Wikipedia:Reference desk/Archives/Mathematics/2013 October 24

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October 24

Location of Boards in moat crossing problem with # Boards > 2.

I know that in the geometric moat crossing problem that the maximum size moat can be crossed by putting the first board diagonally across a corner on the outer side and then putting the second board on top of the inner corner and the middle of the first board. Various places like Mathworld indicating that with more than 2 boards you can cross an even wider moat, but I guess I'm not seeing how they would be positioned with 3 boards.Naraht (talk) 16:44, 24 October 2013 (UTC)

(Generally unhelpful answer) We don't seem to have an article on this, unless it has another name (Gaussian moat is something different, I think). The MathWorld reference is here, but the reference to the n-plank version just redirects to the PTC home page. AndrewWTaylor (talk) 17:14, 24 October 2013 (UTC)

Gaussian Moat is very different and I don't know if there is any place that would have the PTC information. I'll try archive.org.Naraht (talk) 17:37, 24 October 2013 (UTC)

Found at least the first on archive.org https://web.archive.org/web/20070730162532/http://www.mathcad.com/library/LibraryContent/puzzles/soln26/soln26.html Gives a maximum size of moat that can be crossed as n goes to infinity (where n = 3k+2)Naraht (talk) 17:48, 24 October 2013 (UTC)

ArXiv password demanded for submission to Journal of Combinatorics

I'm attempting to submit a paper for the first time to Journal of Combinatorics. There is a field for ArXiv identifier and password, in case the paper has been posted to the ArXiv, which mine has. I do not know what they mean by the password, unless of course they mean my login password or the code you distribute to co-authors to claim ownership, neither of which I am going to provide.

I tried leaving the password field blank, but that didn't work. Does anyone have any idea what this means? Thanks 50.103.254.143 (talk) 22:48, 24 October 2013 (UTC)

Did you try emailing the journal to ask for clarification? —SeekingAnswers (reply) 20:28, 25 October 2013 (UTC)