We've reached the end of Chapter 2, and hence of Stillwell's first "pillar", so we've decided to host a catch-up session for those of you who want to continue but have missed a few sessions. If that's you, this is a really good time to jump back in as we'll be starting afresh with the second pillar -- co-ordinate geometry -- next time, and making a historical leap from ancient Athens to Renaissance France.
The only essential reading for this session is section 2.9 of Stillwell. There are no exercises to do, so for those of you who are up to date and want a little more we suggest Chapter 2 of Robin Hartshorne's Geometry: Euclid and Beyond, which goes into much more detail about Hilbert's axioms. In case you have trouble sourcing a copy, we found an electronic version online here. This is not essential reading for the session but will definitely help to inform our discussion of 2.9.
The picture for this event is from Didier's very neat proof of Rich's idea for a solution to an exercise in section 2.8 that we discussed last time.
This is a reading group for John Stillwell's Four Pillars of Geometry. The book can be purchased here (Amazon link). If you'd like to preview it first, we found an electronic copy hosted here (you need to register).