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Uniform $\mathcal{C}^k$ Approximation of $G$-Invariant and Antisymmetric Functions, Embedding Dimensions, and Polynomial Representations
March 5, 2024, 2:42 p.m. | Soumya Ganguly, Khoa Tran, Rahul Sarkar
cs.LG updates on arXiv.org arxiv.org
Abstract: For any subgroup $G$ of the symmetric group $\mathcal{S}_n$ on $n$ symbols, we present results for the uniform $\mathcal{C}^k$ approximation of $G$-invariant functions by $G$-invariant polynomials. For the case of totally symmetric functions ($G = \mathcal{S}_n$), we show that this gives rise to the sum-decomposition Deep Sets ansatz of Zaheer et al. (2018), where both the inner and outer functions can be chosen to be smooth, and moreover, the inner function can be chosen to …
abstract approximation arxiv case cs.lg dimensions embedding functions math.rt polynomial results show type uniform
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