Intuitionize nn0ge2m1nn in iset.mm
Intuitionize nn0ge2m1nn in iset.mm

The proof is pretty much the same, but the logic needs rearranging
around where we rule out the case that 2 <_ N and N = 1 . It seems
like there might be a more concise way to do this than what I came
up with, but this does work and is at most a few extra steps.

metamath/set.mm,metamath/set.mm,metamath/set.mm