hi all, does anyone here have experience with logspace reducability? in particular Im interested in the "emptiness of CFL" problem which has been proven P...
... Yes : anytime I read your prose... Take care! Po;-))) ... -- PôËt @:~?} Happy Moderator of PisNP@yahoogroups.com http://groups.yahoo.com/group/PisNP/ "La...
Hi Vlad, ... Not exactly sure what you have in mind by "recent work on this", seeing as how the CFL emptiness problem P-completeness result dates back to the...
which is the most efficient algorithm of finding a k-clique in a graph G(V, E). According to Cormen, it is nCk * k(Squared); but has there been any better...
hi KLVE. thanks for the P time completeness ref. somehow I was recently wondering if one could study P vs NP via P time completeness. (I posted on this on...
Hello, I have learnt that there are infinite turing machines which compute a function. The logic given is that, for a given function, there exists a turing...
... Hello, It looks like the value of c may depend on the number of states of the O(logn) space machine, which may then be dependent on the original Ptime...
tx for reply. I thought this too but then hopcroft/ullman go on to say that if CFL emptiness has a Dspace(log(n)^k) algorithm then P is contained in...
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... Hi all, Any Feedback welcome! Bests Ranj. ... 20AND%20CO-NP%20%21%3D%20P.pdf...
Hello, ... If we have a Dspace(log(n)^k) algorithm A for CFL emptiness, we can decide every L in P as follows (assuming R is a log space reduction from L to...
hi all, I wonder if there is any info in the literature on what P!=Pspace would mean for P!=NP!=coNP ...? has anyone seen something like that? ps fyi, sipser...
Hi everybody I got the address of this group from COMP.THEORY newsgroup. I need a help to prove this - from Intro to the theory of computation, chapter 9....
Hi Jack, ... I don't have the text handy right now, but I believe that the approach you want to use is this: Take the construction Sipser uses in the proof...
Thanks Kurt. But I`m still stuck and I don`t from where I can original 1975 paper. could you please help more. Thanks jack ... <jackop1979@y...> ... approach ...
Hi again, ... When I have a chance, I'll take a look at the Sipser proof and make some suggestions (but I'm not sure how soon I'll have a chance to do that). ...
Hi : I'm a biologist/bioinformatician. I'm looking for a sample implementation for context-sensitive-HMM. Would anyone provide some reference implementation...
Can anyone solve following problem? Pove that 3SAT is polynomial reducible to the language R, R={ REX | REX is a regular expression such that the language of ...
Hi, I hope you have thought and solved this problem so far. If you haven't, here is the answer: Problem: Prove for every language A, there is a language B such...
Porve for every language A, there is a language B such that A is turing reducible to B ( A<B) but B is not Turing reducible to A. Solution: We know that for...
Pls. help me Let c1 xn + c2xn-1+…+ cnx + cnx + cn + 1 be a polynomial with a root at x = x0. Let Cmax be the largest absolute value of a c1 . Show that ......
Hello, How do i configure my grub so that i can start running a program of my intrest without loading the operating system. In the info page of grub it is...
Hi, ... I couldn't help noticing that someone using the handle 'jackop' has been posting problems from Sipser chapter 9 in several different forums recently,...
Hi, all guys.I have a problem below: there are many manhattan polygons in a box, and space in them regarded as occuppied already. Now we want to find the...
... Linear in what? You're not very precise with your problem statement. At first sight [0] a generic sweep style algorithm would to the trick. Only occupied...
Hi Nima, ... I think your corollary should be that R is NP-hard, not NP-complete. I happened, just by coincidence, to be looking at this problem in Lewis and...
Hello frnds can any one of you suggest me some sites(softwares) that have C programming for Robotics with simulation..ie.,if i write a program in C for...
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