University of Reddit Courses:

We offer free, open-access courses in mathematics through University of Reddit (now defunct), including video instruction, problem sets and solutions, and an online forum. 

Spring 2012: Introduction to Group Theory

Summer 2012: Introduction to Group Representations

arXiv (research articles):

Research articles at arXiv

Recent Research Talks:

At the end of everyspring semester, the CUNY Graduate Center hosts CANT, a weeklong conference on Combinatorial and Additive Number Theory.

March 14, 2017: Young Tableau Seminar Notes

Pdf slides from CANT 2017 (May 23, 2017 - CUNY Graduate Center)

May 23, 2017: "Clebsch-Gordan coefficients in characteristic zero"

Pdf (Physics background for Clebsch-Gordan coefficients)

Pdf slides from CANT 2018 (May 25, 2018 - CUNY Graduate Center)

May 25, 2018: "Central Zeros of Clebsch-Gordan coefficients"

Pdf slides from Study Group on Number Theory (March 29, 2019 - CUNY Graduate Center)

March 29, 2019: "Binomial arrays and generalized Vandermonde identities"

Pdf slides from CANT 2019 (May 22, 2019 - CUNY Graduate Center)

May 22, 2019: "The gentle art of 3x3 semi-magic squares"

Pdf slides from Emmy Noether Seminar (June 14, 2019 - FAU-Erlangen-Nuremberg)

June 14, 2019: "The generatingfunctionology of Clebsch-Gordan coefficients"

Pdf slides from CUNY Study Group in Number Theory (March 13, 2020 - CUNY Graduate Center)

March 13, 2020: "Algebraic aspects of magic matrices and semi-magic squares"

Pdf slides from Emmy Noether Seminar (July 24, 2020 - FAU-Erlangen-Nuremberg)

July 24, 2020: "An intertwining operator for dihedral groups"

Pdf slides from CANT 2021 (March 25, 2021 - CUNY Graduate Center)

March 24, 2021: "Vandermonde convolution for ranked posets"

Pdf slides from RAMMP talk (July 1, 2021 - CUNY Graduate Center)

July 1, 2021: "Counting problems for lattices"

Pdf slides from Representation Theory Seminar (November 12, 2021 - CUNY Graduate Center)

November 12, 2021: "Lattice path enumeration for semi-magic squares of size three"