Research

I wrote my doctoral dissertation under Manjul Bhargava at Princeton University on a way of generalizing certain aspects of Galois theory to non-separable ring extensions, and then spent three years as a postdoc at the Leiden University in the Netherlands. My current research focuses on discriminant algebras (ways of converting arbitrary rank-n algebras into rank-2 algebras) and electrical networks (i.e. edge-weighted graphs) and their application to algebraic geometry.

Here’s a timeline of the highlights of my mathematical activity since my PhD:
(For papers, only the most recent activity is shown, which tends to make the past year look disproportionately busy.)

  • Mar. 2017: Seminar “Paths that never cross” for Carleton College.
  • Jan. 2017: “Galois closure data for extensions of rings” (arxiv) accepted for publication in Transformation Groups.
  • Dec. 2016: Seminar “A new discriminant algebra construction” for the University of Minnesota’s algebraic geometry seminar.
  • Dec. 2016: “Fine compactified moduli of enriched structures on stable curves” (arxiv) with David Holmes, updated and submitted for publication.
  • Dec. 2016: “Isomorphisms of Discriminant Algebras” (arxiv) with Alberto Gioia, posted to the arxiv.
  • Dec. 2016: Seminar “The tropical Grassmannian” for the University of Minnesota’s algebraic geometry reading group.
  • Nov. 2016: Seminar “The boundary complex of \bar{\mathcal{M}}_{g,n}” (ditto).
  • Oct. 2016: Seminar “Introduction to Tropicalization” (ditto).
  • Oct. 2016: “Néron Models and the Height Jump Divisor” (arxiv) with David Holmes and Robin de Jong, accepted for publication in Transactions of the American Mathematical Society.
  • Sep. 2016: “A new discriminant algebra construction” (pdf) with Alberto Gioia, published in Documenta Mathematica.
  • June 2016: “Non-existence of a functorial resolvent cubic algebra” (pdf), a letter to Manjul Bhargava.
  • Mar. 2016: Seminar “What’s inside the black box?” for Carleton College.
  • Jan. 2016: Attended the AMS joint mathematics meetings in Seattle.
  • Jul. 2015: Attended the AMS summer research institute on algebraic geometry in Salt Lake City.
  • Apr. 2015: “Uniqueness of discriminant algebras in ranks ≤ 3” (pdf), a letter to Alberto Gioia.
  • Aug. 2014: Article “The Gibbs Phenomenon: Why JPEGs Look Yucky” (pdf) for Leiden University’s Eureka! Magazine.
  • May 2014: Seminar “Solvability by Radicals and Solvable Galois Groups” (pdf) for the University of Vienna’s algebraic geometry seminar.
  • Mar. 2014: Seminar “A New Definition of Discriminant Algebra” (pdf) for Leiden University’s algebra, geometry, and number theory seminar.
  • June 2013: “Galois Closures for Rings” (pdf), PhD Thesis with Manjul Bhargava

Earlier work on resistor networks with L. Peter Mannisto:

  • “On local recoverability of circular planar electrical networks” (pdf)
  • “The connection-determinant formula, with applications to electrical networks” (pdf)
  • “The tree diagrams formula” (pdf)
  • “Open subgraphs of a graph with boundary” (pdf)