What if there was something which was a further subgradient of Nirn, like how Akatosh was a subgradient of Anuiel was a subgradient of Anu?

Wouldn't that be the people of Nirn?

Interesting, but isnt the whole purpose of the Nirn to reverse the subgradience?
Reach heaven by violence and all that.

I suppose you could see Mankar's paradise and other such things created by mortals as subgradience.

Hmm... I'm not sure do i understand, but Yokudan creation myth seems to suggest that there are other pockets of existence made by escapists from other pockets. Magnus escaped along with others and some of them probably made their own Nirn. In sense that could be seen as subgradient of Nirn, but it could be seen as same subgradient as well as it's made by Et'ada (who escaped from Nirn). Just tossing idea up in display, go head and [NUMINIT] it down.

Then there's that Mankars place as Merari said, but it was in Dagon's plane wasn't it? Same with Battlespire. Hircine's hunting ground etc are made by Et'ada. Should different dreamsleeve-things be counted in as well, like Sovngarde? Maybe Vehky-Vehk is cooking something up for his own.

Or am i getting your line of thought wrong?

Ps. Oh yeah. The Amaranth, once every soul in Nirn CHIMs or other ways find their Walking Way, then Lorkhan gets his own Godhead. At that point of time all souls starts their own universes making their own "Nirns" inside Lorkhan's Godhead, those "Nirns" atleast would be subgradients of Nirn. This is how i've understood Nirn's porpuse and final meaning behind Tower. I could be wrong thou, those mushrooms i've been eating were funky. Very funky. http://www.youtube.com/watch?v=SAO-lzl3vVQ

Mortal dreams and inner existence.

Crantius and Lifts-Her-Tail are obvious downscales of Anu and Nirna.

There is something that is a further subgradient, getting there is what half of what everything has been about:

"You in the Fourth Era have already witnessed many of the attempts at reaching the final subgradient of all AE, that state that exists beyond mortal death. The Numidium. The Endeavor. The Prolix Tower. CHIM. The Enantiomorph. The Scarab that Transforms into the New Man."

I feel that all the subgradients are the result of 1+1=2 which splits into 1 and 1, ad infinitum. Padhome and Anu create Nir (of the Anuad), Nir splits into the mirror images Sithis and Anuiel, who together create Aurbis, Aurbis splits into Akatosh and Lorkhan who create Mundus.