FOM: Shelah talk

[Matthew Frank]

People might be interested to hear what Saharon Shelah said in
his talk at the AMS meeting on Mathematical Challenges of the 21st
Century:

(aleph_omega) ^ (aleph_nought) < aleph_(aleph_4))

and we would like to know if the right hand side can be reduced.
He pointed out that this is of interest as a question of cardinal
arithmetic different from the continuum hypothesis, perhaps not as
independent of ZFC.  --Matt