This is what I've seen: there are ways that rearranging infinite series sums doesn't work. Most of the time if you get an answer like Z=1/0 then something's gone wrong.

## Infinity or -1/12

This is what I've seen: there are ways that rearranging infinite series sums doesn't work. Most of the time if you get an answer like Z=1/0 then something's gone wrong.