Re: What about the other 16?

Posted by phobos on November 10, 19100 at 22:43:44:

In Reply to: What about the other 16? posted by jfuhr on November 10, 19100 at 19:10:01:

The information about compactifying the 22 extra
dimensions of bosonic string theory should be found
either somewhere on this site or in Greene's book. The
answer is really too long a story for the forum.

As for the "disappearance" of 16 extra dimensions,
there is a way (and not an easy one to explain) of
trading extra dimensions in a theory for extra fermions.
The rule is roughly that one can get rid of one extra
dimension for one complex fermion.

Note that I am NOT, REPEAT NOT saying that fermions
are the same as extra dimensions! There is a very
precise mathematical context in which one can
construct viable theories with the swapping above.
Unfortunately, this story is a tad technical.

phobos

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