## Department of Mathematics

### PAST COLLOQUIA

### 2015-2016 Academic Year

- "Invariant Measures for Amenable Locally Compact Groups and Hypergroups" Presented by Doctor Ben Willson from the Department of Mathematics at Western Illinois University.
**Date:**Thursday, December 10,**Time:**3:30 pm,**Place:**Morgan Hall Room 204 - "The Cartographer's Dilemma"-Student Colloquium presented by Doctor James Dibble from the Department of Mathematics at Western Illinois University.
**Date:**Friday, December 4,**Time:**3:30 pm,**Place:**Morgan Hall Room 204 - "Actions of Countable Groups, Generating Partitions and Entropy" presented by Professor Tserunyan from the Department of Mathematics at the University of Illinois.
**Date:**Thursday, November 12,**Time:**3:30 pm,**Place:**Morgan Hall Room 204 - "Logic and Homogeneity of the Pseudoarc" presented by Professor Solecki from the Department of Mathematics at University of Illinois.
**Date:**Thursday, November 5,**Time:**3:30 pm,**Place:**Morgan Hall Room 204 - "Mathematical Teleportation" presented by Professor Iraj Kalantari from the Department of Mathematics at Western Illinois University.
**Date:**Friday, October 30,**Time:**3:00 pm,**Place:**Morgan Hall room 208 - "
*l-*adic Perverse Sheaves...or Not" presented by Profesor Fedor Andreev from the Department of Mathematics at Western Willinois University.**Date:**Thursday, October 29,**Time:**3:30 pm,**Place:**Morgan Hall room 204 - "An Optimal Upper Bound on Regularity of Powers of Edge Ideals" presented by Doctor Ali Alilooee from the Department of Mathematics at Western Illinois University.
**Date:**Thursday, October 22,**Time:**3:30 pm,**Place:**Morgan Hall room 204

"Orbits of Maximal Vector Spaces" presented by Professor Rumen Dimitrov from the Department of Mathematics at Western Illinois University.**Date:**Thursday, October 15,**Time:**3:30 pm,**Place:**Morgan Hall room 204 - "The Relationship Between Synthetic Geometry and Convexity in Riemannian Manifolds" presented by Doctor James Dibble from the Department of Mathematics at Western Illinois University.
**Date:**Thursday, October 8,**Time:**3:30 pm,**Place:**Morgan Hall room 204 - "On the Sperner Lemmer" presented by Professor Nader Vakil from the Department of Mathematics at Western Illinois University.
**Date:**Thursday, October 1,**Time:**3:30 pm,**Place:**Morgan Hall room 204

### 2014-2015 Academic Year

- Thursday, July 23 at 12:15 in Morgan Hall room 214-Colloquium "Biologically Feasible Epidemic Models and Stability of Disease Free System for Disease Control" MS Thesis Defense by Hassan Rafique, student of Dr. Dinesh Ekanayake.
- Friday, July 17 at 2:45 in Morgan Hall room 204-Colloquium-"Asymptotic Stability and the Domain of Attraction for Nonlinear Control Systems" MS Thesis Defense by Nazar Emirov, student of Dr. Dinesh Ekanayke.
- Wednesday, July 1 at 2:45 in Morgan Hall room 204-Colloquium " An Introduction To Reverse Mathematics" MS Thesis Defense by Abolfazl Karimi, student of Dr. Iraj Kalantari.
- Friday, May 14 at 12:45 in Morgan Hall room 224 - Colloquium "Analysis of Student Achievement in Mathematics Using Data from Illinois and National Standardized Exams from 2000-2014" MS Thesis Defense by Amanda Meiners, student of Dr. Robert Mann.
- Friday, May 8 at 2:50 in Morgan Hall room 204 - Colloquium, "Foundations of Mathematics: by Abolfazl Karimi".
- Friday, April 24 at 3:00 in Morgan Hall room 222 - Colloquium, "Bizarre Values in Combinatorial Games" by Dr. Ted Rice of the WIU Department of Mathematics.
- Thursday, April 9 at 3:45 in Morgan Hall room 204 - Colloquium, "Regular cross sections of Borel flows" by Professor Kostyantin Slutskyy from the University of Illinois.
- Thursday, December 11 at 3:45 in Morgan Hall room 204 - Colloquium, "Tame Metric Geometry and T-convexity" by Erik Walsberg from the Department of Mathematics at UCLA.
- Thursday, December 4, 2014 at 3:45pm in Morgan Hall 204 - Colloquium, "Knots Connected by Wide Ribbons" by Dr. Susan Brooks of Western Illinois University.
- Friday, November 14, 2014 at 3:00pm in Morgan Hall 208 - Student Colloquium, "3 Mini-talks in applied math, statistics, and pure math" presented by Professors Amy Ekanayake, Beth Hansen, and Doug LaFountain of the WIU Department of Mathematics.
- Thursday, October 30 at 3:45pm in Morgan Hall 204 - Colloquium "Structured Inverse Eigenvalue Problems" by Dr. Keivan Hassani Monfared of Western Illinois University.
- Friday, October 17 at 3:00pm in Morgan Hall 208 - Student Colloquium: "How to build a vibrating system of masses and springs using linear algebra and calculus" by Dr. Keivan Hassani Monfared of Western Illinois University.
- Thursday, October 16 at 3:45pm in Morgan Hall 204 - Colloquium: "A seasonal SIR metapopulation model to control plague in prairie dog colonies" by Professor Amy Ekanayake of Western Illinois University.
- Thursday, September 25 at 3:45pm in Morgan Hall 204 - Colloquium: "A temperature-dependent hysteresis model and its application to inductive heating" by Professor Dinesh Ekanayake of Western Illinois University.
- Wednesday, September 17, 2014 at 3:45pm in Morgan Hall room 204 - Colloquium: "Chemical reaction network theory: dynamics from structure," by Dr. Casian Pantea from West Virginia University.

