
Re: set builder notation
Posted:
Aug 17, 2013 10:35 AM


lite.on.beta@gmail.com wrote: > > S = {x /in A  P(x) } > > For the set builder notation above, what we really means is: > > all things x, such that "x is element of A *and* P(x) is true" correct?
Yes.
> The vertical bar is essentially conjunction, correct?
I'm not sure it can always be read thus. Your set is also denoted
{x  x in A & P(x)}
"x and x in A and P(x)" doesn't make sense to me. Better read
{...}
as "the set of ... such that ."
 Sorrow in all lands, and grievous omens. Great anger in the dragon of the hills, And silent now the earth's green oracles That will not speak again of innocence. David Sutton  Geomancies

