Wide Gaps with Short Extenders
نویسنده
چکیده
The paper is a continuation of [Gi]. Extending the methods of [Gi] we show the following: Let κ = ⋃ n<ω κn, κ0 < κ1 < · · · < κn < · · · (1) if each κn carries an extender of the length of the first Mahlo above κn, then for every λ > κ there is a generic extension satisfying 2 ≥ λ; (2) if each κn carries an extender of the length of the first fixed point of the א-function above κn of order n, then for every λ, κ < λ < least inaccessible above κ there is a generic extension satisfying 2 ≥ λ.
منابع مشابه
Blowing up Power of a Singular Cardinal –wider Gaps
The paper is concerned with methods for blowing power of singular cardinals using short extenders. Thus, for example, starting with κ of cofinality ω with {α < κ | o(α) ≥ α+n} cofinal in κ for every n < ω we construct a cardinal preserving extension having the same bounded subsets of κ and satisfying 2κ = κ+δ+1 for any δ < א1.
متن کاملSimpler Short Extenders Forcing - arbitrary gap
Our aim is to present a version of short extenders forcing which splits between cardinals above and below the critical cardinal and allows to blow up the power arbitrary higher. 1 The Main Preparation Forcing The definition of the forcing below follows the ideas of [1], [2], [3], [4]. We extend the method of [4] to gaps up to κ. The forcing adds a certain kind of a simplified morass with linear...
متن کاملSimpler Short Extenders Forcing - arbitrary gap ( January
Our aim is to present a version of short extenders forcing which splits between cardinals above and below the critical cardinal and allows to blow up the power arbitrary higher. 1 The Main Preparation Forcing The definition of the forcing below follows the ideas of [1], [2], [3], [4]. We extend the method of [4] to gaps up to κ. The forcing adds a certain kind of a simplified morass with linear...
متن کاملCombining Short extenders forcings with Extender based Prikry
Change first the cofinality of κ to ω by adding a Prikry sequence ⟨κn | n < ω⟩ such that each κn is κ +n+2 n –strong. Then use the short extenders forcing which adds κ +ω+2 many cofinal ω-sequences to κ (after the preparation or simultaneously with it). All cardinals will be preserved then. If one does not care about falling of κ, then preform Gap 2 short extenders forcing. As a result κ will t...
متن کاملFluorescent multiple staining and CASA system to assess boar sperm viability and membranes integrity in short and long-term extenders
The aim of this study was to assess the effect on boar spermatozoa quality of in vitro storage in short and long-term extenders by fluorescent multiple staining (FMS) and computer assisted semen analyzer (CASA). Fresh ejaculates from three healthy, sexually mature boars were diluted with equal volumes of six short-term or three long-term commercial extenders and stored at 19°C for 6 days (short...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره شماره
صفحات -
تاریخ انتشار 2008