# Number Theory Symbol

1. Dec 5, 2007

### jbowers9

What does the symbol Î mean in number theory? As in...
Prove if r,s Î Z, then 4r + 6s is even...

Also, where can I find a website with a comprehensive math symbol index?

2. Dec 5, 2007

### cristo

Staff Emeritus
It should be $\in$. There's probably some conflict where they both use the same code or something like that.

3. Dec 5, 2007

### Staff: Mentor

Cristo is pointing out that what you see is a font translation/rendering problem, and quite correctly. I've had things like that happen and confuse the living ... out of me.

4. Dec 5, 2007

### Gokul43201

Staff Emeritus