Welcome
Welcome to my faculty website. I am a professor in the Department of Mathematical Sciences, specializing in representation theory of symmetric and algebraic groups as well as algebraic combinatorics.
Research
Recent Preprints
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Optimal Play, Nontransitivity, and Nash Equilibria in Dice Bingo
Hemmer, D. J., Ong, B. W. Preprint, 2026. arXiv:2606.20744
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Equal knapsack identities between symmetric group character degrees
Hemmer, D. J., Straub, A., Westrem, K. J. Submitted, 2025. arXiv:2510.00301
Recent Publications
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New identities in the character table of symmetric groups involving Riordan numbers
Hemmer, D. J., Straub, A., Westrem, K. J. The Electronic Journal of Combinatorics 33(1) (2026), P1.57.
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Partition-theoretic model of prime distribution
Botkin, A., Dawsey, M. L., Hemmer, D. J., Just, M. R., Schneider, R. Journal of Number Theory (2026), https://doi.org/10.1016/j.jnt.2025.12.008
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Partitions with Fixed Points in the Sequence of First-Column Hook Lengths
Cuthbertson, P., Hemmer, D. J., Hopkins, B., Keith, W. J. Annals of Combinatorics 30 (2026), 35–47.
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Generating functions for fixed points of the Mullineux map
Hemmer, D. J. European Journal of Combinatorics 127 (2025) 104141.
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Palindrome partitions and the Calkin–Wilf tree
Hemmer, D. J., Westrem, K. J. The Ramanujan Journal 65 (2024), 1073–1085.
Teaching
Fall 2026
- MA 3210: Introduction to Combinatorics
- MA 5980: Combinatorial Representation Theory
Spring 2027
- MA 4208: Optimization and Graph Algorithms