3 papers
math.PR2025
A semicircle law for the normalized Laplacian of sparse random graphs
Yiming Chen, Zijun Chen, Yizhe Zhu
We study the limiting spectral distribution of the normalized Laplacian of an ErdÅs-Rényi graph . To account for the presence of isolated vertices in the spa…
hep-th2025
Fortuity with a single matrix
Yiming Chen
We construct and study a supersymmetric quantum mechanical model with a single adjoint fermionic matrix. The model is exactly solvable yet contains a large number of fortuit…
math.CO2025
Zero-one Grothendieck Polynomials
Yiming Chen, Neil J. Y. Fan, Zelin Ye
Fink, Mészáros and St.Dizier showed that the Schubert polynomial is zero-one if and only if avoids twelve permutation patterns. In this paper, we prove th…