HIERARCHIES OF (VIRTUAL) RESURRECTION AXIOMS
@article{Fuchs2018HIERARCHIESO, title={HIERARCHIES OF (VIRTUAL) RESURRECTION AXIOMS}, author={Gunter Fuchs}, journal={The Journal of Symbolic Logic}, year={2018}, volume={83}, pages={283 - 325} }
Abstract I analyze the hierarchies of the bounded resurrection axioms and their “virtual” versions, the virtual bounded resurrection axioms, for several classes of forcings (the emphasis being on the subcomplete forcings). I analyze these axioms in terms of implications and consistency strengths. For the virtual hierarchies, I provide level-by-level equiconsistencies with an appropriate hierarchy of virtual partially super-extendible cardinals. I show that the boldface resurrection axioms for…
6 Citations
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References
SHOWING 1-10 OF 59 REFERENCES
ON RESURRECTION AXIOMS
- PhilosophyThe Journal of Symbolic Logic
- 2015
A stronger form of resurrection is introduced and it is shown that it gives rise to families of axioms which are consistent relative to extendible cardinals, and which imply the strongest known instances of forcing axiomatic, such as Martin’s Maximum++.
HIERARCHIES OF FORCING AXIOMS, THE CONTINUUM HYPOTHESIS AND SQUARE PRINCIPLES
- EconomicsThe Journal of Symbolic Logic
- 2018
It is shown that the subcomplete forcing axiom implies Larson’s ordinal reflection principle at ω 2, and that its effect on the failure of weak squares is very similar to that of Martin's Maximum.
Resurrection axioms and uplifting cardinals
- EconomicsArch. Math. Log.
- 2014
The resurrection axioms are introduced and the uplifting cardinals are proved to be a new large cardinal notion and it is proved that various instances of the resurrection axIoms are equiconsistent over ZFC with the existence of an uplifting cardinal.
On Subcomplete Forcing
- Environmental Science
- 2017
I survey an array of topics in set theory in the context of a novel class of forcing notions: subcomplete forcing. Subcompleteness was originally defined by Ronald Jensen. I have attempted to make…
Strongly uplifting cardinals and the boldface resurrection axioms
- PhilosophyArch. Math. Log.
- 2017
The strongly uplifting cardinals are introduced, and it is shown that their existence is equiconsistent over ZFC with natural instances of the boldface resurrection axiom, such as theboldface resurrected axiom for proper forcing.
Bounded forcing axioms as principles of generic absoluteness
- PhilosophyArch. Math. Log.
- 2000
It is shown that Bounded Forcing Axioms imply a strong form of generic absoluteness for projective sentences, namely, if a $\Sigma^1_3$ sentence with parameters is forceable, then it is true.
Subcomplete Forcing and L-Forcing
- Environmental Science
- 2012
ABSRACT In his book Proper Forcing (1982) Shelah introduced three classes of forcings (complete, proper, and semi-proper) and proved a strong iteration theorem for each of them: The first two are…
The Bounded Proper Forcing Axiom
- MathematicsJ. Symb. Log.
- 1995
The bounded proper forcing axiom BPFA is equivalent to the statement that two nonisomorphic models of size @1 cannot be made isomorphic by a proper forcing notion, and the consistency strength of the bounded properforcing axiom is exactly the existence of a §1-re∞ecting cardinal.
Subtle and Ineffable Tree Properties
- Mathematics
- 2010
In the style of the tree property, we give combinatorial principles that capture the concepts of the so-called subtle and ineffable cardinals in such a way that they are also applicable to small…
Closed maximality principles: implications, separations and combinations
- MathematicsJournal of Symbolic Logic
- 2008
An application to the automorphism tower problem is given, showing that there are Souslin trees which are able to realize any equivalence relation, and hence thatthere are groups whose automorphic tower is highly sensitive to forcing.