**Spring 2023**

April 26, 2023, Selected Problems in Geometry (Dimitar Grantcharov)

April 12, 2023, Factoring (Dimitar Grantcharov)

March 22, 2023, Geometric Inequalities! (Ana Boiangiu, International Computer High School of Bucharest)

March 8, 2023, Symmetries in Geometry (Dimitar Grantcharov)

February 22, 2023, Curves, functions and equations (Natasha Rozhkovskaya, Kansas State University)

January 25, February 8, 2023, Number Theory and Digits (Dimitar Grantcharov)

**Fall 2022**

November 30, 2022, AMC Geometry Problems and Similarity (Dimitar Grantcharov)

October 5, November 16, 2022, Counting (Dimitar Grantcharov)

September 7, 21, 2022, Tiling and Coloring (Dimitar Grantcharov)

**Spring 2022**

May 11, 2022, Some Selected Problems (Luke Robitaille)

April 13, May 6, 2022, Games (Dimitar Grantcharov)

March 23, 2022, BAMO 2022 Aftermath: Exploring the Epsilon-Neighborhood (Zvezdelina Stankova, UC Berkeley)

March 2, 2022, Polynomials (Luke Robitaille)

February 16, 2022, Puzzles and More (Dimitar Grantcharov)

February 2, 2022, Graph Theory (Luke Robitaille)

**Fall 2021**

December 15, 2021, Inequalities (Luke Robitaille)

December 1, 2021, Pigeonhole Principle (Jon Erickson)

November 3&17, 2021, Problems Involving Digits (Dimitar Grantcharov, Luke Robitaille)

November 1, 2021, Problems Involving Digits (Luke Robitaille)

October 6 & 20, 2021, Selected AMC-AIME Geometry Problems (Dimitar Grantcharov)

September 8 & 22, 2021, Some Combinatorics Problems (Luke Robitaille)

**Spring 2021**

April 14 & 28, 2021, Number Theory, Number Theory II (Dimitar Grantcharov)

March 31, 2021, Induction (Jon Erickson)

February 24 & March 3, 17, 2021, Complex Numbers, Complex Numbers II, Complex Numbers III (Luke Robitaille)

January 20 & February 3, 2021, Grids (Luke Robitaille)

**Fall 2020**

December 2 & 9, 2020, Polynomials (Dimitar Grantcharov)

November 4 & 18, 2020, Some Number Theory Problems (Luke Robitaille)

October 7 & 21, 2020, Lengths in Geometry (Luke Robitaille)

September 9 & 23, 2020, Coloring (Dimitar Grantcharov)

**Spring 2020**

May 14, 2020, Invariants (Jon Erickson)

April 23, 2020, Billiards (Styopa Zharkov)

April 16, 2020, Functional Equations (Luke Robitaille)

April 2, 2020, Areas and Geometry (Luke Robitaille)

**Fall 2017**

September 21, 2017, Putnam Exam Preparation: Inequalities (Dimitar Grantcharov)

October 5, 2017, Some Combinatorial Problems (Luke Robitaille)

**Selected Old Lectures**

January 23, 2014 Spider and fly (Cornelius Pillen, University of South Alabama)

December 3, 2013 Cryptology (Michaela Vancliff, University of Texas at Arlington)

September 26, 2012 Complex numbers and polynomials (Dimitar Grantcharov)

September 12, 2012 Fibonacci numbers (Dimitar Grantcharov)

September 5, 2012 Sequences (Dimitar Grantcharov)

March 6, 2012 Problems from Moscow Mathematical Olympiad (Alicia Prieto Langarica)

February 21, 2012 MSU Problem Corner problems (Kris Garrett)

February 7, 2012 Invariants (Dimitar Grantcharov)

January 31, 2012 AMC10 preparation session II (Dimitar Grantcharov)

January 24, 2012 AMC10 preparation session I (Dimitar Grantcharov)

September 28, 2011 Polynomials (Dimitar Grantcharov)

September 21, 2011 Number Theory II (Dimitar Grantcharov)

September 14, 2011 Number Theory I (Dimitar Grantcharov)

October 27, 2010 Symmetries on the Plane (Gaik Ambartsoumian)

October 20, 2010 Pigeonhole Principle (Dimitar Grantcharov)

October 13, 2010 Inversion (Dimitar Grantcharov)

October 6, 2010 Divisibility and Remainders (Dimitar Grantcharov)

February 6, 2010: UTA Math Competition (Dimitar Grantcharov)

October 15, 2009: Algebra Problems II

September 17th, 2009: Algebra Problems (Dimitar Grantcharov)

May 5, 2009: Problem Solving Session II (Dimitar Grantcharov)

April 28, 2009: Problem Solving Session I (Dimitar Grantcharov)

April 21, 2009: Inversion and Plane Geometry (Dimitar Grantcharov)

March 10, 2009: Combinatorics II (Dimitar Grantcharov)

March 3, 2009: Combinatorics I (Dimitar Grantcharov)

February 24, 2009: Games II (Dimitar Grantcharov)

February 17, 2009: Games I (Dimitar Grantcharov)