Upcoming Activities:

• ILAS 2025
  Kaohsiung, Taiwan. 23-27 June, 2025.


• FPSAC 2025
  Sapporo, Japan. 21-25 July, 2025.


• NCTS Tropical Geometry in Taiwan
  Taipei, Taiwan. 11-13 August , 2025.

Selected Presentations:

Filtrations of Tope Spaces of Oriented Matroids
• IBS Workshop on (Mostly) Matroids (Slides)
  August 2024
• MIT-Harvard Combinatorics Seminar (Richard P. Stanley Seminar in Combinatorics)
  September 2023
• Georgia Tech Algebra Seminar
  September 2023
• Ruhr-Universität Bochum Combinatorics Seminar
  January 2023
• QMUL Workshop on Matroids and Tropical Combinatorics
  January 2023
• KTH Combinatorics Seminar
  November 2022

The Critical Groups of Adinkras and Similar Objects
• TMS Annual Meeting (Slides)
  January 2025
• Brandeis Combinatorics Seminar
  November 2021

Oriented Matroids from Triangulations of Products of Simplices
• BIRS Workshop on Algebraic Aspects of Matroid Theory
  March 2023
• CAS Workshop on Real Structures in Geometry
  August 2021
• AMS Fall Central Sectional Meeting, Special Session on Algebraic, Geometric & Topological Combinatorics (Slides)
  September 2020
• InterCity (Neuchatel-Fribourg-Bern) Seminar
  February 2020

The Dimension of an Amoeba
• Scandinavian Gathering Around Remarkable Discrete Mathematics (Slides)
  May 2019
• Georgia Tech Algebra Seminar
  January 2019

Geometric Bijections of Graphs and Regular Matroids
• International Conference on Formal Power Series and Algebraic Combinatorics (Poster)
  July 2019
• CIRM Workshop on Combinatorial Geometries
  September 2018
• Institut Mittag-Leffler Seminar (Slides)
  February 2018
• MIT Combinatorics Seminar
  October 2017
• Atlanta Lecture Series in Combinatorics and Graph Theory
  September 2017
• Brown University Discrete Math Seminar
  May 2017
• AMS Spring Southeastern Sectional Meeting, Special Session on Interactions Between Algebraic and Tropical Geometry
  March 2016
• BIRS-CMO Workshop on Sandpile Groups
  November 2015
• Cornell Combinatorics and Discrete Geomtry Seminar
  April 2015

Selected Past Conferences/Research Visits:

• Geometry of Matroids
  Institute for Advanced Study, USA. 21-25 October, 2024.


• Workshop on (Mostly) Matroids
  Institute for Basic Science, South Korea. 19-23 August, 2024.


• Algebraic Aspects of Matroid Theory
  Banff International Research Station, Canada. 12-17 March, 2023.


• Real Aspects of Geometry
  Centre International de Rencontres Mathematiques, France. 31 October-4 November, 2022.


• Combinatorial Geometries: Matroids, Oriented Matroids and Applications
  Centre International de Rencontres Mathematiques, France. 24-28 September, 2018.


• Tropical Geometry, Amoebas, and Polytopes
  Institut Mittag-Leffler, Sweden. 15 January-10 February, 2018.


• Sandpile Groups
  Casa Matematica Oaxaca, Mexico. 15-20 November, 2015.

Organized Events:

• First meeting of KTH-UiO MaP-Trop (Matroids, Polytopes, and Tropical Geometry seminar)
  University of Oslo. 26 January, 2024.
  Co-organized with Eline Mannino, Kris Shaw, and Benjamin Schroeter.


• Chip-firing and Tropical Curves (Day 1, Day 2)
  University of Bern. 12-13 July, 2019.
  A minisymposium co-organized with Alejandro Vargas at the SIAM Conference on Applied Algebraic Geometry 2019.