Andrew Sack

I'm a Parekh Research Postdoctoral Assistant Professor at the University of Michigan. My preferred pronouns are he/him. As a PhD student, my advisor was Pavel Galashin. and I am currently mentored by Sergey Fomin.

You can find my CV here.

Contact Information:

Email:
Office:	EH 3827

Research

My research focuses primarily on the intersection of lattice theory and polyhedral combinatorics. My dissertation focused on the combinatorics of poset associahedra.

Papers

1. Operahedron Lattices (with C. Defant) | arXiv:2402.12717
2. Poset Associahedra and Stack-sorting (with S. Ngyuen) | arXiv:2310.02512
3. The poset associahedron f-vector is a comparability invariant (with S. Ngyuen) | arXiv:2310.00157
4. A realization of poset associahedra | arXiv:2301.11449
5. On audio enhancement via online non-negative matrix factorization. (with W. Jiang, M. Perlmutter, P. Salanevich, and D. Needell) CISS 2022 | arXiv:2110.03114

Teaching (click for links):

Fall 2021

115A Linear Algebra

131A Analysis

Winter 2021

Math 115AH Linear Algebra

Fall 2020

Math 115A Linear Algebra

Fall 2019

Math 61 Discrete Structures

Hobbies

I run a youtube channel about math! Check it out!

I have also made some videos on TikTok about math. Check them out here.