- #1

tom.stoer

Science Advisor

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## Main Question or Discussion Point

I know that string theory tells us that 10 space-time dimensions have a rather special property, namely that a certain central charge vanishes. This allows for an anomaly-free quantization of s.t.

Two questions:

- are there other statements (not necessarily from s.t.) that something special happens in 4 dimensions?

- are there s.t. based arguments that exactly 6 of 10 dimensions are compactified?

Two questions:

- are there other statements (not necessarily from s.t.) that something special happens in 4 dimensions?

- are there s.t. based arguments that exactly 6 of 10 dimensions are compactified?