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Quadratic models for understanding catapult dynamics of neural networks

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arxiv 2205.11787 v3 pith:LRMUNZCN submitted 2022-05-24 cs.LG math.OCstat.ML

classification cs.LGmath.OCstat.ML
keywords modelsneuralnetworksquadraticcatapultanalysislinearphase
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While neural networks can be approximated by linear models as their width increases, certain properties of wide neural networks cannot be captured by linear models. In this work we show that recently proposed Neural Quadratic Models can exhibit the "catapult phase" [Lewkowycz et al. 2020] that arises when training such models with large learning rates. We then empirically show that the behaviour of neural quadratic models parallels that of neural networks in generalization, especially in the catapult phase regime. Our analysis further demonstrates that quadratic models can be an effective tool for analysis of neural networks.

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Cited by 2 Pith papers

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