On 8/22/2012 2:44 PM, meekerdb wrote:

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 my point, we have to use meta-theories of one sortor another to evaluate theories. Occam's Razor is a nice example...My point is that explanations should be hard to vary and get theresult that one needs to "match the data" or else it is not anexplanation at all. One can get anything they want with a theory thathas landscapes. Look!http://en.wikipedia.org/wiki/String_theory_landscape"The string theory landscape or anthropic landscape refers to thelarge number of possible false vacua in string theory. The"landscape" includes so many possible configurations that somephysicists think that the known laws of physics, the standard modeland general relativity with a positive cosmological constant, occurin at least one of them. The anthropic landscape refers to thecollection of those portions of the landscape that are suitable forsupporting human life, an application of the anthropic principle thatselects a subset of the theoretically possible configurations.In string theory the number of false vacua is commonly quoted as10500. The large number of possibilities arises from differentchoices of Calabi-Yau manifolds and different values of generalizedmagnetic fluxes over different homology cycles. If one assumes thatthere is no structure in the space of vacua, the problem of findingone with a sufficiently small cosmological constant is NP complete,being a version of the subset sum problem."Boom, there it is! The computation problem!NP-complete problems, or just N-problems, are ones that consume a lotof computational resources for large problems. But the requiredresources are finite and the problems are solvable. So what's theproblem?Brent --

`It is all about how big the finite problems grow to and whether or`

`not their demand for resources can be kept up with the load. It seems to`

`me that Nature would divide up the labor into as many niches as possible`

`and have a distributed "on demand" system rather than a single top down`

`computation system.`

-- Onward! Stephen "Nature, to be commanded, must be obeyed." ~ Francis Bacon -- You received this message because you are subscribed to the Google Groups "Everything List" group. To post to this group, send email to everything-list@googlegroups.com. To unsubscribe from this group, send email to everything-list+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/everything-list?hl=en.