Re: How do you build an equation of motion for strings?

Posted by alexh110 on November 22, 2003 at 22:50:51:

In Reply to: Re: How do you build an equation of motion for strings? posted by DickT on November 12, 2003 at 15:45:35:

I'm not sure I understand this model:

Surely a Lorentz manifold would not work; you would need to use a Riemann manifold. This is because the extreme distortion of space-time at the quantum scale, would make your spatial coordinate fold into the time coordinate in a messy way.

Also my maths isn't quite up to it, but it looks to me like the conformal group is a weaker invariance than that used in GR (presumably it is a subgroup of the GR invariance group)? So if that's the case, then this would imply that conformal field theories break down in some regions of space-time?

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