Mathematical Billiards (2024)

[vismit2000]

https://structures.uni-heidelberg.de/blog/posts/2024_01_costa/index.php

[seritools]

I assume posted because of the latest 2swap video about it: https://www.youtube.com/watch?v=kL9BTbIGxLg

[cadamsdotcom → seritools]

Holy crap that was dope. The music, the colors, the pacing.. just an absolute work of art by 2swap - and from the sounds of the end of the video, many many collaborators!

Thanks for sharing!

[srean]

They are a fun way to demonstrate LCM and GCD too

https://en.wikipedia.org/wiki/Arithmetic_billiards

With curved reflecting boundaries and parallel rays you get the beauty of catacaustics. A familiar site in a cup of coffee

https://en.wikipedia.org/wiki/Caustic_(mathematics)