Re:A Beginner's Guide to the Mathematics of Neural Networks ...
by najarvg on Monday February 20, 2017 @12:21PM
(#13689014)
+1 for Karpathy's guide. It's a mini-book - hands-on, extensive and guided by his personal philosophy of knowing all the nitty gritty math details so you know how to optimize your scripts even if you use many of the available libraries
http://karpathy.github.io/neuralnets/