activity
20242026
collaborators

20 papers

math.PR2026

Sharp Frobenius-Norm Concentration for Sample Moment Tensors

Jiaheng Chen, Daniel Sanz-Alonso

This paper establishes sharp dimension-free Frobenius-norm concentration inequalities for sample moment tensors. Our bounds are optimal over the sub-Gaussian class, while for Gauss…

stat.ML2026

From Spectral Methods to Sample Complexity Bounds for Fourier Neural Operators

Nisha Chandramoorthy, Daniel Sanz-Alonso, Nathan Waniorek

We establish approximation and learning guarantees for Fourier neural operators (FNOs) applied to time- solution operators of dissipative evolution equations. The analysis build…

math.ST2026

Optimal Multiscale Learning of Linear Operators

Jiaheng Chen, Daniel Sanz-Alonso

We study the statistical and computational limits of learning bounded linear operators between Sobolev spaces from noisy input-output data. In wavelet coordinates, the problem is r…

math.DS2026

Continuous Data Assimilation with Learned Surrogate Dynamics

Wenwen Li, Daniel Sanz-Alonso

Continuous data assimilation seeks to estimate the state of a dynamical system from partial observations. In many applications, however, the state dynamics are unknown or prohibiti…

eess.SP2026

Functional Multi-Target Detection via Bispectrum Inversion

Anna Little, Daniel Sanz-Alonso, Mikhail Sweeney +1

This paper develops a functional theory for multi-target detection, where a compactly supported signal is recovered from a single noisy observation containing many unknown translat…

cs.IT2026

Functional Multi-Reference Alignment via Deconvolution

Omar Al-Ghattas, Anna Little, Daniel Sanz-Alonso +1

This paper studies the multi-reference alignment (MRA) problem of estimating a signal function from shifted, noisy observations. Our functional formulation reveals a new connection…