IMI Interdisciplinary Mathematics InstituteCollege of Arts and Sciences

## 2021

 Fri Oct 22 , 2:30pmAnton Bernshteyn Georgia Institute of Technology Counting colorings of triangle-free graphs Fri Oct 15 , 2:30pmZhiyu Wang Georgia Institute of Technology Polynomial χ-binding functions for graph classes Fri Oct 01 , 2:30pmXiaofan Yuan Georgia Tech Coloring graphs containing no K_5-subdivision Fri Sep 24 , 2:30pmFelix Lazebnik University of Delaware Graphs without short cycles and asymmetric lifts Fri Sep 17 , 2:30pmJustin Troyka Davidson College Split graphs: Combinatorial species and asymptotics Fri Sep 10 , 2:30pmJoshua Cooper University of South Carolina Two Equators of the Permutohedron Fri Sep 03 , 2:30pmAndrew Meier University of South Carolina Anti-Ramsey number of edge-disjoint rainbow spanning trees in all graphs Fri Apr 16 , 2:30pmBridget Tenner DePaul University Permutations and pinnacle sets Fri Apr 09 , 2:30pmJoshua Cooper University of South Carolina The structural of maximal non-biconnected unit distance graphs in the plane Fri Apr 02 , 2:30pmLionel Levine Cornell University Abelian Sandpiles and Abelian Networks Fri Mar 26 , 2:30pmMike Tait Villanova University Spectral Turán problems Fri Mar 05 , 2:30pmGrant Fickes University of South Carolina Recurrence Ranks of Sequences Fri Feb 26 , 2:30pmLina Li University of Waterloo Tilings in vertex ordered graphs Fri Feb 19 , 2:30pmEwan Davies University of Colorado, Boulder Independent sets of fixed size Fri Feb 12 , 2:30pmChris Cox Iowa State University The maximum number of paths and cycles in planar graphs Fri Feb 05 , 2:30pmJane Ivy Coons North Carolina State University Toric Geometry of the Cavender-Farris-Neyman Model with a Molecular Clock Fri Jan 29 , 2:30pmLinyuan Lincoln Lu University of South Carolina Ricci Curvature and Ricci flow on Weighted Graphs Fri Jan 22 , 2:30pmSebastian Cioaba Addressing graphs and hypergraphs

## 2020

 Fri Dec 04 , 2:30pmStephen Smith University of South Carolina Is the induced subtanglegram relation a well quasi order? Fri Nov 20 , 3:30pmAndrew Schwartz Southeast Missouri State University Zero Forcing Sets in H-matchable Graphs Fri Nov 13 , 2:30pmRigoberto Flórez The Citadel Some enumerations on non-decreasing Dyck paths Fri Nov 06 , 2:30pmGuangming Jing Augusta University TBA Fri Oct 30 , 2:30pmJaime Radcliffe University of Nebraska - Lincoln Extremal problems for clique counting Fri Oct 23 , 3pmMiklós Bóna University of Florida A method to prove that the solution to some enumeration problems is a non-rational generating function Fri Oct 16 , 2:30pmJohn Wierman Johns Hopkins University An improved lower bound for the site percolation threshold of the hexagonal lattice Fri Oct 09 , 2:30pmAustin Mohr University of Nebraska Wesleyan Checking Hats with the Lopsided Lovasz Local Lemma Fri Oct 02 , 2:30pmDavid Galvin Notre Dame University Independent set permutations and matching permutations Fri Sep 25 , 2:30pmAlexander Wiedemann Davidson College The restricted numerical range of the digraph Laplacian Fri Sep 18 , 2:30pmRyan Martin Iowa State University Splits with Forbidden Graphs Fri Sep 11 , 2:30pmHe Guo Georgia Institute of Technology Packing nearly optimal Ramsey R(3,t) graphs Fri Sep 04 , 2:30pmAlex Neal Riasanovsky Iowa State University On the edit distance function of random graphs Fri Aug 28 , 2:30pmJoshua Cooper University of South Carolina Around the Brouwer Conjecture, Part III: Failure for Signed Graphs Fri Mar 06 , 2:30pmTrevor Olsen University of South Carolina Wiener Index in Triangulations and Quadrangulations Fri Feb 28 , 2:30pmJoshua Cooper University of South Carolina Around the Brouwer Conjecture, Part II Fri Feb 21 , 2:30pmDavid Galvin Notre Dame University Total non-negativity of some combinatorial matrices Fri Feb 14 , 2:30pmGábor Hetyei University of North Carolina, Charlotte The number of partitions of a fixed genus Fri Feb 07 , 2:30pmJoshua Cooper University of South Carolina Around the Brouwer Conjecture Fri Jan 31 , 2:30pmGarner Cochran Berry College A bound on the oriented diameter of graphs given minimum degree and girth Fri Jan 24 , 2:30pmInne Singgih University of South Carolina Diameter of 3-colorable graphs

