Harry Richman


I am a postdoc at the University of Washington. I am interested in problems in combinatorics, tropical geometry, and number theory. My mentor at UW is Farbod Shokrieh. I was on the job market in fall 2019.

I was recently a graduate student at the University of Michigan where my advisor was David Speyer. Before graduate school I studied math at MIT and the Math in Moscow program.

Contact

email: hrichman (at) uw (dot) edu
office: Padelford C-421
address: Box 354350
Seattle, WA 98195

Teaching

Winter 2022: Math 208

Autumn 2021: WXML Counting spanning trees
Summer 2021: MREG Rational Catalan combinatorics
Spring 2021: Math 308
Autumn 2020: Math 308 (linear algebra)
Winter 2019: Math 116, Origami on Lattices
Winter 2018: Math 116
Fall 2016: Math 215 (multivariable calculus)
Winter 2016: Math 116
Fall 2015: Math 216 (differential equations)
Winter 2015: Math 116 (calculus II)
Fall 2014: Math 115 (calculus I)

Research

  1. "Dilated floor functions that commute," coauthored with J. C. Lagarias and T. Murayama. American Math. Monthly 123.10 (2016), pp. 1033-1038.
    arXiv:1611.05513. DOI: 10.4169/amer.math.monthly.123.10.1033

  2. "Dilated floor functions having nonnegative commutator I. Positive and mixed sign dilations," coauthored with Jeffrey Lagarias. Acta Arithmetica 187.3 (2019), pp. 271-299.
    arXiv:1806.00579. DOI: 10.4064/aa180602-21-9

  3. "Dilated floor functions having nonnegative commutator II. Negative dilations," coauthored with Jeffrey Lagarias. Acta Arithmetica 196.2 (2020), pp. 163-186.
    arXiv:1907.09641. DOI: 10.4064/aa190628-14-1

  4. "The distribution of Weierstrass points on a tropical curve," submitted.
    arXiv:1809.07920.

  5. "Derangements and the p-adic incomplete gamma function," coauthored with Andrew O'Desky. preprint.
    arXiv:2012.04615.

  6. "The tropical Manin-Mumford conjecture," submitted.
    arXiv:2112.00168.

  7. "Origami hexagon deformations and the flip graph," coauthored with Y. Liu, in preparation.

Notes and Presentations

Links


Analysis quals
Rubik's cube
Quotes about math
Origami simulator built by Amanda Ghassaei
Multiline formulas guidelines provided by Acta Arithmetica
Math Subject Classification browse and search, resource from zbMATH
OEIS Online Encyclopedia of Integer Sequences
Why should I do math? Reasons by Tao Lin (43., 35., 31., 10., 28., 8., 11., 14., 41., 26., 21., 18.)