"Kaluza-Klein theories in twelve dimensions" ... and F-theory This is a separate thread to discuss another idea by arivero, originally https://www.physicsforums.com/showthread.php?t=485247&page=4#63". Some references: http://www.sciencedirect.com/science/article/pii/0550321385902329" [Broken]) http://iopscience.iop.org/0034-4885/50/9/001". D Bailin and A Love, 1987. Rep. Prog. Phys. 50 1087. The second article is a review of Kaluza-Klein theories and is noteworthy for going over the crucial arguments, due to Witten, about the difficulties of obtaining chiral fermions in KK theories, even if one adds torsion. Some of those arguments are from Witten's paper "Fermion Quantum Numbers in Kaluza-Klein Theory", which is apparently only available in the proceedings of the "Shelter Island II" conference from 1983. It's curious that the first paper, on KK theories in 12 dimensions, is apparently completely uncited in the literature on F-theory, which suggests either that there's an obvious reason why one can't interpret F-theory in this way, or that the old KK lore really was forgotten.