From: Michael S. Lorrey (retroman@together.net)
Date: Tue Feb 16 1999 - 07:37:36 MST
Anders Sandberg wrote:
> So the double pairs in some sense correspond to the usual distance
> measures, while the other pairs are more of "mixtures" that occur when
> the coordinate system is not perfectly aligned with the curvature of
> space (locally, you can always set up coordinates to make the tensor
> diagonal, but it doesn't work in general globally).
Ah, ok. Thanks.
>
>
> Now, g is symmetric (that is part of the definition, actually),
> g_ij=g_ji, and in 4-dimensional space that means you can only have 10
> independent components.
>
> However, I'm not entirely certain the 10 components of g explain why
> there are 10 (11) dimensions in string theory, the last paper I read
> about it ("M-theory for laymen" or something similar, available from
> xxx.lanl.gov) just made me more confused.
Yeah, its intimidating as to the confidence they have in the 'layman' to understand what they
are talking about. Then again, it is a government page....mix physicistese with bureaucratese
and its a wonder its readable at all. ;)
This archive was generated by hypermail 2.1.5 : Fri Nov 01 2002 - 15:03:04 MST