of The Erdős–Ko–Rado Theorem**