EN FR

Chenyang Zhao

I am a final-year MSci student in Mathematics at Imperial College London, working in algebraic geometry, especially deformation theory, Hilbert schemes, moduli problems, and computational methods.


Publications

Smoothability of the one-step loci with Hilbert functions (1,5,6) and (1,5,7)

Smoothability of the one-step loci with Hilbert functions (1,5,6) and (1,5,7)

Chenyang Zhao
arXiv, 2026

We prove that the one-step loci with Hilbert functions (1,5,6) and (1,5,7) are smoothable in embedding dimension five. The proof uses the Erman-Velasco smoothable regularity-two family and a finite-field differential rank test, placing these exceptional Shafarevich gap cases on the smoothable side.

Deformation Theory and Torus-Fixed Geometry of the Nested Hilbert Scheme of Points

Deformation Theory and Torus-Fixed Geometry of the Nested Hilbert Scheme of Points

Chenyang Zhao
arXiv, 2026

We study the nested Hilbert scheme of points on the affine plane via deformation theory, torus actions, and Young diagram combinatorics. We identify tangent spaces at nested pairs, describe torus-fixed points by partitions with a removable corner, derive the tangent-weight formula using a Young-diagram shortening rule, and verify the formula computationally in Macaulay2.

The GameTheory package for Macaulay2

The GameTheory package for Macaulay2

Erin Connelly, Vincenzo Galgano, Zhuang He, Giacomo Maletto, Elke Neuhaus, Irem Portakal, Hannah Tillmann-Morris, Chenyang Zhao
arXiv, 2025

We describe the GameTheory package version 1.0 for computing equilibria in game theory available since version 1.25.05 of Macaulay2. We briefly explain the four equilibrium notions, Nash, correlated, dependency, and conditional independence, and demonstrate their implementation in the package with examples.

Interactive Playground

Young diagrams and nested fixed points

A small software companion for the thesis: removable corners, addable monomial generator directions, and the row-and-column shortening rule for tangent weights.

Open Playground

Macaulay2 Lab

Try small algebraic geometry computations

A tiny lab with Macaulay2 starter snippets for Groebner bases, monomial ideals, Young diagram boundaries, and Betti tables.

Open Lab