Catch-Up and Euclidean Conclusions

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).

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  • camelia

    Dear geometry enthusiast, I thoroughly enjoy the magic of geometry you share at these sessions. ;) I look forward to watching a few of the videos that help us construct. Proof is not so much a passion of mine. ;) But the beauty of its process is apparent in the lovely geometry dance steps you shared Tuesday night. with gratitude, www.seamandala.com ;)

    April 11, 2013

  • Alice

    A good opportunity to take stock. Atmosphere is supportive as ever. An interesting mix of levels of ability offers the opportunity to learn from other people.

    April 10, 2013

  • Matthew

    Must get to these one day but next week I'll be Up North.

    April 6, 2013

  • Emir K.

    I still need to get the book though

    April 5, 2013

  • camelia

    I hugely love the topics you are discussing. I only came to the first session so I am probably really behind but would love to catch up as much as I can.

    April 3, 2013

    • andrew m.

      sections 2.2- 2.4 are probably the most important.

      April 5, 2013

  • Hild L.

    Unfortunately this day coincides with something else. Would have loved to have continued, but am so behind prob a bit tricky to catch up

    April 3, 2013

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