I’ve prepared an introductory video on the remarkable Burnside’s lemma.
I hope you’ll enjoy it. It’s very useful both for students (I can’t count how many times it saved me in tests and math competitions) and for teachers (it makes it possible to create engaging and interesting problems).
https://youtu.be/fu3wZYhuTuY
I publish about one video a month, precisely so I can select topics that aren’t already overdone, exploring subjects that are important to me but have remained in a niche corner of the web.
https://preview.redd.it/ohju2w7br1ig1.png?width=1280&format=png&auto=webp&s=0986fab95e9e2ecfe6575a4bad9719220338c030