Exotic differential structures on S^7 produce different Dirac operator spectra for specific symmetric gauge potentials in the Kaluza-Klein limit, implying different physical laws on topologically identical manifolds.
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Physics on manifolds with exotic differential structures
Exotic differential structures on S^7 produce different Dirac operator spectra for specific symmetric gauge potentials in the Kaluza-Klein limit, implying different physical laws on topologically identical manifolds.