## 2019

 Fri Nov 22 , 2:30pmKevin Hutson Furman University Investigating γ-Graphs Fri Nov 15 , 2:30pmLarie Ward Georgia Southern University Operators Grow on Trees Tue Nov 05 , 1:30pmXing Peng Tianjin University An extension of Erdos-Gallai theorem Fri Oct 25 , 2:30pmBrad Elliot Emory University On Degree-Sums and Chorded Cycles Fri Oct 18 , 2:30pmAlex Lazar University of Miami The Homogenized Linial Arrangement and Genocchi Numbers Fri Oct 04 , 2:30pmHua Wang Georgia Southern University Packing patterns in permutations and more Fri Sep 27 , 2:30pmJoshua Cooper University of South Carolina Characteristic Power Series of Graph Limits Fri Sep 20 , 2:30pmGuangming Jing Augusta University The Goldberg-Seymour Conjecture and Gupta's Co-density Conjecture Fri Sep 13 , 2:30pmLinyuan Lincoln Lu University of South Carolina Ricci-curvature of graphs Fri Sep 06 , 2:30pmArran Hamm Winthrop University Ramsey and star-critical Ramsey numbers involving generalized fans Fri Aug 30 , 2:30pmÉva Czabarka University of South Carolina Midrange crossing constant(s) Fri Apr 12 , 2:30pmZhiyu Wang Georgia Institute of Technology Find Berge hypergraphs by looking at the shadow Fri Apr 05 , 2:30pmHeather Smith Davidson College Separating the Tree-Chromatic Number from the Path-Chromatic Number Fri Mar 29 , 2:30pmJoshua Thompson University of South Carolina Poset Ramsey Numbers for Boolean Lattices Fri Mar 22 , 2:30pmJosiah Reiswig University of South Carolina On the $k$-Steiner radius and $k$-Steiner Diameter of a graph with $k\geq 5$ Fri Mar 01 , 2:30pmElena S. Dimitrova Clemson University Unique Reduced Gröbner Bases of Ideals of Points Fri Feb 22 , 2:30pmDaniel Pade University of South Carolina Complexity of Regex Crosswords Fri Feb 15 , 2:30pmRigoberto Flórez The Citadel Projective Rectangles Fri Feb 08 , 2:30pmMichael Levet University of South Carolina Graph Homomorphisms and Vector Colorings Fri Feb 01 , 2:30pmGregory Clark University of South Carolina Low Codegree Coefficients of the Characteristic Polynomial of a Hypergraph Fri Jan 25 , 2:30pmJoshua Cooper University of South Carolina The P-Machine, A Random-Like Deterministic Process

