Skip to main content
18 events
when toggle format what by license comment
Apr 13, 2017 at 12:58 history edited CommunityBot
replaced http://mathoverflow.net/ with https://mathoverflow.net/
Sep 12, 2016 at 18:28 history edited José Hdz. Stgo. CC BY-SA 3.0
added a link
Sep 28, 2012 at 2:34 history edited José Hdz. Stgo. CC BY-SA 3.0
deleted 72 characters in body
Feb 19, 2012 at 0:05 history edited José Hdz. Stgo. CC BY-SA 3.0
deleted 107 characters in body
Nov 20, 2011 at 8:19 history edited José Hdz. Stgo. CC BY-SA 3.0
added 23 characters in body; Post Made Community Wiki
Nov 22, 2010 at 21:44 comment added darij grinberg Sorry, I meant $\frac15\left(\left(\frac{a}{2}\right)^2\pm 1\right)$.
Nov 22, 2010 at 21:42 comment added darij grinberg ... smaller by means of jumping from one rational solution to another via Vieta).
Nov 22, 2010 at 21:42 comment added darij grinberg Seriously I only find (1) and (5) of any interest. The rest are basically negative results (including (2) which is equivalent to saying that no Fibonacci number beyound $3$ is a power of a prime $\equiv 3\pmod 4$) and not particularly exciting (though this does not mean their proofs are simple!). As for (1), this looks to me like a variation on the Pell theme: if $a$ is even, then we are talking about whether $\left(\frac{a}{2}\right)^2\pm 1$ is a perfect square, which is Pell. I assume that the general case is, similarly, a matter of "Vieta jumping" (inductively making the unknowns ...
Nov 22, 2010 at 20:30 history edited José Hdz. Stgo. CC BY-SA 2.5
added 18 characters in body
Nov 22, 2010 at 20:14 history edited José Hdz. Stgo. CC BY-SA 2.5
added 16 characters in body
Nov 21, 2010 at 4:25 history edited José Hdz. Stgo. CC BY-SA 2.5
added 148 characters in body; deleted 9 characters in body
Nov 21, 2010 at 4:18 history edited José Hdz. Stgo. CC BY-SA 2.5
added 298 characters in body
Apr 9, 2010 at 4:04 comment added Pete L. Clark These are very striking results. Already I find 1) very surprising!
Feb 1, 2010 at 0:06 history edited José Hdz. Stgo. CC BY-SA 2.5
deleted 2 characters in body
Jan 17, 2010 at 1:06 comment added Michael Lugo An alternate proof of (3) probably follows from the asymptotic formula for $F<sub>n</sub>$; $F_m F_n$ is between $F_{m+n-2}$ and $F_{m+n-1}$. I have not worked out the details.
Jan 17, 2010 at 0:08 history edited José Hdz. Stgo. CC BY-SA 2.5
edited body
Jan 16, 2010 at 7:43 history edited José Hdz. Stgo. CC BY-SA 2.5
added 282 characters in body; added 28 characters in body
Jan 16, 2010 at 7:28 history answered José Hdz. Stgo. CC BY-SA 2.5