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Thursday, 8 September 2022

Some Math behind Neural Tangent Kernel

Lil'Log 3 years ago 41

Neural Tangent Kernel (NTK) is a mathematical framework that explains how neural networks evolve during gradient descent training and why wide networks consistently converge to global minima. The theory demonstrates that networks with infinite width exhibit deterministic convergence regardless of random initialization. This provides theoretical understanding of why overparameterized neural networks can achieve good generalization despite having more parameters than training data points.

Train your first Decision Transformer

Hugging Face 3 years ago 42

Hugging Face released a tutorial for training Decision Transformer models, a technique that uses transformers to solve reinforcement learning problems by generating action sequences instead of fitting value functions. The training takes approximately 40 minutes on Google Colab using the halfcheetah-expert offline RL dataset with 120 epochs and a batch size of 64. Users can now train offline RL agents from scratch using the custom data collator and trainer classes provided in the accompanying notebook.

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