Weilin Li

collaborators

2 papers

math.OC2026

Multidimensional Gradient-MUSIC: A Global Nonconvex Optimization Framework for Optimal Resolution

Albert Fannjiang, Weilin Li

We develop a multidimensional version of Gradient-MUSIC for estimating the frequencies of a nonharmonic signal from noisy samples. The guiding principle is that frequency recovery…

math.NA2025

Nonharmonic multivariate Fourier transforms and matrices: condition numbers and hyperplane geometry

Weilin Li

Consider an operator that takes the Fourier transform of a discrete measure supported in $X \subset [- \frac{1}{2}, \frac{1}{2})^{d}$ and restricts it to a compact $Î©\subset\mathbb{…