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Sorry if this is inappropriate to ask on meta, but back in April I updated an old answer of mine that is over two years old here, on the existence of a zero sum subset problem. I suspect due to how old this question is, no one has even noticed that I updated my answer.

I believe I have given a correct solution, but being as I am not a professional mathematician, I have been unable to find a qualified person to check it for me. If anyone would be willing to give some feedback it would be much appreciated.

Thanks!

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    $\begingroup$ You likely should notify OP of the question (via a comment on the question) or perhaps still better (as it works in this case) via a comment (directed at them) on your answer. $\endgroup$
    – user9072
    Jun 9 '14 at 23:31
  • $\begingroup$ On an unrelated note, it seems you have two accounts, one of which is unregistered. Perhaps you should ask the moderators to merge your accounts. $\endgroup$ Jun 10 '14 at 1:10
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    $\begingroup$ We no longer merge accounts ourselves. Writing to community@stackexchange.com with the details of the pair of accounts usually results in prompt action, however! $\endgroup$ Jun 10 '14 at 1:51
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    $\begingroup$ I am grateful that David Speyer has responded in comments and although my approach may end up working out, as posted it is not a correct solution. I will however continue working on the problem. $\endgroup$
    – user49545
    Jun 10 '14 at 19:40

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