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On the training dynamics of deep networks with $L_2$ regularization
Aitor Lewkowycz · Guy Gur-Ari
Thu Dec 10 06:15 AM -- 06:30 AM (PST) @ Orals & Spotlights: Deep Learning
We study the role of $L_2$ regularization in deep learning, and uncover simple relations between the performance of the model, the $L_2$ coefficient, the learning rate, and the number of training steps. These empirical relations hold when the network is overparameterized. They can be used to predict the optimal regularization parameter of a given model. In addition, based on these observations we propose a dynamical schedule for the regularization parameter that improves performance and speeds up training. We test these proposals in modern image classification settings. Finally, we show that these empirical relations can be understood theoretically in the context of infinitely wide networks. We derive the gradient flow dynamics of such networks, and compare the role of $L_2$ regularization in this context with that of linear models.
Author Information
Aitor Lewkowycz (Google)
Guy Gur-Ari (Google)
Related Events (a corresponding poster, oral, or spotlight)
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2020 Poster: On the training dynamics of deep networks with $L_2$ regularization »
Thu. Dec 10th 05:00 -- 07:00 PM Room Poster Session 5 #1647
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