# Claudia He Yun

# About Me

I am a postdoc at the Max Planck Institute for mathematics in Leipzig, working in the math software group lead by Michael Joswig. In August 2023, I will join the University of Michigan as a postdoc, working with David Speyer.

I received my Ph.D. from Brown University under the supervision of Melody Chan. My research interests include tropical geometry, combinatorial and computational algebraic geometry, and broadly combinatorics. I did my undergraduate studies at Smith College.

I use she/her/hers pronouns.

Here is my CV.

# Contact Me

Email: clyun at umich dot edu

Office: TBA

# Research

### Published papers/preprints and recorded talks

A Serre spectral sequence for the moduli space of tropical curves,

with Christin Bibby, Melody Chan, and Nir Gadish.

Preprint.Positive del Pezzo Geometry,

with Nick Early, Alheydis Geiger, Marta Panizzut and Bernd Sturmfels.

Preprint.Some thoughts and experiments on Bergman's compact amalgamation problem,

with Michael Joswig, Mario Kummer and Andreas Thom.

To appear in Beiträge zur Algebra und Geometrie.Discrete Morse theory for symmetric Delta-complexes.

Preprint.Equivariant Hodge polynomials of heavy/light moduli spaces,

with Siddarth Kannan and Stefano Serpente.

To appear in Forum of Mathematics, Sigma.Homology representations of compactified configurations on graphs applied to M_{2,n},

with Christin Bibby, Melody Chan, and Nir Gadish.

To appear in Experimental Mathematics

Please check out our Github page for the code and data.

Recording of talk at GOCCTopology of tropical moduli spaces of weighted stable curves in higher genus,

with Siddarth Kannan, Shiyue Li, and Stefano Serpente.

Adv. Geom. 23 (2023), no. 3, 305–314.The S_n equivariant homology of the tropical moduli spaces Delta_{2,n}.

Experimental Mathematics (2021): 1-13.

Supplementary Sage code.

Recording of talk at TGiZ.Puzzling and apuzzling graph,

with D. Gold, J. Henle, C. Huang, T. Lyve, T. Marin, J.Osorio, M. Puligandla, B. Weick, J. Xia, and J. Zhang. AKCE International Journal of Graphs and Combinatorics, vol. 13, no. 1 (2016): 1-10.

### Ongoing projects

Moduli spaces of tropical Z/pZ-covers, joint with Yassine El Maazouz, Paul Alexander Helminck, Felix Röhrle, and Pedro Souza

# Teaching

### Brown University

Teaching Assistant. Math 520, Linear Algebra, Spring 2022.

Teaching Assistant. Math 520, Linear Algebra, Spring 2021.

Teaching Assistant. Math 520, Linear Algebra, Fall 2020.

Instructor. Math 100, Introductory Calculus II, Fall 2019.

Teaching Assistant. Math 90, Introductory Calculus I, Spring 2019.

Teaching Assistant. Math 100, Introductory Calculus II, Fall 2018.

### Smith College

Tutor. All math courses below multivariable calculus and linear algebra, Fall 2016, Spring 2017.

Instructor. Introductory Java Programming, Winter 2016.

Tutor. CSC 212 Data Structures with Java, Fall 2016.

Tutor. PHY 215 Introductory Physics III; PHY 210 Math Methods for Physicists and Engineers, Spring 2015, Fall 2015, Spring 2016.

Grader. AST 111 Introductory Astronomy; PHY 117 Introductory Physics I; PHY 215 Introductory Physics III, Fall 2014, Spring 2015.

Learning Assistant. PHY 117 Introductory Physics I, Fall 2014.

### Others

GirlsGetMath @ ICERM . Teaching Assistant. Apportionment. Summer 2019.

Summer Science Program. Teaching Assistant and Residential Assistant. Multivariable calculus, Introductory Physics, Introductory Astronomomy, and Python Programming, Summer 2018.

# Expository Writings & Slides

# Outreach

I was on the organizing committee of the Brown Math Circle from 2018 to 2022. We organized weekly trips to a local middle school and a local high school to teach math through activities and games.

# Travels

### 2023

September 30 - October 2, AWM Research Symposium, Atlanta

July 10-14, SIAM Conference on Applied Algebraic Geometry, Eindhoven, The Netherlands

April 26-28, Graduate Student Meeting on Applied Algebra and Combinatorics, KTH Stockholm

Cover photo by Alicia Turbitt