Originally Posted by ganzfeld
Sorry, I didn't think I was ambiguous: ∑π doesn't make any sense. How (and why) would one sum a constant?
I think it doesn't work well as a joke because it uses two Greek letters in a row but expects the reader to interpret them in contradictory ways: the first by the mathematical concept it represents (but not its name), and the second by its name (but not its mathematical concept). I got the gist of the joke, but not its specifics, because I kept reading the sequence as "i 8 sigma pi."