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Superiority of GNN over NN in generalizing bandlimited functions. (arXiv:2206.05904v2 [cs.LG] UPDATED)
Sept. 28, 2022, 1:13 a.m. | A. Martina Neuman, Rongrong Wang, Yuying Xie
stat.ML updates on arXiv.org arxiv.org
We constructively show, via rigorous mathematical arguments, that GNN
architectures outperform those of NN in approximating bandlimited functions on
compact $d$-dimensional Euclidean grids. We show that the former only need
$\mathcal{M}$ sampled functional values in order to achieve a uniform
approximation error of $O_{d}(2^{-\mathcal{M}^{1/d}})$ and that this error rate
is optimal, in the sense that, NNs might achieve worse.
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