What Does the Tall Pi Symbol Mean?

[brute26]

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

 

[chroot]

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

 

[brute26]

so much better. thank you.