Papers · 4
Research
Every paper is on Zenodo with a DOI, free to read under CC BY 4.0. Each paper’s page lists what the paper shows and what it does not claim. Further down the page are posters for projects that are not finished yet.
Every line that crosses the square hits this fence. Its length is √2 + √6/2, the shortest known.
Sharp reach bounds and quantitative localization for opaque sets
We prove two sharp inequalities for barriers that block every line through the unit square, and show what any barrier shorter than √2 + √6/2 must look like.Clique minors and fractional clique covers in graphs with independence number two
For graphs with independence number two, we turn clique-minor bounds into chromatic bounds without accumulating error, and apply them to Hadwiger’s conjecture.Stationary response and singular limits in a linear zonal gyrokinetic model
We derive the stationary response of a linear periodic gyrokinetic model without assuming uniform kinetic relaxation, and show that two of its limits do not commute.Locality and global information in elliptic solvers
A local approximation to an elliptic inverse needs on the order of nᵈ/(w + 1)ᵈ shared coordinates of global information, and a linear construction achieves this.
Work in progress
We are still working on these projects. Each poster describes the problem and the results we have so far.

Sidon subsets through random rounding

Inertia of matching cofactor matrices

Critical points of the permanent with fixed row and column sums

Growth of pattern-avoiding ascent sequences

Stability of the Gaussian log-Sobolev inequality

Slow particles and weak collisions in gyrokinetics

Relative covariance in discrete Gibbs models

What a weighted subset of the data can fit

What calibration tells mixed-precision quantization

Certified compression of endgame tables

Repetition under a deadline

Dissociated sets of irreducible polynomials

Periods and rounding in integer optimization

Pairs of eigenvalues at the edge of a spectrum

Cell-state bounds when treatment kills cells

Predicting clone composition from relatives

Ranking LIR-like candidates in a viral protein