## 2018

 Fri Nov 16 , 2:30pmInne Singgih University of South Carolina Bounding the Metric Dimension of a Graph Fri Nov 09 , 2:30pmPeter Gartland University of South Carolina A new Characterization of V-Posets Fri Nov 02 , 2pmAdam Gregory Western Carolina universityRisto Atanasov Western Carolina UniversityKeller Vandebogert University of South CarolinaPatrick McFaddin University of South CarolinaTodd Wittman College of CharlestonJesse Kass University of South CarolinaMohammed Ghomi Georgia Tech CMS and MAA State Dinner Fri Oct 26 , 2:30pmLinyuan Lincoln Lu University of South Carolina The maximum p-Spectral Radius of Hypergraphs with m Edges Fri Oct 12 , 2:30pmRigoberto Flórez The Citadel The strong divisibility property and the resultant of generalized Fibonacci polynomials Fri Oct 05 , 2:30pmZhiyu Wang Georgia Institute of Technology Ramsey numbers of Berge-hypergraphs and related structures Fri Sep 28 , 2:30pmLin Yixin University of South Carolina A rectangle tacking problem Fri Sep 21 , 2:30pmJoshua Thompson University of South Carolina The discharging method and r-hued coloring of sparse graphs Fri Sep 14 , 2:30pmJoshua Cooper University of South Carolina CANCELLED: A Generalization of the Harary-Sachs Theorem to Hypergraphs Fri Sep 07 , 2:30pmGregory Clark University of South Carolina On the Computation of the Characteristic Polynomial of a Hypergraph Fri Aug 31 , 2:30pmLászló Székely University of South Carolina Using block designs in crossing number bounds Fri Apr 27 , 2:30pmDaphne Der-Fen Liu California State University, Los Angeles Density of Sequences with Forbidden Separations Fri Apr 20 , 2:30pmErin Hanna University of South Carolina A Quest for Positive Definite Matrices in Finite Fields (a work in progress) Mon Apr 16 , 4pmPeter Dankelmann University of Johannesburg The Diameter of Graphs and Digraphs Fri Apr 13 , 2:30pmChristopher Edgar University of South Carolina Transfer Entropy in Continuous Time Fri Apr 06 , 2:30pmJerrold R. Griggs University of South Carolina Spanning Trees with Many Leaves in Hypercubes Mon Mar 26 , 4pmAaron Dutle NASA Langley Research Center Detecting Low Weight Circuits in Posemigroup Edge-Weighted Digraphs Fri Mar 02 , 2:30pmHays Whitlatch Gonzaga University Do These Cholesky Roots Make My Matrix Look Fat? Fri Feb 16 , 2:30pmLászló Székely University of South Carolina An Algebraic Monte-Carlo Algorithm for the Partition Adjacency Matrix Realization Problem Fri Feb 09 , 2:30pmInne Singgih University of South Carolina Vertex magic total labelings of 2-regular graphs Fri Feb 02 , 2:30pmGregory Clark University of South Carolina A Combinatorial Description for the Coefficients of the Adjacency Characteristic Polynomial of a Hypergraph

## 2017

 Fri Dec 08 , 2:30pmJoshua Cooper University of South Carolina Adjacency Spectra of Hypertrees and other Hypergraphs with Few Eigenvalues Fri Dec 01 , 2:30pmAnton Strizhov University of South Carolina One-dimensional support vector machine and its connection to random Ferrers diagrams Fri Nov 17 , 2:30pmHeather Smith Davidson College Local dimension and the size of a poset Fri Nov 10 , 2:30pmArran Hamm Winthrop University On the Triangle Space of Random Graphs Fri Nov 03 , 2:30pmAxel Brandt Davidson College Extremal Graph Theory with Flag Algebras Fri Oct 13 , 2:30pmJoshua Cooper University of South Carolina Graph Pressing Sequences and Binary Linear Algebra, Updated Fri Oct 06 , 2:30pmLele Liu Shanghai University Spectral Radius and Degree Sequences of Uniform Hypergraphs Fri Sep 29 , 2:30pmJerrold R. Griggs University of South Carolina Poset-free Families of Subsets Fri Apr 21 , 2:30pmJames McKeown University of Miami Coxeter Groups, The Waldspurger Decomposition, and Alternating Sign Matrices Fri Apr 14 , 2:30pmJoshua Cooper University of South Carolina Deducing Vertex Weights from Empirical Occupation Times Fri Apr 07 , 2:30pmClifford Smyth University of North Carolina, Greensboro Combinatorial formulas for restricted Stirling and Lah number matrices and their inverses Fri Mar 31 , 2:30pmÉva Czabarka University of South Carolina Number of nonisomorphic subtrees and inducibility concepts in trees Fri Mar 24 , 2:30pmHays Whitlatch Gonzaga University A Characterization of Uniquely Pressable Simple Pseudo-Graphs Fri Mar 17 , 2:30pmDavid Galvin Notre Dame University Taxi walks and the hard-core distribution on $\mathbb{Z}$^2 Thu Mar 16 , 4:30pmDavid Galvin Notre Dame University Independent sets in regular graphs Fri Feb 24 , 2:30pmMichael Levet University of South Carolina Quaternionic Quantum Walks Fri Feb 17 , 2:30pmRyan Martin Iowa State University Methods in the computing the edit distance function Thu Feb 16 , 4:30pmRyan Martin Iowa State University Introduction to the edit distance in graphs Fri Feb 10 , 2:30pmInne Singgih University of South Carolina DNA Graph Characterization for Line Digraph of Dicycle With One Chord Fri Feb 03 , 2:30pmAnton Strizhov University of South Carolina An application of graph theory in numerical analysis Fri Jan 27 , 2:30pmJosiah Reiswig University of South Carolina k-Dependence on Hexagonal Boards Fri Jan 20 , 2:30pmGarner Cochran Berry College Polynomial Chebyshev Quotients, Combinatorially

