I think the best introductory resources are Nielsen's book [http://neuralnetworksanddeeplearning.com/ http://neuralnetworksanddeeplearning.com/] and Hinton's on

I think the best introductory resources are Nielsen's book [http://neuralnetworksanddeeplearning.com/ http://neuralnetworksanddeeplearning.com/] and Hinton's online course [https://www.coursera.org/course/neuralnets https://www.coursera.org/course/neuralnets]. If you need something specifically for Theano, they have their own tutorial [http://deeplearning.net/tutorial/ http://deeplearning.net/tutorial/].