Duncan has been wondering if it's theoretically possible to have more than infinity-- or to put it another way, to discuss "infinity" as a quantifiable thing, which you could manipulate as if it were just a number, or set.

To help with talking about the notion, he came up with the following nomenclature:

• ∞ × 10: Aen (rhymes with "aim")
• ∞ ²: Den
• ∞ × Den: Zen
• ∞ × Zen: Fen
• ∞ × Fen: Fen Infinity
• ∞ × Fen Infinity: Zzen (pronounced "zeh-zen")

He intuitively seems to realize that naming things is helpful when dealing with the abstract-- his favorite example is the whole "Googol"-"Googolplex"-"Googolplexian" thing.