Wikipedia:Articles for deletion/Squarian digits

The following discussion is an archived debate of the proposed deletion of the article below. Please do not modify it. Subsequent comments should be made on the appropriate discussion page (such as the article's talk page or in a deletion review). No further edits should be made to this page.

The result was Delete. Shirahadasha (talk) 07:28, 25 February 2008 (UTC)[reply]

Squarian digits

Unsourced triviality. By the rules of modular arithmetic it is clear that if you take a number x whose iterated digit sum is 1,2,3,4,5,6,7,8,9 (corresponding to a remainder of 1,2,3,4,5,6,7,8,0 after division by 9), then the digit sum of x-squared will by 1,4,9,7,7,9,4,1,9. The very model of a minor general (talk) 13:14, 18 February 2008 (UTC)[reply]

Delete. The article itself says outright that this is
original research. The fact that the digital roots of squares repeat with this sequence is known: (sequence A056992 in the OEIS) but with no name or real references there either. It would be a mistake to copy everything from OEIS to here, and even more to keep an article in this form. —David Eppstein (talk) 16:43, 18 February 2008 (UTC)[reply
]

Comment Praise for Wickiflicki, who was not the first, but who reached this independently; and to Eppstein, who took the time to cite some references for the author. Perhaps a (sourced) note about this pattern can be added somewhere in the article about digit sums. I'd point out that although the pattern is interesting, there are more practical ways of finding that if 30² is 900, then 31² is 961. Think of 961 as 900+30+31; you'll see that 32² is 961+31+32. The algebra for (n+1)²-n² will lead you to 2n+1. Mandsford (talk) 22:38, 18 February 2008 (UTC)[reply]
Merge and delete to both
square numbers and to Digital_root#Some_properties_of_digital_roots. Interesting factoid, but the not worth an article in itself, plus the article title is something made up in school one day. (But let me award this the prize for the most interesting/intelligent MUISOD article.)Bm gub (talk) 23:49, 18 February 2008 (UTC)[reply
]

Delete - self-admitted OR; as the article says: "The sequence itself is up for deliberation on whether it should be added to mathematic reference literature at a date currently unknown". Gandalf61 (talk) 10:50, 19 February 2008 (UTC)[reply]
Comment The article keeps saying "digit route". What does that mean? Does it mean the sum of the digits? Michael Hardy (talk) 00:52, 23 February 2008 (UTC)[reply]
- Comment "Digit route" appears to mean digital root. Gandalf61 (talk) 08:54, 23 February 2008 (UTC)[reply]

The above discussion is preserved as an archive of the debate. Please do not modify it. Subsequent comments should be made on the appropriate discussion page (such as the article's talk page or in a deletion review). No further edits should be made to this page.