If you have 24 minutes, George Wilson's talk about propagators is really interesting and demonstrates how we can find solutions to problems by looking at math.

If you have 24 minutes, George Wilson's talk about propagators is really interesting and demonstrates how we can find solutions to problems by looking at math. https://www.youtube.com/watch?v=nY1BCv3xn24 https://www.youtube.com/watch?v=nY1BCv3xn24