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Found 37 Documents (Results 1–37)

Ultrafilter semirings and nonstandard submodels of the Stone-Čech compactification of the natural numbers. (English) Zbl 1079.16036

Blass, Andreas (ed.) et al., Logic and its applications. Result of the conference on logic and its applications in algebra and geometry, Ann Arbor, MI, USA, April 11–13, 2003 and the workshop on combinatorial set theory, excellent classes, and Schanuel conjecture, Ann Arbor, MI, USA, April 14–15, 2003. Providence, RI: American Mathematical Society (AMS) (ISBN 0-8218-3474-6/pbk). Contemporary Mathematics 380, 45-51 (2005).
MSC:  16Y60 03H15 54D80

Several proofs of PA-unprovability. (English) Zbl 1084.03045

Blass, Andreas (ed.) et al., Logic and its applications. Result of the conference on logic and its applications in algebra and geometry, Ann Arbor, MI, USA, April 11–13, 2003 and the workshop on combinatorial set theory, excellent classes, and Schanuel conjecture, Ann Arbor, MI, USA, April 14–15, 2003. Providence, RI: American Mathematical Society (AMS) (ISBN 0-8218-3474-6/pbk). Contemporary Mathematics 380, 29-43 (2005).
MSC:  03F30 03H15 03C98

Nonstandard free objects over pseudovarieties of finite algebraic systems. (English) Zbl 1083.03057

Chajda, I. (ed.) et al., Proceedings of the 68th workshop on general algebra “68. Arbeitstagung Allgemeine Algebra”, Dresden, Germany, June 10–13, 2004 and of the summer school 2004 on general algebra and ordered sets, Malá Morávka, Czech Republic, September 5–11, 2004. Klagenfurt: Verlag Johannes Heyn (ISBN 3-7084-0163-8/pbk). Contributions to General Algebra 16, 145-154 (2005).

Sequences of degrees associated with models of arithmetic. (English) Zbl 1081.03069

Baaz, Matthias (ed.) et al., Logic colloquium ’01. Proceedings of the annual European summer meeting of the Association for Symbolic Logic (ASL), Vienna, Austria, August 6–11, 2001. Wellesley, MA: A K Peters; Urbana, IL: Association for Symbolic Logic (ISBN 1-56881-247-7/hbk; 1-56881-248-5/pbk). Lecture Notes in Logic 20, 217-241 (2005).
MSC:  03H15 03D28

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