🚀 go-pugleaf

On Apr 28, 2:09 pm, "G. L. Bradford" <glbra...@insightbb.com> wrote:
> "Sue..." <suzysewns...@yahoo.com.au> wrote in message
>
> news:ad4c70d4-964d-4f3e-a92f-16c126d97adc@b23g2000yqn.googlegroups.com...
> On Apr 28, 12:42 am, Pentcho Valev <pva...@yahoo.com> wrote:
>
> >http://math.ucr.edu/home/baez/physics/Relativity/SR/barn_pole.html
> > "These are the props. You own a barn, 40m long, with automatic doors
> > at either end, that can be opened and closed simultaneously by a
> > switch. You also have a pole, 80m long, which of course won't fit in
> > the barn. Now someone takes the pole and tries to run (at nearly the
> > speed of light) through the barn with the pole horizontal. Special
> > Relativity (SR) says
>
> << the four-dimensional space-time continuum of the
> theory of relativity, in its most essential formal
> properties, shows a pronounced relationship to the
> three-dimensional continuum of Euclidean geometrical space.
> In order to give due prominence to this relationship,
> however, we must replace the usual time co-ordinate t by
> an imaginary magnitude
>
>    sqrt(-1)
>
> ct proportional to it. Under these conditions, the
> natural laws satisfying the demands of the (special)
> theory of relativity assume mathematical forms, in which
> the time co-ordinate plays exactly the same rôle as
> the three space co-ordinates. >>http://www.bartleby.com/173/17.html
>
========================
>
>   "...in which the time coordinate play exactly the same role as the three
> space co-ordinates." And reality is caricatured because it does for what in
> reality is a 1-dimensional string (the most glaring example of a
> 1-dimensional string, the "observable universe") but it doesn't do -- and
> will never do -- for a multi-dimensional (represented 0-dimensional)
> singularity.

No doubt responsible for many sleepless nights for
Gerolamo Cardano.

Sue...

>
> GLB
>
> ========================