<iframe width="580" height="385" src="https://www.youtube.com/embed/aircAruvnKk?modestbranding=1" frameborder="0" allowfullscreen></iframe> <br>What are the neurons, why are there layers, and what is the math underlying it? Help fund future projects: ... <br><a href="https://www.youtube.com/watch?v=aircAruvnKk">source</a>