4min chapter

Lex Fridman Podcast cover image

#74 – Michael I. Jordan: Machine Learning, Recommender Systems, and the Future of AI

Lex Fridman Podcast

CHAPTER

The Most Beautiful, Mysterious, Profound Idea in Optimization?

Nesterov acceleration is just that we are going to use gradients to move around into space. So for a smooth convex function, there's an answer which is 1 over the number of steps squared. And so I think it's a surprise to most the NESTRAF discovered a new algorithm that has got two pieces to it. It uses two gradients and puts those together in a certain kind of obscure way. The thing doesn't even move downhill all the time. It sometimes goes back uphill. That is the right intuition. But that intuition is not enough to understand how to do it and why it works. There are a lot of cool ideas in optimization but just using grad

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