On Tue, 15 Mar 2005 06:53:52 +0100 Jobst Heitzig wrote:

Dear Dave!

You wrote:

Agreed you do not need (n-1)*n/2 pairwise comparisons BUT, seems to me
ROWS went too far:
    It will happily and efficiently return the CW if there is one.
    It does not know if there is a cycle, though the winner of the n-1
comparisons will, at least, be a cycle member.

Easiest I can think of is another n-1 comparisons to see if the apparent
winner is CW or only a cycle member and, if a member, keep going til you
have the complete cycle.


That's a nice suggestion for the "justification" step of the method but it doesn't change the winner. Or did you mean to say that a method should not elect a candidate unless it "knows" in which defeat cycles s/he is?

Yours, Jobst

I suspect I did not emphasize enough so, assume we are doing only n-1, A should win, the cycle is A>B>C>A, and C is the first member found (does not matter if there is a D, for such will be discarded as soon as we have a cycle member).
PROVIDED B is the next cycle member, it will take over and recognize A as final winner when found.
BUT IF A is the next cycle member, C will reject it and accept B as final winner when that is found.


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 Dave Ketchum   108 Halstead Ave, Owego, NY  13827-1708   607-687-5026
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