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- Newsgroups: sci.math
- Path: sparky!uunet!mcsun!sunic!ugle.unit.no!nuug!nntp.uio.no!sol!rivero
- From: rivero@sol.cie.unizar.es (Alejandro Rivero)
- Subject: Points, topos and geometry
- Message-ID: <1993Jan5.185451.1749@ulrik.uio.no>
- Sender: news@ulrik.uio.no (Mr News)
- Nntp-Posting-Host: sol.cie.unizar.es
- Reply-To: rivero@sol.cie.unizar.es
- Organization: Department of Theoretical Physics. University of Zaragoza
- Date: Tue, 5 Jan 1993 18:54:51 GMT
- Lines: 25
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-
- I had one or two questions to add to Adler ones, perhaps
- some naughty cathegorist there can answer easily.
-
- First, is the category of conmutative C*-algebras a topos?
- Being as it is the dual (or it was the antiequivalente?) of the
- category of compact topological spaces, it would be a topos or sort of, am I
- correct?
-
- Second, what about the category of all C* algebras, this is, including the no
- conmmutative algebras? Following Connes, you can use ANY C* algebra to make
- diferential geometry. And you have "points" and "arcs" (R-->M or dually
- C(M)-->R). This would have a categorial counterpart.
-
- Third, which is the difference from the categorial point of view of the two
- categories? This would be: Which is the correct categorial formulation of
- conmuttativity? But I m not sure if there are more diffs.
-
- I dont know if categorists are or not in the side of Connes but I think they
- would have something to say about all this stuff of non conmutative geometry,
- manifolds etc...
-
- Alejandro Rivero
- rivero@cc.unizar.es
-