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Neural Hilbert Ladders: Multi-Layer Neural Networks in Function Space
April 12, 2024, 4:43 a.m. | Zhengdao Chen
cs.LG updates on arXiv.org arxiv.org
Abstract: To characterize the function space explored by neural networks (NNs) is an important aspect of learning theory. In this work, noticing that a multi-layer NN generates implicitly a hierarchy of reproducing kernel Hilbert spaces (RKHSs) - named a neural Hilbert ladder (NHL) - we define the function space as an infinite union of RKHSs, which generalizes the existing Barron space theory of two-layer NNs. We then establish several theoretical properties of the new space. First, …
abstract arxiv cs.lg function kernel layer math.fa math.oc math.pr networks neural networks nns space spaces stat.ml theory type work
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