## 2016

 Fri Dec 02 , 2:30pmBill Kay Emory University Property O of Oriented Hypergraphs Fri Nov 18 , 2:30pmJason O'Kane University of South Carolina Algorithmic Questions on Combinatorial Filters Fri Nov 11 , 2:30pmVirginia Johnson Columbia College Areas of triangles and other polygons with vertices from various sequences Fri Nov 04 , 2:30pmHeather Smith Davidson College Saturation for Induced Subsets Fri Oct 28 , 2:30pmBrittney Ellzey University of Miami The Chromatic Quasisymmetric Functions of Directed Graphs Fri Oct 07 , 2:30pmGarner Cochran Berry College A Combinatorial Chebyshev equality for d-Matching Polynomials Fri Sep 30 , 2:30pmAnn Clifton University of South Carolina Price of Anarchy for Graph Coloring Games Fri Sep 23 , 2:30pmMichael Levet University of South Carolina Polynomial-time Isomorphism Test for Groups with Abelian Sylow Towers Fri Sep 16 , 2:30pmJoshua Cooper University of South Carolina Throwing a Ball as Far as Possible, Revisited Fri Sep 09 , 2:30pmLinyuan Lincoln Lu University of South Carolina Normalized Laplacian Tensor and Isoperimetric Inequalities for Uniform Hypergraphs Fri Apr 22 , 2:30pmRobert Hough Institute for Advanced Study Random walk on unipotent groups Tue Apr 19 , 4:30pmChris Rodger Auburn University Amalgamations and Hamilton Decompositions and symmetric Sudoku squares Fri Apr 15 , 2:30pmGarrett Mitchener College of Charleston The search for $\mathrm{BOBIBD}(9,5,5,4,3)$ Fri Apr 08 , 2:30pmShuliang Bai University of South Carolina Classifying degenerate $\{2,3\}$-hypergraphs and 2-colored graphs Fri Apr 01 , 2:30pmDoug Rall Furman University Game Total Domination and Total Dominating Sequences Fri Mar 18 , 2:30pmSteve Butler Iowa State University Edge flipping on the complete graph Fri Mar 04 , 2:30pmLauren Keough Davidson College Independent Sets in Hypergraphs Fri Feb 26 , 2:30pmHua Wang Georgia Southern University Integer compositions: subword patterns and parts Fri Feb 19 , 2:30pmDaniel Gray Georgia Southern University Superpatterns and Generalizations of Layered Permutations Fri Feb 12 , 2:30pmRigoberto Flórez The Citadel Projective Representation of Non-Representable Matroids (of Biased Graphs) Fri Feb 05 , 2:30pmStephen Fenner University of South Carolina Bipartite Perfect Matching is in quasi-NC Fri Jan 22 , 2:30pmIan Roberts Charles Darwin University Various problems on finite set systems Fri Jan 15 , 2:30pmAnton Strizhov University of South Carolina Threshold graphs, shifted complexes and graphical complexes (II)

