… Tukey order in the class of F ideals of subsets of . We show that no nontrivial F ideal is Tukey
below a G ideal … We introduce the notions of flat ideals and gradually flat ideals. We prove a …

… the Tukey order on certain ideals arising in measure theory [8]. Many of his ideals are …
We showed, among other things, that there is a 2 c -sized antichain in K ( M ) , and [ 0 , 1 ] ω …

… the Tukey order on certain ideals arising in measure theory [8]. Many of his ideals are …
We showed, among other things, that there is a 2c-sized antichain in K(M), and [0, 1]ω, with …

… We investigate Tukey functions from the ideal of all closed … that this ideal is not Tukey
reducible to the ideal of density zero … reductions among the five orders involved in it. A moment’s …

… type (that is, maximal among partial orders of size continuum… Tukey order, we also show
that there is an analytic P-ideal above all other analytic P-ideals in the weak Rudin–Keisler order…

… Moreover, if P ∩ Q = ∅, then we may assume the order … Moreover, since 〈[c]<ω, ⊆〉 is
Tukey-maximal among the … Let J be the ideal generated by the set of pseudointersections of …

… partially ordered sets are Tukey equivalent if and only if they are order isomorphic to cofinal
… a suitable notion of Tukey reduction that allows to compare such structures among them, and …

… a single degree of freedom contrast among the levels of the inde… Xn] and the ideal sequence
by [Y1, Y2 A convenient and … Results for the rank order case First we present in some …

… of serendipity, Tukey sought to discipline it in order to make it … of confidence and significance,
Tukey expresses a clear … Despite the fact that a good deal of Tukey's reputation among …

… In this paper, we investigate the relationship between the Tukey order and PCF theory, as
… We next define certain ideals which are naturally associated to the cardinals in pcf(A). A …