نتایج جستجو برای: ultrafilter
تعداد نتایج: 382 فیلتر نتایج به سال:
BACKGROUND Patients on standard dialysis, in particular those on high-flux and high-efficiency dialysis, are exposed to hundreds of liters of dialysis-water per week. The quality of dialysis-water is a factor responsible for inflammation in dialysis patients. Inflammation is a potent trigger of atherosclerosis and a pathogenetic factor in anemia, increasing mortality and morbidity in dialysis p...
We find many conditions equivalent to the modeltheoretical property λ κ ⇒ μ introduced in [L1]. Our conditions involve uniformity of ultrafilters, compactness properties of products of topological spaces and the existence of certain infinite matrices. See Part I [L7] or [CN, CK, KM, KV, HNV] for unexplained notation. According to [L1], if λ ≥ μ are infinite regular cardinals, and κ is a cardina...
We prove that every MAD family can be destroyed by a proper forcing preserves P -points. With this result, we it is consistent ω 1 = u < , solving nearly 20 year old problem of Shelah, and Brendle. will also present simple proof result Blass Shelah the inequality s consistent.
In this note we present a characterisation of exponentiable approach spaces in terms of ultrafilter convergence.
We show the consistency of ZFC + ”there is no NWD-ultrafilter on ω”, which means: for every non-principal ultrafilter D on the set of natural numbers, there is a function f from the set of natural numbers to the reals, such that for every nowhere dense set A of reals, {n : f(n) ∈ A} / ∈ D. This answers a question of van Douwen, which was put in more general context by Baumgartner. ∗ The researc...
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