## 2015

 Mon Nov 30 , 3:30pmAnton Strizhov University of South Carolina Threshold graphs, shifted complexes and graphical complexes Mon Nov 23 , 3:30pmStephan Wagner Stellenbosch University Shape of Tanglegrams Mon Nov 09 , 3:30pmGarner Cochran Berry College A Combinatorial Model for RNA Folding Mon Nov 02 , 3:30pmMarco Valtorta University of South Carolina Parameter Identifiability of Discrete Bayesian Networks with Hidden Variables Mon Oct 26 , 3:30pmJerrold R. Griggs University of South Carolina Tiling the n-cube Graph with Copies of a Given Graph Mon Oct 19 , 3:30pmGregory Clark University of South Carolina On de Bruijn Sequences with Varying Combs Mon Oct 12 , 3:30pmMichael Levet University of South Carolina Network Structure and Activity in Boolean Networks Mon Sep 28 , 3:30pmJoshua Cooper University of South Carolina Generalized De Bruijn Cycles Mon Sep 21 , 3:30pmLinyuan Lincoln Lu University of South Carolina Laplacian Spectra for Random Graphs and Hypergraphs Mon Sep 14 , 3:30pmRyan Causey University of South Carolina Coloring members, pairs, and chains in trees Mon Aug 31 , 3:30pmJoshua Cooper University of South Carolina Spectra of Random Hypergraphs and the Symmetric Bernoulli Hyperensemble Fri Apr 24 , 2:30pmEdward Boehnlein University of South Carolina Computing Diffusion State Distance using Green's Function and Heat Kernel on Graphs Fri Apr 17 , 2:30pmDaniel Rorabaugh University of South Carolina Doubled-Word Density Distribution Fri Apr 10 , 2:30pmSvetlana Poznanovikj Clemson University Maximal chains in fillings of moon polyominoes Fri Apr 03 , 2:30pmHeather Smith Davidson College On the Computational Complexity of Genome Rearrangement Fri Mar 20 , 2:30pmTom Trotter Georgia Institute of Technology Analogies between Dimension and Chromatic Number Fri Feb 27 , 2:30pmIoannis Rekleitis University of South Carolina Algorithmic Problems Related to Robotics Fri Feb 20 , 2:15pmJohann Makowsky Technion- Israel Institute of Technology Why is the chromatic polynomial a polynomial? Fri Feb 13 , 2:30pmGábor Hetyei University of North Carolina, Charlotte Counting permutations and partitions of genus one Fri Feb 06 , 2:15pmLászló Székely University of South Carolina Markov chains on Abelian groups provide constructions for the diamond problem Fri Jan 30 , 2:30pmWei-Tian Li National Chung-Hsing University, Taiwan Intersecting $k$-uniform families containing all the $k$-subsets of a given set Fri Jan 23 , 2:15pmStephen Fenner University of South Carolina The complexity of some regex crossword problems

