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JSYML
2008
78views more  JSYML 2008»
13 years 5 months ago
Hierarchies of forcing axioms I
Abstract. We prove new upper bound theorems on the consistency strengths of SPFA(), SPFA(-linked) and SPFA(+ -cc). Our results are in terms of (, )-subcompactness, which is a new l...
Itay Neeman, Ernest Schimmerling
JSYML
2008
63views more  JSYML 2008»
13 years 5 months ago
Classifying model-theoretic properties
In 2004 Csima, Hirschfeldt, Knight, and Soare [1] showed that a set A T 0 is nonlow2 if and only if A is prime bounding, i.e. for every complete atomic decidable theory T , there i...
Chris J. Conidis
JSYML
2008
72views more  JSYML 2008»
13 years 5 months ago
Perfect trees and elementary embeddings
An important technique in large cardinal set theory is that of extending an elementary embedding j : M N between inner models to an elementary embedding j : M[G] N[G] between ge...
Sy-David Friedman, Katherine Thompson
JSYML
2008
74views more  JSYML 2008»
13 years 5 months ago
Omitting types for finite variable fragments and complete representations of algebras
. We give a novel application of algebraic logic to first order logic. A new, flexible construction is presented for representable but not completely representable atomic relation ...
Tarek Sayed Ahmed, Hajnal Andréka, Istv&aac...
JSYML
2008
66views more  JSYML 2008»
13 years 5 months ago
Special groups whose isometry relation is a finite union of cosets
0-stable 0-categorical linked quaternionic mappings are studied and are shown to correspond (in some sense) to special groups which are 0stable, 0-categorical, satisfy AP(3) and ha...
Vincent Astier