### 2013-2014 Academic Year

- Thursday, May 1 at 3:45pm in Morgan Hall room 204 - Colloquium "Isomorphisms and rigidity of co-maximal powers of
*Q*" by Professor Rumen Dimitrov of Western Illinois University - Wednesday, April 23 at 2:00pm in Stipes Hall room 121 - "Voting in Highly Anonymous Environments" by visiting lecturer, Professor Vincent Conitzer of Duke University.
- Thursday, April 24 at 3:45pm in Morgan Hall room 101A - "Mathematical Models: Uses, abuses, and non-uses" by visiting lecturer, Professor Andrew Odlyzko of the University of Minnesota.
- Thursday, April 17 at 4:00pm in Morgan Hall room 204 - Colloquium " Iterated Conditional Modes Algorithm for Medical Image Denoising " MS Thesis Defense by Christina B. Beisel, student of Dr. Dinesh Ekanayake.
- Thursday, April 10 at 3:45pm in Morgan Hall room 204 - Colloquium " Knot contact homology and group representations in knot theory " by Dr. Christopher Cornwell of Duke University.
- Thursday, April 3 at 3:45pm in Morgan Hall room 204 - Colloquium "Witt Vectors and Counting Wild Extensions of Fields" by Professor Seyfi Turkelli of Western Illinois University
- Thursday, March 27, 2014 at 3:45pm in Morgan Hall 204 - Colloquium "Roots of 2, and the continued fraction of the minimal asymptotic dispersion" by Professor Mojtaba Moniri of Western Illinois University
- Friday, March 28, 2014 at 3:00pm in Morgan Hall 208 - Student Colloquium "Visual analysis of polynomial macro-elements with
*Mathematica"*by Professor Victoria Baramidze of Western Illinois University - Thursday, March 20 at 3:45pm in 204 Morgan Hall - Colloquium "Introduction to the Mathematics of Computer Graphics" by Professor Nathan Carter of Bentley University.
- Wednesday, March 19 at 3:45pm in 204 Morgan Hall - Colloquium "The Allocation of a Prize" by Professor Pradeep Dubey of State University of New York at Stony Brook and Yale University.
- Thursday, February 27, 2014 at 3:45pm in Morgan Hall 204 - Colloquium "Measuring definable sets in o-minimal fields" by Professor Jana Marikova of Western Illinois University.
- Friday, February 21, 2014 at 3:00pm in Morgan Hall 208 -Student Colloquium "
**T**he Magic of Concurrency & Colinearity" by Professor Iraj Kalantari of Western Illinois University. - Thursday, February 20, 2014, at 3:45pm in Morgan Hall 204 - Colloquium "Dimension-optimal spaces of smooth cubic splines for a Hermite interpolation problem over polygonal holes" by Dr. Victoria Baramidze of Western Illinois University.

