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Dec 31, 2017 at 19:27 comment added Sebastien Palcoux Richard J. Mathar put this sequence in OEIS on Jan 04 2012: oeis.org/A203639
Aug 20, 2014 at 16:27 answer added A. Bellmunt timeline score: 5
Feb 1, 2014 at 23:15 comment added Roland Bacher A similar question is mathoverflow.net/questions/25974/calculus-on-rationals.
Feb 1, 2014 at 15:19 history edited Daniel Soltész CC BY-SA 3.0
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Jan 21, 2014 at 15:27 history edited user9072
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Jan 13, 2014 at 2:52 answer added Daniel Soltész timeline score: 5
Oct 19, 2013 at 19:00 vote accept Daniel Soltész
Oct 19, 2013 at 18:59 history edited Daniel Soltész CC BY-SA 3.0
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Sep 28, 2013 at 18:50 history edited Daniel Soltész CC BY-SA 3.0
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Sep 22, 2013 at 14:08 history edited Daniel Soltész CC BY-SA 3.0
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Sep 22, 2013 at 11:54 comment added Lev Borisov Why wouldn't you make it distributive over products of primes: seems a bit more natural?
Sep 22, 2013 at 11:29 comment added Martin Brandenburg Note that this differs from the usual arithmetic derivative en.wikipedia.org/wiki/Arithmetic_derivative.
Sep 22, 2013 at 5:29 answer added user6976 timeline score: 22
Sep 21, 2013 at 18:27 answer added Vidit Nanda timeline score: 3
Sep 21, 2013 at 16:34 comment added Felipe Voloch I suspect $p^{p^p}$ and so on will need several steps before hitting a cycle so the answer to the second question should be no. For example $3^{27}$ takes $10$ steps before hitting a fixed point.
Sep 21, 2013 at 15:47 history asked Daniel Soltész CC BY-SA 3.0