[FOM] P-point/notation

pax0@seznam.cz pax0 at seznam.cz
Thu May 21 14:01:11 EDT 2009

can someone please tell me, why certain ultrafilters on \omega are called "P-points" : what "P" means here?
And the associated property of forcing notions, the "PP property": what "PP" stands for here?
I would just like to know what are these named after, not any definitions.
Thank you, Jan Pax

More information about the FOM mailing list