This is usually written as

## e^{iπ}+1=0

so that it has all the important numbers:

e the base of the natural logs.

i the square root of minus one.

pi the ratio of the circumference to the radius of a circle.

: nothing.

1: unity.

mblase: thanks for telling me about Π., but it works as well as π does. It just gives a block on

Opera on my machine.

D'Oh!