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3Blue1Brown Series (2016)

Season 3 • Episode 3 • What is backpropagation really doing?

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3Blue1Brown Series Season 3, Episode 3: What is backpropagation really doing?

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What's actually happening to a neural network as it learns? Watch 3Blue1Brown Series Season 3, Episode 3 What is backpropagation really doing? in HD free online. Enjoy high-quality streaming of 3Blue1Brown Series Season 3, Episode 3 and share your thoughts in the comments below!

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Episodes

4 episodes
But what is a Neural Network?
1

But what is a Neural Network?

Introduction to neural networks.
Gradient descent, how neural networks learn
2

Gradient descent, how neural networks learn

The goal of this video is to introduce the idea of gradient descent and to analyze a specific network.
What is backpropagation really doing?
3

What is backpropagation really doing?

What's actually happening to a neural network as it learns?
Backpropagation calculus
4

Backpropagation calculus

This one is a bit more symbol heavy, and that's actually the point. The goal here is to represent in somewhat more formal terms the intuition for how backpropagation works in part 3 of the series, hopefully providing some connection between that video and other texts/code that you come across later.