## 2014

 Fri Dec 05 , 2:30pmWei Li Fujian Agriculture and Forestry University Hypergraph Expander Mixing Lemma Fri Nov 21 , 2:30pmRigoberto Flórez The Citadel Counting non-decreasing Dyck paths Fri Nov 14 , 2:30pmTaylor Short University of South Carolina An extremal problem related to degree sequences of graphs Fri Nov 07 , 2:30pmRao Li University of South Carolina Aiken Spectral Conditions for Some Hamiltonian Properties of Graphs Fri Oct 31 , 2:30pmAnn Clifton University of South Carolina Lower Bound for the Packing Chromatic Number of Cubic Graphs Fri Oct 17 , 2:30pmGarner Cochran Berry College Generating functions and Wilf equivalence for generalized interval embeddings Fri Oct 03 , 2:30pmKayvan Sadeghi Carnegie Mellon University A Connection between Networks, Graphical Models, and Exchangeability Fri Sep 26 , 2:30pmDaniel Rorabaugh University of South Carolina Combinatorial Nullstellensatz Fri Sep 19 , 2:30pmLászló Székely University of South Carolina $k$-planar crossing numbers Fri Sep 12 , 2:30pmLinyuan Lincoln Lu University of South Carolina Unavoidable Multicoloured Families of Configurations Fri Sep 05 , 2:30pmJoshua Cooper University of South Carolina The Complexity of Counting Poset and Permutation Patterns Fri Apr 25 , 11amShoudong Man China Connected Hypergraphs with Small Spectral Radius Fri Apr 18 , 11amE.S. Mahmoodian Sharif University of Technology, Tehran Some Hypercube Problems and Conjectures Fri Apr 11 , 11amDespina Stasi Illinois Institute of Technology Hydras: Horn formulas and directed hypergraphs Fri Mar 28 , 11amTaylor Short University of South Carolina Towards Vizing's Independence Number Conjecture Fri Mar 21 , 11amDaniel Rorabaugh University of South Carolina Probabilistic Bounds on Zimin Word Avoidance Fri Mar 07 , 11amJoshua Cooper University of South Carolina Sudoku and Graphs: Critical Sets Fri Feb 28 , 11amEdward Boehnlein University of South Carolina Subgraphs in Random Non-uniform Hypergraphs Fri Feb 21 , 11amMichael Griffin Emory University A framework of Rogers-Ramanujan identities and their arithmetic properties Fri Feb 07 , 11amLinyuan Lincoln Lu University of South Carolina Graphs and Hypergraphs with Small Spectral Radius

## 2013

 Mon Nov 25 , 3:15pmDaniel Rorabaugh University of South Carolina Bounds on Zimin Word Avoidance Mon Nov 18 , 3:15pmHua Wang Georgia Southern University Extremal values of ratios: distances vs. number of subtrees in trees Mon Nov 11 , 3:15pmJoshua Cooper University of South Carolina The Discrepancy of the Lexicographically Least de Bruijn Cycle Mon Oct 28 , 3:15pmAndrew Dove University of South Carolina Packing posets in a family of subsets Mon Oct 21 , 3:15pmWilliam DeMeo University of South Carolina Approximating eigenvalues of large stochastic matrices Mon Oct 14 , 4pmStephen Fenner University of South Carolina Fixed parameter extrapolation and quasicrystals in the plane Mon Oct 07 , 3:15pmKara Shavo Presbyterian College Classifying Coloring Graphs Mon Sep 30 , 3:15pmFang Tian Shanghai University of Finance and Economics $k$-separated matching and edge coloring numbers in sparse random graphs Mon Sep 23 , 3:15pmJoshua Cooper University of South Carolina When is counting linear extensions easy? Mon Sep 16 , 3:15pmTravis Johnston University of Delaware Connecting Turan Problems on Hypergraphs to Forbidden Subposet Problems Mon Sep 09 , 3:15pmLinyuan Lincoln Lu University of South Carolina Repeated columns and an old chestnut Fri May 17 , 11amBaogang Xu Georgia Institute of Technology On judicious bisection of graphs Thu Apr 25 , 2:15pmWilliam Cole Franks University of South Carolina Graph Labeling with Distance Conditions Thu Apr 18 , 3:30pmTravis Johnston University of Delaware Hypergraph Jumps and the Lagrange Polynomial Thu Mar 28 , 2pmRichard Anstee University of British Columbia, Canada Applications of Linear Algebra to Forbidden Configurations Thu Mar 21 , 3:45pmDaniel Grier University of South Carolina The Difficulty of Finding Winning Strategies for Poset Games Mon Mar 04 , 2pmStephen Fenner University of South Carolina Two-level poset games Thu Feb 28 , 3:30pmJoshua Cooper University of South Carolina The Spectrum of the All-Ones Hypermatrix Thu Feb 21 , 2pmRichard Anstee University of British Columbia, Canada Forbidden Families of Configurations Thu Feb 07 , 3:30pmAaron Dutle NASA Langley Research Center Joint Degree Matrices Thu Jan 31 , 2pmRichard Anstee University of British Columbia, Canada Forbidden Submatrices

