title: Updating weights in backpropagation algorithm
body: <p>I think I've understood each step of backpropagation algorithm but the most important one. How do weights get updated? Like at the end of this tutorial? <a href="http://home.agh.edu.pl/~vlsi/AI/backp_t_en/backprop.html" rel="noreferrer">http://home.agh.edu.pl/~vlsi/AI/backp_t_en/backprop.html</a>  </p>