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Originally posted by Entreri
Surfer dude stuns physicists with theory of everything
I found this link when digg'ing - thought it was interesting enough to post
[edit on 15-11-2007 by Entreri]
[edit on 15-11-2007 by Entreri]
...the calculation describing this structure, known as E8, would cover an area the size of Manhattan.
E8 (pronounced "E eight") is an example of a Lie (pronounced "Lee") group. Lie groups were invented by the 19th-century Norwegian mathematician Sophus Lie to study symmetry. Underlying any symmetrical object, such as a sphere, is a Lie group. Balls, cylinders or cones are familiar examples of symmetric three-dimensional objects.
Mathematicians study symmetries in higher dimensions. E8 has 248 dimensions.
The magnitude and nature of the E8 calculation invite comparison with the Human Genome Project. The human genome, which contains all the genetic information of a cell, is less than a gigabyte in size. The result of the E8 calculation, which contains all the information about E8 and its representations, is 60 gigabytes. This is enough to store 45 days of continuous music in MP3-format.
The cost was having to run the calculation four times, plus the time to combine the answers. In the end the calculation took about 77 hours on the supercomputer
The goal is to describe all the possible representations of E8. These representations are extremely complicated, but mathematicians describe them in terms of basic building blocks. The new result is a complete list of these building blocks for the representations of E8, and a precise description of the relations between them, all encoded in a matrix with 205,263,363,600 entries.
Originally posted by Vanitas
The problem is - or so I am told - that it seems to be totally useless in terms of prediction: not a good sign for any theory...
Source | telegraph.co.uk | Surfer dude stuns physicists with theory of everything
Despite this unusual career path, his proposal is remarkable because, by the arcane standards of particle physics, it does not require highly complex mathematics.
Even better, it does not require more than one dimension of time and three of space, when some rival theories need ten or even more spatial dimensions and other bizarre concepts. And it may even be possible to test his theory, which predicts a host of new particles, perhaps even using the new Large Hadron Collider atom smasher that will go into action near Geneva next year.
Originally posted by jpm1602
I believe it was from the 'onion' notorious for spoofing stuff. Wouldn't sell the board just yet.
Originally from the pdf document posted at An Exceptionally Simple Theory of Everything
If E8 theory is fully successful as a theory of everything, our universe is an exceptionally beautiful shape.
There are also aspects of this theory that are poorly understood. The relationship between fermion generations and triality is suggested by the structure of E8 but is not perfectly clear... This relationship may also shed light on how and why nature has chosen a non-compact form, E IX, of E8. Currently, the symmetry breaking and action for the theory are chosen by hand to match the standard model | this needs a mathematical justification.
The theory proposed in this paper represents a comprehensive unification program, describing all fields of the standard model and gravity as parts of a uniquely beautiful mathematical structure. The principal bundle connection and its curvature describe how the E8 manifold twists and turns over spacetime, reproducing all known fields and dynamics through pure geometry. Some aspects of this theory are not yet completely understood, and until they are it should be treated with appropriate skepticism. However, the current match to the standard model and gravity is very good. Future work will either strengthen the correlation to known physics and produce successful predictions for the LHC, or the theory will encounter a fatal contradiction with nature. The lack of extraneous structures and free parameters ensures testable predictions, so it will either succeed or fail spectacularly. If E8 theory is fully successful as a theory of everything, our universe is an exceptionally beautiful shape.
Given today's status, Garrett's model does not naturally lead to a unification of the Standard Model interactions with gravity (he has to choose the action by hand that contains both; in his paper only one of possible ways of doing it is described, this being explained by Lisi himself), (a) it does not allow us to understand quantum gravity (since there's nothing said about quantization); (b) it does not explain the parameters in the SM (since there isn't yet a mechanism for symmetry breaking); (c) it does not explain the cosmological constant or its value (as said above, to claim there has to be one, it would be necessary to show there's no way to do it without one); (d) it does not explain the hierarchy problem (and I see no way to do so); (e)it does not explain why we live in a spacetime with 3 spatial and 1 timelike dimensions.