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MTd2

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Marcus pointed out this yesterday:

http://arxiv.org/abs/1506.08073

A. Garrett Lisi

(Submitted on 24 Jun 2015)

Our universe is a deforming Lie group.

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This is a non pretentious title, so his solution probably passed unnoticed. Also, he hints on exotic smoothness in 4d, though he hasn't said that directly, but cited Scorpan's book, the Wild World of 4 Manifold.

So, in a way, there is some relationship with Torsten's work.

"One philosophical justification could be that the geometry and topology of four-dimensional manifolds is maximally rich [24], and that the representations of the E8 Lie group are the most numerous, but this is not completely satisfying. Also, there is no good reason, other than the spin-statistics requirement, why the bosonic and fermionic parts of the superconnection must be valued in complementary parts of the Lie algebra. It is possible that this restriction could be relaxed, allowing the existence of BRST ghosts or other particles, or that there may be a natural reason for the restriction that is not yet clear. A better understanding is needed."

The 3 generations appear on p. 32, section 16.

http://arxiv.org/abs/1506.08073

**Lie Group Cosmology**A. Garrett Lisi

(Submitted on 24 Jun 2015)

Our universe is a deforming Lie group.

*****************************************

This is a non pretentious title, so his solution probably passed unnoticed. Also, he hints on exotic smoothness in 4d, though he hasn't said that directly, but cited Scorpan's book, the Wild World of 4 Manifold.

So, in a way, there is some relationship with Torsten's work.

"One philosophical justification could be that the geometry and topology of four-dimensional manifolds is maximally rich [24], and that the representations of the E8 Lie group are the most numerous, but this is not completely satisfying. Also, there is no good reason, other than the spin-statistics requirement, why the bosonic and fermionic parts of the superconnection must be valued in complementary parts of the Lie algebra. It is possible that this restriction could be relaxed, allowing the existence of BRST ghosts or other particles, or that there may be a natural reason for the restriction that is not yet clear. A better understanding is needed."

The 3 generations appear on p. 32, section 16.

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