On 8/22/2012 4:36 AM, Stephen P. King wrote:

Hi Jason,## Advertising

Nothing "in the theory" suggests that landscapes are a problem! But that is kinda mypoint, we have to use meta-theories of one sort or another to evaluate theories. Occam'sRazor is a nice example... My point is that explanations should be hard to vary and getthe result that one needs to "match the data" or else it is not an explanation at all.One can get anything they want with a theory that has landscapes. Look!http://en.wikipedia.org/wiki/String_theory_landscape"The string theory landscape or anthropic landscape refers to the large number ofpossible false vacua in string theory. The "landscape" includes so many possibleconfigurations that some physicists think that the known laws of physics, the standardmodel and general relativity with a positive cosmological constant, occur in at leastone of them. The anthropic landscape refers to the collection of those portions of thelandscape that are suitable for supporting human life, an application of the anthropicprinciple that selects a subset of the theoretically possible configurations.In string theory the number of false vacua is commonly quoted as 10500. The large numberof possibilities arises from different choices of Calabi-Yau manifolds and differentvalues of generalized magnetic fluxes over different homology cycles. If one assumesthat there is no structure in the space of vacua, the problem of finding one with asufficiently small cosmological constant is NP complete, being a version of the subsetsum problem."Boom, there it is! The computation problem!

`NP-complete problems, or just N-problems, are ones that consume a lot of computational`

`resources for large problems. But the required resources are finite and the problems are`

`solvable. So what's the problem?`

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