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[Submitted on 1 Aug 2024] View a PDF of the paper titled Equivariant neural networks and piecewise linear representation theory, by Joel Gibson and 1 other authors View PDF Abstract:Equivariant neural networks are neural networks with symmetry. Motivated by the theory of group representations, we decompose the layers of an equivariant neural network into simple representations. The nonlinear activation functions lead to interesting nonlinear equivariant maps between simple representations. For example, the rectified linear unit (ReLU) gives rise to piecewise linear maps. We show that these considerations lead to a filtration of equivariant neural networks, generalizing Fourier series. This observation…