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- Newsgroups: sci.math
- Path: sparky!uunet!caen!sol.ctr.columbia.edu!shire.math.columbia.edu!dy
- From: dy@shire.math.columbia.edu (Deane Yang)
- Subject: Re: Freedman-Donaldson Theorem
- Organization: Mathematics Department, Columbia University
- References: <4173@seti.UUCP>
- Message-ID: <1992Sep10.161245.17305@ctr.columbia.edu>
- Sender: news@ctr.columbia.edu (The Daily Lose)
- Keywords: Exotic R^4, differential structures, topology
- Date: Thu, 10 Sep 1992 16:12:45 GMT
- X-Posted-From: shire.math.columbia.edu
- X-Posted-Through: sol.ctr.columbia.edu
- Lines: 36
-
- In article <4173@seti.UUCP> hussein@bora.inria.fr (Hussein Yahia) writes:
- > I'm interested in understanding the proof of the famous Freedman-Donaldson
- >theorem about "fake R^4", that is the existence of exotic diffentiable
- >structures on R^4. (For others R^n , n different of 4, all differentiable
- >structures are always diffeomorphic to the standard one). I tried to read
- >a book "Connections, Definite Forms, and Four-manifolds" by T. Petrie and
- >J. Randall (Oxford Science Publications) but it is quite a little bit
- >too difficult for me.
- >
- >Could someone give me a list of references leading to a proof of that theorem
- >for somebody like me who is just at the level of Volumes 1-2 of Spivak's
- >Course on Differential Geometry and Hirsh's Differential Topology (Springer
- >Verlag) ?
- >
-
- The proof divides into two very different parts,
- the topological theory developed by Freedman and the study of the
- moduli space of Yang-Mills fields developed by Donaldson. Neither
- part is particularly easy to understand, although, as a differential
- geometer, I find the latter far more understandable.
-
- My advice would be to focus on one or the other, depending on your
- taste. I believe that Freedman has written a few surveys on his
- work on 4-manifolds. The Donaldson theory is presented in the book
- cited above, a book by Freed-Uhlenbeck, and a set of lecture notes
- by Lawson. Any of these references should be used only as a starting
- point. You will need to consult other books and papers to fill in the
- details.
-
- Given your background, it might be better to pursue more fundamental
- material first. For the Freedman stuff, you should learn more topology
- (here, I can't help much). For the Donaldson stuff, you should learn
- more about analysis and elliptic PDE's.
-
- Deane Yang
- Polytechnic University
-