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There are many question that pose a none obscure problem and ask for the "best" algorithm, whatever "best" means.

For example, Given a graph, decide if its edge connectivity is at least n/2 or not,

The normal process is to search the literature with every single name of the problem, and find a recent paper. Usually the "best" result will be the one of the references. A more recent approach is to ask the question here.

Are there websites specifically dedicated with information like this? A database of problems and list of algorithms with their complexities? I am imagining an OEIS for problems instead of integer sequences.

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  • $\begingroup$ See this question, I think this should be closed as duplicate. $\endgroup$
    – Kaveh
    Sep 6, 2011 at 6:00
  • $\begingroup$ I was not aware of that post. The answers do indicate no satisfactory resource exists. This should be closed. $\endgroup$
    – Chao Xu
    Sep 6, 2011 at 6:20
  • $\begingroup$ I agree that this question is a duplicate in spirit. However, this question is amore general than the linked one; in title at least. Although this answer would answer this more general question, the other answers are specific to NP-hardness results and/or are discussions. Thus it would be a little awkward to close it as "exact duplicate", no? $\endgroup$
    – Artem Kaznatcheev ♦
    Sep 6, 2011 at 6:41

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There's an attempt to build such a resource. It's called the Complexity Garden and is "the botanical companion to the Complexity Zoo". Also see this meta discussion.

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