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Re: Strings a minumum topology

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Posted by DickT on September 14, 2003 at 17:49:06:

In Reply to: Re: Strings a minumum topology posted by Mike2 on September 14, 2003 at 17:23:26:

Mike,

I hope it wasn't I who gave you the idea that a physical entity had to be a submanifold. Many of the structures now considered are not manifolds, such as orbifolds. An orbifold starts out as a manifold (with boundary) but then you glue points in it to other points in it. The result may wind up superficially look like a manifold but it isn't because of the inner structure of the identification.

Regards,
Dick

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