Harry Richman
photo
I am interested in problems in
phylogenetics,
tropical geometry
(what's that?? ),
combinatorics,
and number theory.
I am currently a postdoc in the Matsen group ,
part of the
Herbold Computational Biology Program
at the Fred Hutch Cancer Center .
I was previously a postdoc at the University of Washington
where my mentor was Farbod Shokrieh .
Before that I was a graduate student at the University of Michigan
where my advisors were David Speyer
and Jeff Lagarias .
I was on the academic job market in fall 2019.
Before graduate school I studied math at MIT
and the Math in Moscow program.
Contact
email:
hrichman (at) alum (dot) mit (dot) edu
github:
harryrichman
Teaching
Research
My work can be found on
arXiv ,
Google Scholar ,
MathSciNet ,
ORCID ,
and zbMATH .
"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 .
"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 .
"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 .
"Derangements and the p-adic incomplete gamma function,"
coauthored with Andrew O'Desky .
Transactions of the American Mathematical Society 376 (2023), pp. 1065-1087.
arXiv:2012.04615 .
DOI: 10.1090/tran/8716 .
"Counting tripods on the torus,"
coauthored with Jayadev S. Athreya and David Aulicino .
Arnold Mathematical Journal 9 (2023), pp. 359-379.
arXiv:2111.01891 .
DOI: 10.1007/s40598-022-00216-z .
"The tropical Manin-Mumford conjecture,"
International Mathematics Research Notices 2023.21 (2023), pp. 18714-18751.
arXiv:2112.00168 .
DOI: 10.1093/imrn/rnad098 .
"The floor quotient partial order,"
coauthored with Jeffrey Lagarias .
Advances in Applied Mathematics 153 (2024).
arXiv:2212.11689 .
DOI: 10.1016/j.aam.2023.102615 .
Preprints
"The distribution of Weierstrass points on a tropical curve,"
submitted.
arXiv:1809.07920 .
"Tropical Weierstrass points and Weierstrass weights,"
coauthored with Omid Amini and Lucas Gierczak ,
submitted.
arXiv:2303.07729
"The family of $a$-floor quotient partial orders,"
coauthored with Jeffrey Lagarias ,
submitted.
"Lower rational approximations and Farey staircases."
arXiv:2303.02935 .
"Counting two-forests and random cut size via potential theory,"
coauthored with Farbod Shokrieh and Chenxi Wu .
arXiv:2308.03859
"Minors of tree distance matrices,"
coauthored with Farbod Shokrieh and Chenxi Wu ,
in preparation.
"Origami hexagon deformations and the flip graph,"
coauthored with Y. Liu,
in preparation.
"The Möbius function of the poset of triangular numbers under divisibility,"
coauthored with R. Pandey,
in preparation.
Ph.D. thesis
"Weierstrass points and torsion points on tropical curves."
published version: link
(local )
Notes and Presentations
"Matchings in convergent graph sequences," March 2017
notes
"Moduli space of tropical curves," June 2017
notes
"Local Gauss-Lucas theorem," July 2017
slides
"Dilated floor functions having nonnegative commutator," July 2017
poster
slides
AMS
"Descartes' rule and beyond," September 2017
slides
"Distribution of tropical Weierstrass points," September 2018
slides
poster
animation
"The poset of floor quotients,"
December 2019
slides
"Weierstrass points and torsion points on tropical curves,"
March 2020
slides
"Continuity over p-adic numbers,"
November 2021
slides
"Derangements and a p-adic incomplete gamma function,"
November 2021
slides
"Uniform bounds on tropical torsion points,"
January 2022
slides
poster
"Distance matrices and equilibirum measures on trees,"
December 2022
slides
"Tropical weights of Weierstrass points,"
April 2023
poster
"Phylogenetic trees to integer vectors,"
July 2023
slides
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
FindStat
database and search engine for combinatorial statistics and maps
Eugenia Cheng on the lecture system
Why should I do math?
Reasons by Tao Lin
(43., 35., 31., 10., 28., 8., 11., 14., 41., 26., 21., 18.)