From what I can understand, Deolalikar’s main innovation seems to be to use some concepts from statistical physics and finite model theory and tie them to the . It was my understanding that Terence Tao felt that there was no hope of recovery: “To give a (somewhat artificial) analogy: as I see it now, the paper is like a. Deolalikar has constructed a vocabulary V which apparently obeys the following properties: Satisfiability of a k-CNF formula can.

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So the characterization this paper is attempting does not seem to me to be about the right category of object. Our machine learning experts take care of the set up. As much as everyone wants to know the truth on how P relates to NP, I get a feeling that theoretical computer science, complexity theory in the least, will start to look a bit pale if the question is resolved.

However, both range and deola,ikar limited interaction models that underlie LFP algorithms can only furnish such independent parameters to describe their solution spaces. Such proof would have to cover all classes of algorithms, like continuous global optimization.

Many other important problems, such as some problems in protein structure predictionare also NP -complete; [30] if these problems were efficiently solvable it could spur considerable advances in life sciences and biotechnology.

Some of the walls in pgoof building were covered with framed certificates of innovations made by local employees. Then, all such languages in P can be expressed in first-order logic with the addition of a suitable least fixed-point combinator. He never gave a precise definition of that, the number of parameters required, which is according to his own words the key idea. Why is P not equal to NP is so hard to prove?

Think of this way: The former has not been read, revised, and understood by many people over years of hard thought, while deeolalikar latter has.

Fatal Flaws in Deolalikar’s Proof? | Gödel’s Lost Letter and P=NP

He asked a few for comments and uploaded the manuscript on the net. Please do not put yourself in the same boat as Vinay — this discussion is not about rest of mathematical community vs HP researchers.


To see this, consider the EDGE decision problem which asks if there is an edge in a graph. It is also possible to consider questions other than decision problems. Actually, you need a pseudorandom generator that builds for each n a pseudorandom circuit, and then the R x,y predicate asks for a whatever function in n x if there is a whatever function in n long y for which the output of the circuit is 1.

AI warfare is the most likely resolution of Fermi’s paradox. I deolalikag I learned three things: Similarly, NP is the set of languages expressible in existential second-order logic —that is, second-order logic restricted to exclude universal quantification over relations, functions, and subsets.

The cost of this is, on balance, considerable enough to be of some concern.

Apparently, number of parameters has to do with Gibbs potential representation and Hammersen Clifford theorem. Then you have to build up a pseudorandom circuit, take a fixed x, and… How to continue?

At each stage, the successor distance is doubled, so in stages we have the whole ordering. Some of this is detailed in sections 4 and sections 7 but still fuzzy to me. Note that the definer can choose D. These links are taken from Vinay Deolalikar’s web page.

Deolalikar Responds To Issues About His P≠NP Proof

The wiki is a good collection of resource materials. Suppose Alice is working on the Riemann Hypothesis. Advances in linear and integer programming.

Home Questions Tags Users Unanswered. The ordering is defined by taking deolalkar transitive closure of the successor relation. This is what we will exploit. It seems that the most damaging statement of Neil is: To put it another way, I now think that what Deolalikar really proves in the paper is not that P! Let us wait for Vinay to respond.

Scientific proof of “P ≠ NP” math problem proposed by HP Labs’ Vinay Deolalikar

We only need note that the linear nature of XORSAT solution spaces mean there is a poly log n -parametrization the basis provides this for linear spaces. I give some examples of this on the wiki at. This is false and so her lemma has to be re-thought I have worked on a much less important problembut one where the principle played a role. Second, there are types of computations which do not conform to the Turing machine model on which P and NP are defined, such as quantum computation and randomized algorithms.


They don’t actually point to a place where the proof is wrong. But there is some satisfaction that comes from writing up a completely detailed proof. But assuming the existence of highly complex key-spreading algorithm, isn’t it unlikely for the second case to be in P? This is a common way of proving some new problem is NP -complete.

Of course, the desire for unshared glory may occur even without any financial motivation tied to it; indeed, I think for most academic types, the former would be a far stronger motivator than the latter. I thank you all for your kind interest.

P versus NP problem – Wikipedia

Solutions to the original problem when we project have various sizes of preimage sets in projection and hence you cannot perform this trick to get a uniform distribution. Cosmic justice, if you like. Fixed a link to an unrelated Quora question.

What about the following question: This will read state of the cell using a fixed graph. That is, there are problem instances with the SAME solution space structure. But they only explain why NP problems may have a simple solution space via Valiant-Vaziraniand not why a problem in P may have only complicated solution spaces.

Retrieved from ” https: One is that “intriguing structure in the solution space is not sufficient for NP hardness”. So it is still conceivable that the solution-generation problem is easy for all P problems, and hard for SAT.

These barriers are another reason why NP -complete problems are useful: