Talk:Hopcroft-Karp algorithm
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This needs an explanation of the "run really fast" step (http://www.fysh.org/~katie/computing/methodologies.txt)
[edit] Maximum vs. maximal
Changed the incorrect "maximum" to "maximal". —The preceding unsigned comment was added by 80.145.225.62 (talk • contribs) 22:44, 3 October 2006 UTC.
- I agree. Thanks for persisting after the incorrect revert. —David Eppstein 05:55, 4 October 2006 (UTC)
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- I am sorry for the incorrect revert. I now think that I was wrong. I started this article because the algorithm was mentioned in the text of another article. The only reference I had was CLRS, where it said maximum. So when I saw this edit from an unregistered user, I checked in CLRS, saw that it said maximum, and assumed that the editor was either in error or mischevious. Sorry about this. Let me check that we agree with terminology:
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- If we go through a one-dimmensional state-space (x-axis below), where each state has a value (y-axis below),
B
/\
A / \
/\ / \
/ \ / \
/ \/ \
/ \
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- then here both A and B are maximal points, while only B is a maximum. This is the terminology used in the article Matching.
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- The description in CLRS is actually just given as an exercise. I tried to solve it, but could not see how to find "maximum set of vertex-disjoint shortest augmenting paths" in O(V + E), so I just wrote the pseudocode for the algorithm as described, and put it in my ever-growing TODO to figure out the missing part. I now found a description of the pseudo-code which still says maximum in the comments, but the code clearly gives only something maximal. So the problem was simpler than I thought :) Thanks for the correction, and sorry about my error. Klem fra Nils Grimsmo 09:16, 4 October 2006 (UTC)
[edit] Difference from Dinic algorithm (Dinits' algorithm)?
What's the difference between this algorithm and Dinic algorithm? To me, it just looks like Dinic algorithm - only run on a specific input, so it has better time complexity than general-case Dinic. --Lukas Mach 22:27, 27 December 2006 (UTC)
- It's none... H-K is 1973 algorithm and Dinic is 1976 algorithm. --Lukas Mach 01:55, 26 February 2007 (UTC)
