As I understand it, that's shorthand for: redshift makes "escaping" light have a wavelength longer than the measurable extent of the universe.
Thanks, -- Raul On Fri, Aug 18, 2017 at 12:34 PM, Don Guinn <[email protected]> wrote: > I know, this remark doesn't belong in programming, but I want to respond > anyway. > > I have wondered the same thing about the statement that light can't escape > a black hole because the acceleration due to gravitational attraction > exceeds the speed of light. Seems like comparing speed and acceleration is > apple and oranges too. Maybe light can't escape, but that's not why. > > On Fri, Aug 18, 2017 at 8:16 AM, Xiao-Yong Jin <[email protected]> > wrote: > >> You can't compare quantities with different dimensions. >> It's meaningless, like saying the water in your cup in cm^3 is larger than >> your height in cm. >> >> > On Aug 17, 2017, at 9:09 PM, David Lambert <[email protected]> wrote: >> > >> > Largest spheres found in dimensionality near five and a quarter. >> > >> > Beautiful mathematics, and need string theory limit itself to integral >> dimensions? >> > >> > boxdraw_j_ 1 >> > load'~addons/math/misc/amoeba.ijs' >> > sphvol=: (1p1&^%!)@-:@] * ^ >> > g=: -@:(1&sphvol) >> > g amoeba(<16)Y=:2 1$4.1 5.8 >> > +-------+--------+ >> > |5.25692|_5.27777| >> > +-------+--------+ >> > >> > >> > On 08/16/2017 08:00 AM, [email protected] wrote: >> >> Date: Tue, 15 Aug 2017 19:33:09 +0000 >> >> From: Ben Gorte - CITG<[email protected]> >> >> To:"[email protected]" <[email protected]> >> >> Subject: Re: [Jprogramming] "n-volume" of an "n-sphere" >> >> Message-ID: >> >> <[email protected]> >> >> Content-Type: text/plain; charset="us-ascii" >> >> >> >> A little surprise (to me) was >> >> plot 1 sphvol i.30 >> >> (for example) >> >> >> >> Can you predict it? >> >> >> >> greetings, >> >> Ben >> >> ________________________________________ >> >> From: Programming [[email protected]] on behalf >> of Raul Miller [[email protected]] >> >> Sent: Tuesday, August 15, 2017 19:55 >> >> To: Programming forum >> >> Subject: [Jprogramming] "n-volume" of an "n-sphere" >> >> >> >> sphvol=: (1p1&^%!)@-:@] * ^ >> >> 1 sphvol 3 >> >> 4.18879 >> >> 1 sphvol i.7 >> >> 1 2 3.14159 4.18879 4.9348 5.26379 5.16771 >> >> >> >> Left argument is the radius of the "n-sphere". >> >> >> >> Right argument is the number of dimensions. >> >> >> >> I put "n-volume" in quotes, because if the dimension is 2 (for >> >> example), the "n-volume" is what we call the area of the circle. (And >> >> if the dimension is 1 that "n-volume" is the length of a line >> >> segment). >> >> >> >> Anyways, I stumbled across this and thought it might be interesting >> >> for someone else. >> >> >> >> Thanks, >> >> >> >> -- >> >> Raul >> > >> > ---------------------------------------------------------------------- >> > For information about J forums see http://www.jsoftware.com/forums.htm >> >> ---------------------------------------------------------------------- >> For information about J forums see http://www.jsoftware.com/forums.htm > ---------------------------------------------------------------------- > For information about J forums see http://www.jsoftware.com/forums.htm ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
