quasi
Posts:
11,467
Registered:
7/15/05


Re: Cardinality of turning wheel
Posted:
Mar 2, 2013 2:39 PM


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

