Acta Universitatis Carolinae. Mathematica et Physica Jana Flašková A note on J-ultraﬁlters and P -points Acta Universitatis Carolinae. Mathematica et Physica, Vol. 48 (2007), No. 2, 43--48 Persistent URL: http://dml.cz/dmlcz/702117 Terms of use: © Univerzita Karlova v Praze, 2007 Institute of Mathematics of the Academy of Sciences of the Czech Republic provides access to digitized documents strictly for personal use. Each copy of any part of this document must contain these Terms of use. This paper has been digitized, optimized for electronic delivery and stamped with digital signature within the project DML-CZ: The Czech Digital Mathematics Library http://project.dml.cz