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Feb 27 at 8:54 comment added David Roberts Not a threat, a polite request to keep the useful information here on the page. Blanking one's own posts comes under the technical name "self-vandalism" (a term of art in the SE software), and is frowned on network-wide The first edit done here would count as that, to my mind, because it removed all useful content. The second edit with the arXiv link was marginally better, but is counter to normal MO practice to update answers with new info, not replace them entirely, with a more opaque reference.
Feb 27 at 6:51 comment added David Roberts Please don't delete the content of this answer again.
Feb 27 at 6:51 history edited David Roberts CC BY-SA 4.0
proper arXiv reference, and restoring old answer content
Feb 27 at 6:49 history rollback David Roberts
Rollback to Revision 3
Feb 27 at 6:49 comment added David Roberts even better than removing a self-contained answer and citing a 12-page paper, is leaving your answer, and also citing the paper, meaning people can read the short solution here, and consult the longer paper if they want.
Feb 27 at 5:31 history edited Nemo CC BY-SA 4.0
deleted 2094 characters in body
Feb 26 at 23:35 comment added David Roberts @CaveJohnson please don't self-delete this answer, even if it has been answered elsewhere. Someone might stumble on this exact posting wanting to know the answer, and having the answer here is more helpful than if it is not here.
Feb 26 at 23:34 history rollback David Roberts
Rollback to Revision 1
Feb 26 at 20:32 comment added Nemo @SamHopkins , who cares?
Feb 13 at 13:17 vote accept Nemo
Feb 13 at 13:17 history undeleted Nemo
Feb 13 at 13:16 history edited Nemo CC BY-SA 4.0
deleted 2136 characters in body; Post Made Community Wiki
Dec 14, 2017 at 5:55 history deleted Nemo via Vote
Nov 29, 2017 at 20:57 history answered Nemo CC BY-SA 3.0