A Note on a Result of Kunen and Pelletier
Barbanel, Julius B.
J. Symbolic Logic, Tome 57 (1992) no. 1, p. 461-465 / Harvested from Project Euclid
Suppose that $U$ and $U'$ are normal ultrafilters associated with some supercompact cardinal. How may we compare $U$ and $U'$? In what ways are they similar, and in what ways are they different? Partial answers are given in [1], [2], [3], [5], [6], and [7]. In this paper, we continue this study. In [6], Menas introduced a combinatorial principle $\chi(U)$ of normal ultrafilters $U$ associated with supercompact cardinals, and showed that normal ultrafilters satisfying this property also satisfying this property also satisfy a partition property. In [5], Kunen and Pelletier showed that this partition property for $U$ does not imply $\chi (U)$. Using results from [3], we present a different method of finding such normal ultrafilters which satisfy the partition property but do not satisfy $\chi (U)$. Our method yields a large collection of such normal ultrafilters.
Publié le : 1992-06-14
Classification: 
@article{1183743966,
     author = {Barbanel, Julius B.},
     title = {A Note on a Result of Kunen and Pelletier},
     journal = {J. Symbolic Logic},
     volume = {57},
     number = {1},
     year = {1992},
     pages = { 461-465},
     language = {en},
     url = {http://dml.mathdoc.fr/item/1183743966}
}
Barbanel, Julius B. A Note on a Result of Kunen and Pelletier. J. Symbolic Logic, Tome 57 (1992) no. 1, pp.  461-465. http://gdmltest.u-ga.fr/item/1183743966/