- Thursday, February 13, 2014, at 3:45pm in Morgan Hall 204 - Colloquium "Superconducting gap symmetry measurements in iron-based superconductors" by Professor Ryan Gordon of the Western Illinois University Physics Department.
- Thursday, January 30, 2014 at 3:45pm in Morgan Hall 204 - Colloquium "Aspects of Algebraic Topology: From Pure Mathematics, to Combinatory, and to Applied Mathematics" by Dr. Mokhtar Aouina of Western Illinois University
- Thursday, January 16, 2014 at 3:45pm in Morgan Hall 204 - Colloquium "Braid foliations and the generalized Jones conjecture" by Professor Doug LaFountain of Western Illinois University
- Thursday, December 5, 2013 at 2:45pm in Morgan Hall 224 - Colloquium " The Mathematics of Cryptography " by Professor Lavinia Ciungu of the University of Iowa and Cornell College.
- Thursday, November 21, 2013 at 3:45pm in Morgan Hall 204 - Colloquium "Power Study of Circular ANOVA Test against Nonparametric Alternatives" by Professor Feridun Tasdan of Western Illinois University.
- Friday, November 15, 2013 at 3:00pm in Morgan Hall 208 - Student Colloquium "
**A Frequentist’s Introduction to Bayesian Statistics" by Professor Elizabeth Hansen of Western Illinois University.** - Thursday, November 14, 2013 at 3:45pm in Morgan Hall 204 - Colloquium "How Hard is it to Compute the Floor Function?" by Professor Julia Knight of the University of Notre Dame.
- Thursday, November 7, 2013 at 3:45pm in Morgan Hall 204 - Colloquium "A Shift Parameter Estimation Based on Smoothed Kolmogorov-Smirnov" by Professor Feridun Tasdan of Western Illinois Unversity.
- Thursday, October 31, 2013 at 3:45pm in Morgan Hall 204 - Colloquium "Social Choice Violations in Rank Sum Scoring: A Formalization of Conditions and Corrective Probability Computations" presented by Justin Ehrlich, Assistant Professor of Computer Science at WIU and Shane Sanders, Assistant Professor of Economics at WIU.
- Wednesday, October 9, 3:00pm - Student Colloquium: Four Mini Talks in Math.

### 2012-2013 Academic Year

- Wednesday, July 24, 2013, 3:00-4:00pm - Colloquium "Methods of Optimal Ensemble Controls for Linear Systems" Master of Science Thesis Defense by Franck Njeunje, student of Dr. Dinesh Ekanayake.
- Thursday, May 2, 2013, 3:45-5:00pm - Colloquium "The Indeterminate Multipartition" presented by Professor William Keith from Western Illinois University.
- Thursday, May 2, 2013, 5:30pm - Math Department Picnic - Everly Park, Evergreen Pavilion
- Friday, April 26, 2013, 3:00-3:50pm - Student Colloquium "An Introduction to Coding Theory" presented by Professor Tom Blackford from Western Illinois University.
- Thursday, April 25, 2013, 3:45-5:00pm - Colloquium "Superposition of Periodic Patterns" presented by Professor Mojtaba Moniri from Western Illinois University.
- Thursday, April 18, 2013, 4:00-5:00pm - Colloquium "Modeling Temperature Dynamics of Inductively Heated Shape Memory Polymers Doped with Magnetic Nanoparticles" Master of Science Thesis Defense by Peter Kay III, student of Dr. Dinesh Ekanayake.
- Thursday, April 11, 2013, 3:45-5:00pm - Colloquium "An Overview of Fuzzy Logic From a Risk Management Perspective" presented by Professor Arnold F. Shapiro from Penn State University.
- Friday, April 5, 2013, 3:00-3:50pm - Student Colloquium "An Introduction to Geometric Group Theory" presented by Professor Doug LaFountain of Western Illinois University.
- Thursday, April 4, 2013, 3:45-5:00pm - Colloquium "Statistics of Ideal Class Groups" presented by Dr. Derek Garton, postdoctoral lecturer at Northwestern University
- Thursday, March 28, 2013, 3:45-5:00pm - Colloquium "Constacyclic Duadic Codes" presented by Professor Tom Blackford of Western Illinois University
- Thursday, March 21 2013, 3:45-5:00pm - Colloquium "Mathematical Issues of Meaning in School Mathematics" presented by Professor David Henderson from Cornell Unversity
- Thursday, March 7 2013, 3:45-5:00pm - Colloquium "Modular Forms, Elliptic Curves and Galois Representations" presented by Professor Mehmet Sengun from Unversity of Warwick
- Feb. 28, 2013, 3:45-5:00pm - Colloquium "Reverse VC calculations: using statistics in model theory" presented by Dr. David Lippell from Haverford College, Haverford, PA.
- February 21, 2013, 3:45-5:00 pm - Colloquium "Computable Reductions Between Mathematical Theorems" presented by Prof. Joseph Mileti from Grinnell College, Grinnell, IA, in 204 Morgan Hall
- October 4, 4:00-5:00 pm - Colloquium "Tame Geometry" presented by Dr. Philipp Hieronymi, a Visiting Professor from University of Illinois -Champaign/Urbana, in 204 Morgan Hall
- August 31, 4:00-5:00 pm - Colloquium "Characterization of compact and self-adjoint operators, and study of positive operators on a Banach space over a non-Archimedean field" presented by Prof. Khodr Shamseddine, from the University of Manitoba, in 204 Morgan Hall.

