netzweltler
Posts:
278
From:
Germany
Registered:
8/6/10
|
|
Re: Cardinality of turning wheel
Posted:
Mar 4, 2013 2:00 AM
|
|
On 3 Mrz., 12:14, Brian Chandler <imaginator...@despammed.com> wrote:
> netzweltler wrote:
> > On 3 Mrz., 11:49, quasi <qu...@null.set> wrote:
> > > netzweltler wrote:
> > > >quasi wrote:
> > > >> netzweltler wrote:
> > > >> >quasi wrote:
> > > >> >> netzweltler wrote:
> > > >> >> >quasi wrote:
> > > >> >> >> netzweltler wrote:
> > > >> >> >> >What is the cardinality of the number of revolutions
> > > >> >> >> >of a turning wheel, if there is no beginning and no
> > > >> >> >> >end to it?
> <snip>
> > Meaning, that the notion of infinite speed is nonsense, right?
>
> Not necessarily, I think. But once you have a wheel rotating at
> "infinite speed", asking for the cardinality of the number of
> revolutions is like asking for the "Cardinality of an infinite set,
> any infinite set". It's hopelessly ill-defined.
>
> Brian Chandler
I see. Because there exist many infinite sets. It might be well-
defined if there was just one infinite set.
|
|
