netzweltler
Posts:
425
From:
Germany
Registered:
8/6/10


Re: Cardinality of turning wheel
Posted:
Mar 2, 2013 6:14 PM


On 2 Mrz., 20:39, quasi <qu...@null.set> 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? > > For a wheel revolving forever (both past and future), the > set of revolutions is in onetoone correspondence with the > set of integers, hence has cardinality aleph0. > > quasi
Is this still true, if the wheel is revolving at infinite speed, meaning, that we can see at least one revolution no matter how small the time we are watching it?

