Comments on: When do n and 2n have the same decimal digits? http://math.blogoverflow.com/2014/06/11/when-do-n-and-2n-have-the-same-decimal-digits/ The Mathematics Stack Exchange Blog Fri, 18 Sep 2015 11:57:28 +0000 hourly 1 https://wordpress.org/?v=4.5.6 By: vzn http://math.blogoverflow.com/2014/06/11/when-do-n-and-2n-have-the-same-decimal-digits/#comment-224 Tue, 26 Aug 2014 18:38:14 +0000 http://math.blogoverflow.com/?p=76#comment-224 another thought. the theme of examining digits of base-n expansions is involved in another unsolved conjecture by Erdos

]]> By: Jyrki Lahtonen http://math.blogoverflow.com/2014/06/11/when-do-n-and-2n-have-the-same-decimal-digits/#comment-24 Mon, 16 Jun 2014 18:08:54 +0000 http://math.blogoverflow.com/?p=76#comment-24 A pleasant surprise that you can deduce this much. Initially I would have thought that unless you impose a much stricter condition on the permutation, like: you get \(2n\) by moving the last digit of \(n)\ to the front (or the other way around), it would be nigh impossible to say much at all.

]]> By: vzn http://math.blogoverflow.com/2014/06/11/when-do-n-and-2n-have-the-same-decimal-digits/#comment-23 Sat, 14 Jun 2014 01:25:03 +0000 http://math.blogoverflow.com/?p=76#comment-23 interesting, nice analysis, suggest there is some way(s) to generalize it. it looks like you are considering hamilton paths on DFAs

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