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

I use she/her/hers pronouns.

Here is my CV.

Contact Me

Email: clyun at mis dot mpg dot de

Office: F3 07, MPI MiS, Inselstraße 22


Published papers/preprints and recorded talks

  1. Equivariant Hodge polynomials of heavy/light moduli spaces,
    with Siddarth Kannan and Stefano Serpente.

  2. Homology representations of compactified configurations on graphs applied to M_{2,n},
    with Christin Bibby, Melody Chan, and Nir Gadish.
    Please check out our Github page for the code and data.
    Recording of talk at GOCC

  3. Topology of tropical moduli spaces of weighted stable curves in higher genus,
    with Siddarth Kannan, Shiyue Li, and Stefano Serpente.
    To appear in Advances in Geometry

  4. 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.

  5. 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

  • Discrete Morse theory for symmetric Delta-complexes.
    We develop a discrete Morse theory for symmetric Delta-complexes and apply it to the inflation subcomplex of the regular matroid complex.


Brown University

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.


  • 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

  • Stagosaur group E2: Exponential growth of H^{4g-6}(M_g;Q).
    Part I by Brian Hwang. Part II by me. Part III by Shiyue Li.


  • 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.


Cover photo by Alicia Turbitt