# Symbol question

1. Dec 21, 2004

### brute26

does anyone know what the symbol that looks like a tall pi means?

2. Dec 21, 2004

### chroot

Staff Emeritus
You mean this symbol?

$$\prod{i}$$

If so, it means "the product of all values i." It's a cousin of the summation sign,

$$\sum{i}$$

which means "the sum all values i."

- Warren

3. Dec 21, 2004

### brute26

so much better. thank you.