I have this really weird hankering to do some linear algebra all of a sudden, but I dont have anything to do. Havent had to do any too recently so thought I'd ease back in with some sort of a simple problem... maybe ill try deriving the matrix for a single layer perceptron...
@freemo This toy programming challenge never got any nibbles, but I did use linear algebra when I did it - maybe it would scratch that hankering for you?