KAN: Kolmogorov-Arnold Networks
Authors: Ziming Liu, Yixuan Wang, Sachin Vaidya, Fabian Ruehle, James Halverson, Marin Soljačić, Thomas Y. Hou, Max Tegmark
AI-generated Key Points
- Kolmogorov-Arnold Networks (KANs) are innovative alternatives to traditional Multi-Layer Perceptrons (MLPs)
- KANs feature learnable activation functions on edges for enhanced accuracy and interpretability
- In mathematics, KANs have demonstrated the ability to rediscover known relations in an unsupervised mode
- KANs show promise in physics applications such as Anderson localization
- KANs aid in identifying models with mobility edges and contribute to resolving debates on localization in interacting systems
- A new paradigm of "AI for Math" is proposed using KANs' unsupervised learning mode to discover additional relations beyond knot invariants
- Through experimentation, it is evident that KANs offer a valuable tool for exploring complex mathematical relationships and advancing research in both mathematics and physics.
Abstract: Inspired by the Kolmogorov-Arnold representation theorem, we propose Kolmogorov-Arnold Networks (KANs) as promising alternatives to Multi-Layer Perceptrons (MLPs). While MLPs have fixed activation functions on nodes ("neurons"), KANs have learnable activation functions on edges ("weights"). KANs have no linear weights at all -- every weight parameter is replaced by a univariate function parametrized as a spline. We show that this seemingly simple change makes KANs outperform MLPs in terms of accuracy and interpretability. For accuracy, much smaller KANs can achieve comparable or better accuracy than much larger MLPs in data fitting and PDE solving. Theoretically and empirically, KANs possess faster neural scaling laws than MLPs. For interpretability, KANs can be intuitively visualized and can easily interact with human users. Through two examples in mathematics and physics, KANs are shown to be useful collaborators helping scientists (re)discover mathematical and physical laws. In summary, KANs are promising alternatives for MLPs, opening opportunities for further improving today's deep learning models which rely heavily on MLPs.
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