Re: Standard Topology on S^n ?



On Wed, 27 Feb 2008, Terry/Padden wrote:

<marsh@xxxxxxxxxxxxxxxxxx> wrote:

It's the easiest way.

That is a lazy - and cowardly - reason.

Hurray! As the context has been removed, the problem has disappeared. ;-)

Alternatively you could define
S^n as the one point compactification of R^n. That is,
add to R^n a point 'at infinity'.

The horror is materialising.

Lo and behold! The horror has materialized and it is you.

Why should everyday ordinary spheres have
anything to do with infinity ?

A plane is a sphere with infinite radius.

Why should everyday ordinary persons have any
thing to do with an infinitely sassy Aussi?
.



Relevant Pages

  • Re: sci.math.infinity Charter
    ... David Marcus wrote: ... I don't really think there's much of a reason to have sci.math.cantor ... A question is if others would post about infinity there instead of on ... Dang it I wanted to show you where there were all these e-mail lists ...
    (sci.math)
  • Re: Standard Topology on S^n ?
    ... That is a lazy - and cowardly - reason. ... S^n as the one point compactification of R^n. ... add to R^n a point 'at infinity'. ...
    (sci.math)
  • Re: What is infinity minus one?
    ... I think what you have is a pretty good reason. ... The reason 1*infinity is undefined, I would agree, is that infinity is ... not really a number (not in the reals). ... Department of Mathematics ...
    (sci.math.num-analysis)
  • Re: Infinity
    ... >>> It's possible that giving a definition of infinity as you do below ... >>Well, of course, Uma Thurman is quite concrete. ... We have no reason to think that Uma Thurman should be greater ... >>that the product of Uma Thurman and David C. Ullrich should again be Uma ...
    (sci.math)
  • Re: Is continuum completely filled up?
    ... of infinity, the existence of a dense ordering comes true. ... The reason that I asked you this question is to remind you that length ... I wonder what is the end of the universe, ... Don't ask me why I use the "mere" before intellect, ...
    (sci.math)