Wikipedia:Reference desk/Archives/Mathematics/2012 June 6

Welcome to the Wikipedia Mathematics Reference Desk Archives
The page you are currently viewing is a transcluded archive page. While you can leave answers for any questions shown below, please ask new questions on one of the current reference desk pages.

June 6

Elliptic spiral

What is/are the parametric equation/s of an elliptic spiral?--86.125.178.4 (talk) 09:54, 6 June 2012 (UTC)

I've not heard of there being a particuar curve called the elliptic spiral. As a generic idea I'd gues it just means the sort of curve you'd see if you looked at one of he normal spirals at an angle. To get that sort of thing just squashing the y axis by some factor would do the job. Dmcq (talk) 11:23, 6 June 2012 (UTC)

So you'll want something like

$x=2\theta \cos \theta$

$y=\theta \sin \theta$

-- Meni Rosenfeld (talk) 11:59, 6 June 2012 (UTC)

What is larger?

from grahams number. G64^G64 or G65? 203.112.82.2 (talk) 23:58, 6 June 2012 (UTC)

G65 is much much larger. Rckrone (talk) 04:25, 7 June 2012 (UTC)

A forgivably severe understatement. --COVIZAPIBETEFOKY (talk) 13:33, 7 June 2012 (UTC)

G64 or 3->3->3->3? --84.61.149.75 (talk) 20:20, 8 June 2012 (UTC)

Conway chained arrow notation#Graham's number --COVIZAPIBETEFOKY (talk) 03:48, 9 June 2012 (UTC)

What about 2->2->2 ... 2->2->2, with G64 arrows? --84.61.149.75 (talk) 14:48, 9 June 2012 (UTC)