<a href="https://www.youtube.com/watch?v=xvmXRGruKLs">Video</a> of the lecture.<br>
<a href="https://www.youtube.com/watch?v=2d_dtTZQyUM">Waiting room video</a>: Scene from "A Beautiful Mind" where John Nash (Russell Crowe) tries to explain the notion of a Nash equilibrium".<br><br>

Introduced the fundamental group of a space, and explained that the fundamental group of the circle S<sup1</sup> is infinite cyclic.