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NP-Complete Problems and Physical Reality (2005)

arxiv.org

11–20 of 34 posts

Re: NP-Complete Problems and Physical Reality (2005)

#11
post #4

"But another reason we believe P≠NP is that otherwise mathematical creativity could be automated!" I have a problem with this. Just because the thought is unpleasant does not make it true or false. Besides, perhaps this is the very difference between automation and intelligence, perhaps the point at which you can ask this of a computer is the point at which you should no longer consider it a computer.

Right, it is automated. we are the machine that automates it.

Re: NP-Complete Problems and Physical Reality (2005)

#12
post #8

I posted this link because (a) it seemed like a good survey of the subject, and (b) I felt like I almost understood most of it. Does anyone have any suggestions for accessible further reading at the intersection of computer science and physics?

His Philosophy-Complexity paper is also fantastic, in case you have not read it already: http://www.scottaaronson.com/papers/philos.pdf It has also been discussed most recently here: https://news.ycombinator.com/item?id=9061744

Thanks. I'll definitely be reading those.

Aaronson's talk on Computational Complexity and the Anthropic Principle [1] also looks interesting.

[1] http://www.scottaaronson.com/talks/anthropic.html

Re: NP-Complete Problems and Physical Reality (2005)

#14
post #4

"But another reason we believe P≠NP is that otherwise mathematical creativity could be automated!" I have a problem with this. Just because the thought is unpleasant does not make it true or false. Besides, perhaps this is the very difference between automation and intelligence, perhaps the point at which you can ask this of a computer is the point at which you should no longer consider it a computer.

There is zero reason to believe that human level mathematical creativity is computationally significantly more expensive than normal day to day thinking.

Re: NP-Complete Problems and Physical Reality (2005)

#16
post #4

"But another reason we believe P≠NP is that otherwise mathematical creativity could be automated!" I have a problem with this. Just because the thought is unpleasant does not make it true or false. Besides, perhaps this is the very difference between automation and intelligence, perhaps the point at which you can ask this of a computer is the point at which you should no longer consider it a computer.

Sure, it is certainly possible that mathematics can be automated, but mathematics is also over 2000 years old. We are not much closer to automating it than the Greeks were. P=NP does not only break the Complexity theory (which is a relatively new invention), it also has profound consequences to all of human reasoning.

We already have commoditised math solvers for any number of (relatively) trivial problems.

What we haven't automated is mathematical creativity, which is a completely different class of problem.

Re: NP-Complete Problems and Physical Reality (2005)

#17

If you enjoyed this I highly recommend both his book, "Quantum Computing Since Democritus", and blog ( http://www.scottaaronson.com/blog/ ). Tagline of the blog is "If you take just one piece of information from this blog: Quantum computers would not solve hard search problems instantaneously by simply trying all the possible solutions at once."

Wholeheartedly recommend this book as well. He gives a brief overview of classical complexity, how quantum matrices work, then how quantum complexity works. It's really accessible to those with some complexity background.

Re: NP-Complete Problems and Physical Reality (2005)

#18

On the point of anthropic computing: it is important to note that you have not accomplished any _improvement_ to your condition by killing yourself; before as after, you had found a correct solution with probability 2^-n. Anthropic computing is just "fancy guessing". What is interesting about it to me is that the "true computational nature of reality" must be such that sufficient computation is available for you to r…

By running the validation "in parallel", do you mean running it in each of the possible quantum "many worlds" in which validation takes place?

If so, aren't you implicitly assuming that these other parallel worlds somehow draw on a shared pool of computing resource? This might be true [1], but equally there may not be a "behind the scenes" of reality at all.

[1] How would we know? Run a timing attack on the underlying compute infrastructure?

Re: NP-Complete Problems and Physical Reality (2005)

#19

If you enjoyed this I highly recommend both his book, "Quantum Computing Since Democritus", and blog ( http://www.scottaaronson.com/blog/ ). Tagline of the blog is "If you take just one piece of information from this blog: Quantum computers would not solve hard search problems instantaneously by simply trying all the possible solutions at once."

Detailed notes and problem sets for a series of twenty-one(!) lectures based on the book are at [1].

[1] http://www.scottaaronson.com/democritus/

Re: NP-Complete Problems and Physical Reality (2005)

#20

On the point of anthropic computing: it is important to note that you have not accomplished any _improvement_ to your condition by killing yourself; before as after, you had found a correct solution with probability 2^-n. Anthropic computing is just "fancy guessing". What is interesting about it to me is that the "true computational nature of reality" must be such that sufficient computation is available for you to r…

How is killing yourself a correct solution to anything, and what is "n" in your equation? Humans are experience integrators with the rather interesting (and unique) opportunity to "emit" the useful integrations that make it easier (or possible) for others to perform a similar integration. We do it on a personal level with children and friends; and on an impersonal level with books and papers.
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