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Jenny Q. Du

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#machine learning Preprint Dec 2025

Fractal and Chaotic Activation Functions in Echo State Networks: Preprocessing Topology Governs the Echo State Property

This work systematically investigates non-smooth activation functions, including chaotic, stochastic, and fractal variants, in echo state networks, and reveals that preprocessing topology, rather than continuity, determines stability: monotone, compressive preprocessing maintains ESP across scales, while dispersive or...

Rae Chipera, Jenny Q. Du, Irene Tsapara · 0 citations