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String Theory and Λ Drawback: string theory only makes sense in a set number of space-time dimensions (10 for string theory, 11 for M-theory) We observe only 4 dimensions. The others must be wrapped up somehow (in circles, spheres, donut shapes, …
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Nuclear Physics B256 (1985) 253-284 HETEROTIC STRING ...
theory.uchicago.eduThus the heterotic string is constructed as a combina- * The observation that rank 16 is equal to the difference of the 26 dimensions of the bosonic string theory and …
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