内容简介：
http://neuralnetworksanddeeplearning.com/
目录：
Neural Networks and Deep Learning
What this book is about
On the exercises and problems
Using neural nets to recognize handwritten digits
How the backpropagation algorithm works
Improving the way neural networks learn
A visual proof that neural nets can compute any function
Why are deep neural networks hard to train?
Deep learning
Appendix: Is there a simple algorithm for intelligence?
Acknowledgements
Frequently Asked Questions