Re: relation from A to B. question about prove

On Wed, 19 Oct 2005, Arturo Magidin wrote:

> In article <1129746674.956003.46330@xxxxxxxxxxxxxxxxxxxxxxxxxxxx>,
> tiratano <tiratano@xxxxxxxxx> wrote:
>
> Try to stick to plain ASCII. I think the symbols you are using are
> meant to be intersections, so I will replace them as
> such. Unfortunately, I cannot be sure.
>
> > Thus part (c) holds.
>
> That's nice. Too bad you did not write the question here as being
> composed of parts, so I have no idea what "part (c)" could possibly
> mean. You see: the government forbids me from using my telepathic and
> clairvoyant abilities for the purpose of figuring out what you are
> thinking or what problem you are trying to solve over the
> internet; they deem it a "waste", if you can believe it.

LOL. Deciphering *(%# as intersection wasn't use of psychic powers?

> Which means that unless you tell us the entire problem, I have no way of
> knowing what the heck you are trying to do or whether what you are doing
> is correct. I don't know what "part (c)" is, I don't know what R(A)
> means, and so I don't know whether your conclusion above holds.
>
Seems I recall some use of R[A] to mean
{ x | some a in A with aRx }

which comes to the same thing as R(A) when R is a function, ie
{ R(a) | a in A } = { x | some a in A with aRx }.
.

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