## 2012

 Wed Dec 05 , 3:30pmCliff Gaddy University of South Carolina A Variant of the Hypergraph Removal Lemma Wed Nov 14 , 3:30pmTravis Johnston University of Delaware Turan Problems on Non-uniform Hypergraphs Wed Nov 07 , 3:30pmAndrew Dove University of South Carolina Supersaturation in the Boolean Lattice Wed Oct 31 , 3:30pmAndrew Dove University of South Carolina Hamiltonian Cycles and Symmetric Chains in Boolean Lattices Wed Oct 24 , 3:30pmÉva Czabarka University of South Carolina The Convex Hull Method II. Wed Oct 17 , 3:30pmÉva Czabarka University of South Carolina The Convex Hull Method I. Wed Oct 10 , 3:30pmLászló Székely University of South Carolina Threshold functions for distinct parts: revisiting Erdős-Lehner Thu Oct 04 , 1pmGyula Katona Hungarian Academy of Sciences Towards a structured Baranyai theorem Wed Sep 26 , 3:30pmAaron Dutle NASA Langley Research Center Graph Odometry Wed Sep 19 , 3:30pmLinyuan Lincoln Lu University of South Carolina Turán Problems on Non-uniform Hypergraphs Wed Sep 12 , 3:30pmLinyuan Lincoln Lu University of South Carolina On crown-free families of subsets Tue Apr 24 , 3pmBill Kay University of South Carolina The Algorithmic Local Lemma Tue Apr 24 , 2pmDavid Collins University of South Carolina Consistent Hashing: an overview and some thoughts Mon Apr 23 , 3:50pmColton Magnant Georgia Southern University Partitions with prescribed distances Mon Apr 09 , 3:50pmEdward Boehnlein University of South Carolina Set Families with a Forbidden Induced Subposet Mon Apr 02 , 3:50pmJerrold R. Griggs University of South Carolina Searching for Diamonds Mon Mar 26 , 3:50pmLinyuan Lincoln Lu University of South Carolina Ricci-flat graphs Mon Mar 19 , 3:50pmHua Wang Georgia Southern University What else is new on subtrees of trees Fri Mar 16 , 3:30pmRyan Martin Iowa State University On diamond-free subposets of the Boolean lattice Mon Mar 12 , 3:50pmAustin Mohr University of Nebraska Wesleyan Quest for Negative Dependency Graphs Mon Feb 27 , 3:50pmAustin Mohr University of Nebraska Wesleyan Diamonds in the Rough (The Lovász Local Lemma)

## 2008

 Thu May 01Mark Walters University of South Carolina Iterated Point-Line Configurations Grow Doubly-Exponentially Thu Apr 24Paul Horn University of California at San Diego The spectral gap of a random subgraph of a graph Thu Apr 17Darren Narayan Rochester Institute of Technology Graph Representations and Extremal Sets Thu Apr 10Richard Anstee University of British Columbia, Canada Some progress towards a conjectured bound for forbidden configurations Thu Apr 03William Gasarch University of Maryland Grid Colorings Thu Mar 20Joshua Cooper University of South Carolina Symmetric and Asymptotically Symmetric Permutations, Part 2 Thu Mar 06Joshua Cooper University of South Carolina Symmetric and Asymptotically Symmetric Permutations Thu Feb 21Linyuan Lincoln Lu University of South Carolina An exact result and its application on hypergraph Turan numbers Tue Feb 19Vladimir Temlyakov University of South Carolina Some problems where approximation theory meets number theory Thu Feb 14Éva Czabarka University of South Carolina Diameter of 4-colorable graphs with given minimum degree Thu Feb 07Joshua Cooper University of South Carolina Klee's Measure Problem, Multiobjective Optimization, and Monotone Boolean Functions Thu Jan 24Richard Anstee University of British Columbia, Canada Some Non-simple Forbidden Configurations and Design Theory

## 2001

 Fri Nov 09 , 3:30pmClifford Smyth University of North Carolina, Greensboro Reimer's inequality and Rudich's conjecture