There was a post a while back on "1/0", and I was disappointed to see a post of mine deleted. So I'll be brief and repeat my previous remark.

 

While 1/0 is generally undefined for fields, it is defined on the Riemann Sphere for the so-called extended complex numbers.

 

On this complex manifold, 1/0 = [tex]\infty[/tex], the "point at infinity".

 

Wolfram|Alpha and Mathematica implement this sort of complex arithmetic, albeit a bit inconsistently. Here's what Wolfram|Alpha thinks 1/0 is:

http://www.wolframalpha.com/input/?i=1%2F0

What is your point (question)?

No question really, just registering a complaint.

 

I'll get off my soap-box now I suppose.

The latex tags use math

 

[math]\infty[/math] gives you [math]\infty[/math]

 

I don't see where any posts have been deleted.