A very brief introduction to Fourier Analysis of Boolean Functions, given by Ryan O'Donnell (https://www.cs.cmu.edu/~odonnell) as an enrichment lesson in Harvard's CS 121 course.
Thanks to Madhu Sudan for inviting me to give this lecture.
For more, check out my website on the topic, http://analysisofbooleanfunctions.net
Thumbnail portrait by @tichaesque