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Approximation of Functionals by Neural Network without Curse of Dimensionality

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arxiv 2205.14421 v4 pith:HJWNQ3OF submitted 2022-05-28 math.NA cs.LGcs.NAmath.OC

Approximation of Functionals by Neural Network without Curse of Dimensionality

classification math.NA cs.LGcs.NAmath.OC
keywords approximationfunctionalsnetworkneuralcursedimensionaldimensionalityspaces
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abstract

In this paper, we establish a neural network to approximate functionals, which are maps from infinite dimensional spaces to finite dimensional spaces. The approximation error of the neural network is $O(1/\sqrt{m})$ where $m$ is the size of networks, which overcomes the curse of dimensionality. The key idea of the approximation is to define a Barron spectral space of functionals.

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