Skip to main content
29 events
when toggle format what by license comment
Apr 13, 2017 at 12:32 history edited CommunityBot
replaced http://cstheory.stackexchange.com/ with https://cstheory.stackexchange.com/
Feb 3, 2014 at 5:02 comment added vzn oh MAT cites Schaefer dichotomy thm / wikipedia. so more specifically, are there any other thms that are known to be similar to that one?
Feb 1, 2014 at 19:00 vote accept Mohammad Al-Turkistany
Feb 1, 2014 at 18:08 comment added vzn this question seems to allude to a "dichotomy thm" analog possibly from somewhere else; are there any examples of other "dichotomy thms" along these lines in the literature?
Jan 31, 2014 at 23:51 answer added Joshua Grochow timeline score: 7
Jan 30, 2014 at 20:20 comment added David Eppstein The restriction to NP problems does nothing to prevent examples such as the GI-complete one in my answer.
Jan 30, 2014 at 18:17 comment added Mohammad Al-Turkistany @Kaveh I'll miss you as an excellent moderator. Thanks for your service.
Jan 30, 2014 at 17:18 comment added Kaveh @Mohammad, I removed CW flag, please be more careful with your future edits so it doesn't become CW automatically again.
Jan 30, 2014 at 17:17 history wiki removed Kaveh
Jan 30, 2014 at 13:00 answer added David Richerby timeline score: 5
Jan 30, 2014 at 12:28 comment added David Richerby Your edit seems to be restricting to properties that are already in NP. Also you don't need to exclude problems that have either a finite number of "yes" instances or a finite number of "no" instances because any such problem is trivially in P so could not be a counterexample to your proposed dichotomy.
Jan 30, 2014 at 11:06 history edited Mohammad Al-Turkistany CC BY-SA 3.0
added 10 characters in body
Jan 30, 2014 at 10:05 history edited Mohammad Al-Turkistany CC BY-SA 3.0
added 572 characters in body
Jan 30, 2014 at 8:21 answer added David Richerby timeline score: 3
Jan 30, 2014 at 7:42 answer added David Eppstein timeline score: 11
Jan 30, 2014 at 4:32 history tweeted twitter.com/#!/StackCSTheory/status/428747488603148288
Jan 30, 2014 at 3:15 comment added Mohammad Al-Turkistany @JoshuaGrochow Thanks for your comment. I hope that the four examples I gave would provide "working" definition of natural interesting property of cubic graphs. Personally, I conjecture that deciding any natural interesting property of cubic graphs is $NP$-complete.
Jan 30, 2014 at 3:04 comment added Joshua Grochow Interesting question! But in order to get a dichotomy theorem I think one would have to pick a defn of "natural interesting property." Maybe isomorphism-invariant is enough (all your examples are, and I would think all natural examples ought to be), despite the fact that surely some iso-invariant properties might not seem "natural." A P/NP-hard dichotomy for iso-invariant properties of cubic graphs would be a very interesting theorem. (I say NP-hard and not NPC b/c one can probably cook up an iso-invariant property that is, e.g., PSPACE-complete by considering some game on the graph.)
Jan 30, 2014 at 2:52 history edited Mohammad Al-Turkistany CC BY-SA 3.0
added 10 characters in body
Jan 30, 2014 at 2:32 history edited Mohammad Al-Turkistany CC BY-SA 3.0
added 265 characters in body
Jan 30, 2014 at 2:26 history edited Mohammad Al-Turkistany CC BY-SA 3.0
added 265 characters in body
Jan 30, 2014 at 2:11 history edited Mohammad Al-Turkistany CC BY-SA 3.0
added 3 characters in body
Jan 30, 2014 at 1:56 history edited Mohammad Al-Turkistany CC BY-SA 3.0
added 3 characters in body
Jan 29, 2014 at 23:14 history edited Mohammad Al-Turkistany CC BY-SA 3.0
added 7 characters in body
Jan 29, 2014 at 22:44 comment added Mohammad Al-Turkistany Although the following does not answer the above question, I am interested in polynomial-time decidable natural interesting properties of cubic graphs. If no such examples exist, It is natural to conjecture that deciding any natural interesting property of cubic graphs is $NP$-complete.
Jan 29, 2014 at 22:38 history edited Mohammad Al-Turkistany CC BY-SA 3.0
added 44 characters in body
Jan 29, 2014 at 22:25 history edited Mohammad Al-Turkistany CC BY-SA 3.0
added 74 characters in body
Jan 29, 2014 at 22:16 history edited Mohammad Al-Turkistany CC BY-SA 3.0
added 386 characters in body
Jan 29, 2014 at 21:52 history asked Mohammad Al-Turkistany CC BY-SA 3.0