Tag Archives: Poincare duality

The Poincare conjecture

Posted on August 29, 2013 by John Roe

The next few sections of Chapter 1 are intended to introduce some key examples of constructions with manifolds: The high-dimensional Poincaré conjecture and the h-cobordism theorem Milnor’s exotic spheres Variation of Pontrjagin classes within a homotopy type In the version … Continue reading →

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What Surgery Is About: Manifolds

Posted on July 6, 2013 by John Roe

Now I’ll begin to post material from the book proper.  Here is the first section of Chapter I.  I’m going to try to post stuff in bite-size pieces like this, rather than a whole chapter at a time. Of course, … Continue reading →

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