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Michio Kaku: Global Symmetry on Yang-Mills theory and gravity theory uniqueness (?)
In p.6 of Michio Kaku book Introduction to Superstrings and M-Theory-Springer (1998), he said
Yang-Mills theory and gravity theory are the unique solution to two simple geometric statements:
Global ...
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Gauge transformation and Kaluza-Klein metric
The Kaluza-Klein metric, by reduction, can be written as a $(4+m) \times (4+m)$ symmetric matrix, where $m$ is the dimension of the additional spacetime (if we decompose $M_D = M_4 \times M_m$). It ...
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