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• W4308731656 abstract "As an emerging paradigm in scientific machine learning, neural operators aim to learn operators, via neural networks, that map between infinite-dimensional function spaces. Several neural operators have been recently developed. However, all the existing neural operators are only designed to learn operators defined on a single Banach space; i.e., the input of the operator is a single function. Here, for the first time, we study the operator regression via neural networks for multiple-input operators defined on the product of Banach spaces. We first prove a universal approximation theorem of continuous multiple-input operators. We also provide a detailed theoretical analysis including the approximation error, which provides guidance for the design of the network architecture. Based on our theory and a low-rank approximation, we propose a novel neural operator, MIONet, to learn multiple-input operators. MIONet consists of several branch nets for encoding the input functions and a trunk net for encoding the domain of the output function. We demonstrate that MIONet can learn solution operators involving systems governed by ordinary and partial differential equations. In our computational examples, we also show that we can endow MIONet with prior knowledge of the underlying system, such as linearity and periodicity, to further improve accuracy." @default.
• W4308731656 created "2022-11-15" @default.
• W4308731656 creator A5008536963 @default.
• W4308731656 creator A5009632487 @default.
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• W4308731656 date "2022-11-07" @default.
• W4308731656 modified "2023-10-09" @default.
• W4308731656 title "MIONet: Learning Multiple-Input Operators via Tensor Product" @default.
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• W4308731656 doi "https://doi.org/10.1137/22m1477751" @default.
• W4308731656 hasPublicationYear "2022" @default.
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