### Nice $\aleph_1$ generated non-$P$-points, I

by Shelah. [Sh:980]

We define a family of a (non-principal) ultrafilter on
N, i.e. a point which are very far from
P-points. We first under reasonable conditions, prove
its existence. In a continuation we shall prove that such
a point may exist while no P-point exists.

Back to the list of publications