### 2011-2012 Academic Year

- June 14, 3:00-4:00 pm - Colloquium "An Economic Optimization Strategy for Residential Micro Combined Heat and Power Units" presented by Emrah Gunel, Graduate Student from Western Illinois University, in 204 Morgan Hall.
- April 30, 4:00-5:00 pm- Colloquium "In Vivo Imaging of Stem Cells" presented by Dr. Ali Lashgari, from the California Institute of Technology, in 204 Morgan Hall
- April 24, 4:00-5:00 pm - Colloquium "Model Theory and MInimality" presented by Dr. Joseph Flenner, a Visiting Assistant Professor from University of Notre Dame, in 204 Morgan Hall
- March 23, 4:00-5:00 pm - Colloquium "Preparing Math Teachers: What Have We Done Wrong?" presented by Dr. Hung Hsi-Wu, a Professor of Department of Mathematics from the University of California at Berkeley, in 204 Morgan Hall
- March 7, 4:00-5:00 pm - Colloquium "Widder's Theorem for Dirichlet Spaces" presented by Dr. Nathaniel Eldredge, a Visiting Assistant Professor from Cornell University, in 204 Morgan Hall
- March 6, 4:00-5:00 pm - Colloquium "Multiplicities, Integral Dependence and Equisingularity" presented by Dr. Javid Validashti, a Visiting Assistant Professor from the University of Illinois at Urbana-Champaign, in 204 Morgan Hall
- March 2, 4:00-5:00 pm - Colloquium "Invariants of Legendrian Graphs" presented by Dr. Elena Pavelescu, a Visiting Assistant Professor from Occidental College, in 204 Morgan Hall
- February 29, 4:00-5:00 pm - Colloquium "Jones' Conjecture and Matsuda Branched Surfaces" presented by Dr. Douglas LaFountain, a Visiting Postdoc and Lecturer from the University of California-Berkeley, in 204 Morgan Hall
- February 23, 4:00-5:00 pm - Colloquium "A Nearly Linear Phenomenon, and Exponentiation & Computability" presented by Dr. Mojtaba Moniri in 204 Morgan Hall.
- February 9, 4:00-5:00 pm - Colloquium "'Skyping' Problem Solving Tasks to Improve Fraction Instruction" presented by Professor Kim Hartweg, Department of Mathematics, Western Illinois University, in 204 Morgan Hall
- December 8, 4:00-5:00 pm - Colloquium "Connections and Problem Solving Tasks for the Common Core" presented by Professors Kim Hartweg & Bob Mann, Department of Mathematics, Western Illinois University, in 204 Morgan Hall
- December 1, 4:00-5:00 pm - Colloquium "Co-maximal powers and automorphisms of the lattice of (c.e.) subspaces of L*(V∞)" presented by Professor Rumen Dimitrov, Deparment of Mathematics, Western Illinois University, in 204 Morgan Hall
- November 17, 4:00-5:00 pm - Colloquium "Polynomials constant on a hyperplane and CR maps of spheres" presented by Dr. Jiri Lebl, Department of Mathematics, University of Wisconsin-Madison, in 204 Morgan Hall
- October 20, 4:00-5:00 pm - Colloquium "Discrete and penalized least squares splines on the unit sphere" presented by Professor Victoria Baramidze, Department of Mathematics, Western Illinois University, in 204 Morgan Hall
- October 13, 4:00-5:00 pm - Colloquium "Stochastic SIS Epidemic Models for Metapopulatios and their Comparison" presented by Professor Amy Ekanayake, Department of Mathematics, Western Illinois University, in 204 Morgan Hall
- September 9, 4:00-5:00 p.m.- Colloquium "Polish Groups, Ample Generics and Metric Model Theory" presented by Itai Ben Yaacov, Universite Claude Bernard - Lyon 1, Institut Camille Jordan, in 204 Morgan Hall

