# William Erickson, Ph.D.

Postdoctoral Associate

## Education

Ph.D., University of Wisconsin-Milwaukee, 2022 (Advisor: Jeb Willenbring)

B.A., University of Notre Dame, 2010

## Biography

Dr. Erickson joined the Baylor faculty in 2022. He taught high-school and middle-school mathematics and Latin for eight years, before pursuing his doctorate at UW-Milwaukee (2016-2022). He spent 17 happy summers teaching swim lessons and serving as head lifeguard and then manager at his hometown pool in Waukesha, Wisconsin. He also enjoys trying out board games (occasionally designing new ones with his brothers), and playing piano for anyone who will listen.

## Academic Interests and Research

Dr. Erickson's research focuses on the representation theory of Lie groups, particularly from a combinatorial perspective, along with invariant theory and algebraic statistics.

## Publications

*The break buddy problem.*Math. Mag.**97**(2004), 194–199. https://doi.org/10.1080/0025570X.2024.2312800- (with Rebecca Bourn and Jeb F. Willenbring)
*Graphical methods and rings of invariants on the symmetric algebra.*Canad. J. Math. (2023), 1–26. http://dx.doi.org/10.4153/S0008414X23000780 - (with Jan Kretschmann)
*The sum of all width-one matrices.*European J. Combin.**115**(2024), 103799. https://doi.org/10.1016/j.ejc.2023.103799 *Comparing weighted difference and the earth mover’s distance via Young diagrams.*Discrete Math.**347**(2024), 113667. https://doi.org/10.1016/j.disc.2023.113667- (with Jan Kretschmann)
*The sum of width-one tensors.*Enumer. Comb. Appl.**4**(2023), #S2R7. https://doi.org/10.54550/ECA2024V4S1R7 - (with Daniel Herden, Jonathan Meddaugh, Mark Sepanski, et al.)
*Klein cordial trees and odd cyclic cordial friendship graphs.*Discrete Math.**346**(2023), 113488. https://doi.org/10.1016/j.disc.2023.113488 - (with Mark Colarusso and Jeb F. Willenbring)
*Contingency tables and the generalized Littlewood–Richardson coefficients.*Proc. Amer. Math. Soc.**150**(2022), 79–94. https://doi.org/10.1090/proc/15731 *Haste makes waste: an optimization problem.*College Math. J.**53**(2022), 122–133. https://doi.org/10.1080/07468342.2021.2022955*A generalization for the expected value of the earth mover’s distance.*Algebr. Stat.**12**(2021), 139–166. DOI: 10.2140/astat.2021.12.139

**Preprints**

*Expected value and a Cayley-Menger formula for the generalized earth mover’s distance.*arXiv:2406.07972- (with Markus Hunziker)
*A combinatorial interpretation of the Bernstein degree of modules of covariants.*arXiv:2405.18766 - (with Markus Hunziker)
*Tensor invariants for classical groups revisited.*arXiv:2401.17496 - (with Markus Hunziker)
*Stanley decompositions of modules of covariants.*arXiv:2312.16749 - (with Jan Kretschmann)
*The structure and normalized volume of Monge polytopes.*arXiv:2311.07522 - (with Rebecca Bourn)
*Palindromicity of the numerator of a statistical generating function.*arXiv:2307.02652 - (with Daniel Herden, Jonathan Meddaugh, Mark Sepanski, et al.)
*Young tableau reconstruction via minors.*arXiv:2307.13161 - (with Markus Hunziker)
*Dimension identities, almost self-conjugate partitions, and BGG complexes for Hermitian symmetric pairs.*arXiv:2301.09744 *Enright resolutions and Blattner’s formula in Type A.*arXiv:2108.08469