15 citations · 15 across the 1 of their papers we have counts for
4 papers
Winning the pressing down game but not Banach Mazur
Jakob Kellner, Matti Pauna, Saharon Shelah
Let be the set of those that have cofinality . It is consistent relative to a measurable that the nonempty player wins the pressing down game of length , bu…
Preserving Preservation
Jakob Kellner, Saharon Shelah
We present preservation theorems for countable support iteration of nep forcing notions satisfying ``old reals are not Lebesgue null'' and ``old reals are not meager''. (Nep is a g…
Preserving Non-Null with Suslin+ forcing
Jakob Kellner
We introduce the notion of effective Axiom A and use it to show that some popular tree forcings are Suslin+. We introduce transitive nep and present a simplified version of Shelah'…
F-Products and Nonstandard Hulls for Strongly Continuous One-parameter Semigroups of Linear Operators
Jakob Kellner, Hans Ploss
We give an overview of the F-product construction and the corresponding nonstandard constructions for strongly continuous one-parameter semigroups of linear operators, and show tha…