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About this site

Posted on December 12, 2017 by John Roe

  In 1996 I was the Ulam Visiting Professor at the University of Colorado, Boulder. While I was there I gave a series of graduate lectures on high-dimensional manifold theory, which I whimsically titled Surgery for Amateurs. The title was … Continue reading →

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The Poincare sphere

Posted on September 3, 2013 by John Roe

Following on from my previous post, I would like to add a little introduction to the Poincare homology sphere early on in Chapter 1.  This gives an opportunity to introduce the \(E_8\) plumbing in a reasonably down-to-earth context, so it … Continue reading →

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