You are reading a single comment by @GF and its replies.
Click here to read the full conversation.
London Fixed Gear and Single-Speed is a community of predominantly fixed gear and single-speed cyclists in and around London, UK.
This site is supported almost exclusively by donations. Please consider donating a small amount regularly.
@GF
The set of all sets that are not members of themselves.
(And that triangle one made my head hurt until I realised the hypotenuses weren't straight.)