Template:Did you know nominations/Distinguishing coloring


 * The following is an archived discussion of the DYK nomination of the article below. Please do not modify this page. Subsequent comments should be made on the appropriate discussion page (such as |this nomination's talk page, the article's talk page or Wikipedia talk:Did you know), unless there is consensus to re-open the discussion at this page. No further edits should be made to this page.

The result was: promoted by Victuallers (talk) 22:07, 18 August 2015 (UTC)

Distinguishing coloring

 * ... that six or more keys on a keyring can be distinguished from each other by coloring the keys using only two colors (pictured), but rings of fewer keys require more colors?


 * Reviewed: Beta Cephei variable

Created by David Eppstein (talk). Self-nominated at 23:19, 9 August 2015 (UTC).


 * Symbol voting keep.svg Age, length, neutrality fine (do we do POV maths articles? Are there Pi-deniers?); no copyvio or plagiarism from the sources that I can access; the sources almost made my head explode and this article only gave me a mild headache, so they can't be closely paraphrased; lovely QPQ; hook intriguing; hook fact cited; photo free of restrictions and clearly visible at DYK size; paintwork on the keys is a bit sloppy, but that's not a DYK criterion, so we'll have to let that pass. Good to go. Belle (talk) 10:43, 10 August 2015 (UTC)
 * Thanks! Re the $\pi$-deniers: Yes, they exist. Try looking up tauism. Or for a quck start you could try Vi Hart's videos on the subject, such as https://www.youtube.com/watch?v=5iUh_CSjaSw —David Eppstein (talk) 04:05, 12 August 2015 (UTC)