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Universal Functional Regression with Neural Operator Flows
April 5, 2024, 4:41 a.m. | Yaozhong Shi, Angela F. Gao, Zachary E. Ross, Kamyar Azizzadenesheli
cs.LG updates on arXiv.org arxiv.org
Abstract: Regression on function spaces is typically limited to models with Gaussian process priors. We introduce the notion of universal functional regression, in which we aim to learn a prior distribution over non-Gaussian function spaces that remains mathematically tractable for functional regression. To do this, we develop Neural Operator Flows (OpFlow), an infinite-dimensional extension of normalizing flows. OpFlow is an invertible operator that maps the (potentially unknown) data function space into a Gaussian process, allowing for …
abstract aim arxiv cs.lg distribution function functional learn notion prior process regression spaces stat.ml tractable type universal
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