You should also watch the related video about how he stores Klein bottles under his house. It's fascinating. https://www.youtube.com/watch?v=-k3mVnRlQLU https:

You should also watch the related video about how he stores Klein bottles under his house. It's fascinating. https://www.youtube.com/watch?v=-k3mVnRlQLU https://www.youtube.com/watch?v=-k3mVnRlQLU