Re: set of all pos Z and neg Z

From: George Cox (george_coxanti_at_spambtinternet.com.invalid)
Date: 09/20/04 

Date: Mon, 20 Sep 2004 23:49:42 +0000 (UTC)

nsgi_2004 wrote:
>
> "George Cox" <george_coxanti@spambtinternet.com.invalid> wrote in message
> news:414F5CFF.41C0149B@spambtinternet.com.invalid...
> > nsgi_2004 wrote:
> > >
> > > "George Cox" <george_coxanti@spambtinternet.com.invalid> wrote in
> message
> > > news:414F52DD.220DAD7F@spambtinternet.com.invalid...
> > > > nsgi_2004 wrote:
> > > > >
> > > > > Hi,
> > > > >
> > > > > If one writes, N = {x | x is an elemenent of +Z, x is an element
> of -Z}
> > > > >
> > > > > is that the same as N = {x | x is an element of Z, x not 0}
> > > > >
> > > > > Thanks in advance.
> > > >
> > > > Yes if "x is an element of +Z, x is an element of -Z" means
> > > > "x is an element of +Z or x is an element of -Z".
> > >
> > > Hmmm, how can you tell whether a "comma" means "or" or "and" ?
> >
> > Does the source of the question offer any clues?
>
> No, it just says "Translate the following to English"

It's a text book is it? And where the {...|...} notation is first
discussed, what sort of things does it say can be in place of the second
... ?