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Likelihood Ratio Tests by Kernel Gaussian Embedding

arXiv:2508.07982v2 Announce Type: replace-cross Abstract: We propose a novel kernel-based nonparametric two-sample test, employing the combined use of kernel mean and kernel covariance embedding. Our test builds on recent results showing how such combined embeddings map distinct probability measures to…

Learning Neural Networks by Neuron Pursuit

arXiv:2509.12154v1 Announce Type: cross Abstract: The first part of this paper studies the evolution of gradient flow for homogeneous neural networks near a class of saddle points exhibiting a sparsity structure. The choice of these saddle points is motivated from…

Kernel-based Stochastic Approximation Framework for Nonlinear Operator Learning

arXiv:2509.11070v1 Announce Type: new Abstract: We develop a stochastic approximation framework for learning nonlinear operators between infinite-dimensional spaces utilizing general Mercer operator-valued kernels. Our framework encompasses two key classes: (i) compact kernels, which admit discrete spectral decompositions, and (ii) diagonal…

Contractive kinetic Langevin samplers beyond global Lipschitz continuity

arXiv:2509.12031v1 Announce Type: cross Abstract: In this paper, we examine the problem of sampling from log-concave distributions with (possibly) superlinear gradient growth under kinetic (underdamped) Langevin algorithms. Using a carefully tailored taming scheme, we propose two novel discretizations of the…