### 2010-2011 Academic Year

- April 22, 4:00-5:00 p.m. - Colloquium "Singluar Optimal Strategies for a Stochastic Cost Minimization Problem" presented by Professor Ananda Weerasinghe, Department of Mathematics, Iowa State University, in 204 Morgan Hall.
- April 1, 4:00-5:00 p.m. - Colloquium "A Residuated Structure for Intuitionistic Fuzzy Logic" presented by Professor Esfandiar Eslami, Department of Electrical Engineering, Northern Illinois University, in 204 Morgan Hall.
- March 24, 4:00-5:00 p.m. - Colloquium "Mind the Gaps: How College Readiness Narrows Achievement Gaps in College Success" presented by George Schlott, Senior Consultant at Educational Services-Illinois, in 204 Morgan Hall.
- December 2nd, 4:00-5:00 p.m. - Colloquium. "Modeling the Microstructure of the Temperature Field and the Effective Properties of Heat Conduction through Polydisperse Spherical Suspensions" presented by Dr. Abhinandan Chowdhury, Department of Mathematics, Western Illinois University, in 204 Morgan Hall.
- November 11th, 4:00-5:00 p.m. - Colloquium. "Control of Large-Scale Complex Systems" presented by Dr. Sr-Shin Li, Department of System Engineering, Division of Biology & Biomedical Sciences, Washington University, St. Louis, in 204 Morgan Hall.
- October 28th, 4:00-5:00 p.m. - Colloquium. "Cyclic Codes Over the 2-adic Numbers" presented by Dr. Tom Blackford, Department of Mathematics, Western Illinois University, in 204 Morgan Hall.
- September 14, 4:00-5:00 p.m. - "A Variational Approach to Image Fusion" presented by Dr. Todd Wittman, Department of Mathematics, University of California, Los Angeles, in 204 Morgan Hall.

### 2009-2010 Academic Year

- April 29, 3:30-4:30 - Colloquium "Introduction to Fuzzy Regression and Applications to Insurance" presented by Dr. Marie-Claire Koissi, of Western Illinois University, in 204 Morgan Hall.
- April 22, 4:00-5:00 - Colloquium "Asymptotic behavior of a low-dimensional model for magnetic and magnetostrictive transducers for periodic inputs" presented by Dr. Dinesh Ekayanake, of Western Illinois University, in 204 Morgan Hall.
- April 16, 4:00-5:00 - Colloquium "Geometric Constraints on Multivariate Splines " presented by Dr. Tatyana Sorokina, of Towson University, in 204 Morgan Hall.
- April 1, 4:00-5:00 - Colloquium "Symmetric matrix fields in the finite element Method" presented by Dr. Gerard Awanou, of Northern Illinois University, in 204 Morgan Hall.
- March 25, 2010, 4:00-5:00 p.m. - "The Logic of Intelligence Analysis" presented by Dr. Keith Devlin, Stanford University, in 204 Morgan Hall.
- December 2, 2009, 4:00-5:00 p.m. - "The Real Numbers and
*O*-minimality" presented by Lou van den Dries, Department of Mathematics, the University of Illinois at Urbana-Champaign, in 204 Morgan Hall. - November 19, 2009, 4:00-5:00 p.m. - "Polytopes, Algebra, Toric Varieties and Splines" presented by Dr. Henry Schenck, Department of Mathematics, the University of Illinois at Urbana-Champaign, in 204 Morgan Hall.
- November 12, 2009, 4:00-5:00 p.m. - "Non-accessible Critical Points of Some Rational Functions with Cremer Points" presented by Dr. Lia Petracovici, Department of Mathematics, Western Illinois University, in 204 Morgan Hall.
- November 5, 2009, 4:00-5:00 p.m. - "An Introduction to the
*p*-adic Integers" presented by Dr. Tom Blackford, Department of Mathemetics, Western Illinois University, in 204 Morgan Hall. - October 29, 2009, 4:00-5:00 p.m. - "An Unexpected Connection: Model Theory of Difference Fields and Algebraic Dynamics" presented by Dr. Alice Medvedev, Department of Mathematics, Statistics, and Computer Science, University of Illinois at Chicago, in 204 Morgan Hall.
- October 15, 2009, 4:00-5:00 p.m. - "Spherical Splines on Clough-Tocher Triangulations for Hermite Interpolation" presented by Dr. Victoria Baramidze, Department of Mathematics, Western Illinois University, in 204 Morgan Hall.

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