ISAIAH SIEGL

Email: isiegl AT uw DOT edu

Office: PDL-C 08-D

I am a fourth-year mathematics graduate student at the University of Washington. My advisor is Sara Billey. Before UW, I did my undergrad at Drexel University in Philadelphia, Pennsylvania. Go Birds. My mathematical interests are in algebraic combinatorics, graph theory, and symmetric functions. Outside of math, I enjoy skateboarding, watching movies, and exploring cities. Currently Reading: The Power Broker by Robert Caro.

Research:

My primary research interest is the Stanley-Stembridge conjecture as well as other questions about chromatic symmetric functions.

Papers and Preprints:

• Towards Upper and Lower Bounds for Chromatic Symmetric Functions in the Elementary Basis Preprint, September 2025. arXiv.
• Noncommutative Schur functions for Posets (With Jonah Blasiak, Holden Eriksson, and Pavlo Pylyavskyy) January 2025. Selecta Mathematica arXiv.
• Cylindric P-Tableaux for (3+1)-Free Posets September 2025. Combinatorial Theory arXiv.

Teaching:

Current:

TA		MATH125 Calculus II		Winter 2026
Office Hours:		Tuesday: 11:30-12:30, Wednesday 12:30-1:30

Past:

Instructor	MATH208 Matrix Algebra	Summer 2024
Instructor	MATH407 Linear Optimization	Summer 2025
TA	MATH407 Linear Optimization	Winter 25, Spring 25
TA	MATH124 Calculus I	Fall 22, Winter 22, Winter 23, Winter 24, Spring 24, Fall 24
TA	MATH126 Calculus III	Spring 23, Summer 23
TA	MATH464 Numerical Analysis I	Fall 23

I offer tutoring at the undergraduate level. Contact me by email for more information.