On Jun 20, 11:50 am, WM <mueck...@rz.fh-augsburg.de> wrote: > On 20 Jun., 20:25, FredJeffries <fredjeffr...@gmail.com> > > > > > No. A sequence is a function with domain the natural numbers. > > And what is an ordered countable set?
An ordered set where the underlying set is countable. You teach mathematics and are ignorant of such things?
> > However, have you really not understood that the sets of a sequence of > sets can be unioned? (You have had a blackout. That happens.)
The range of the sequence can be unioned. You don't understand the difference between a function and its range?