https://arxiv.org/abs/1404.7828 https://arxiv.org/abs/1404.7828 (Disclaimer: I don't know that much about ML/Deep Learning, the above was recommended by deeple

https://arxiv.org/abs/1404.7828 https://arxiv.org/abs/1404.7828 (Disclaimer: I don't know that much about ML/Deep Learning, the above was recommended by deeplearning.net and is what I'm slogging through ATM. I do have some background in "classical" statistics & optimization theory, and the above article is not that math-heavy)