Journal of Symbolic Logic

Increasing δ12 and Namba-style forcing

Richard Ketchersid, Paul Larson, and Jindřich Zapletal

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Abstract

We isolate a forcing which increases the value of δ12 while preserving ω₁ under the assumption that there is a precipitous ideal on ω₁ and a measurable cardinal.

Article information

Source
J. Symbolic Logic Volume 72, Issue 4 (2007), 1372-1378.

Dates
First available in Project Euclid: 18 February 2008

Permanent link to this document
http://projecteuclid.org/euclid.jsl/1203350792

Digital Object Identifier
doi:10.2178/jsl/1203350792

Mathematical Reviews number (MathSciNet)
MR2371211

Zentralblatt MATH identifier
1139.03040

Subjects
Primary: 03E40: Other aspects of forcing and Boolean-valued models

Citation

Ketchersid, Richard; Larson, Paul; Zapletal, Jindřich. Increasing δ 1 2 and Namba-style forcing. J. Symbolic Logic 72 (2007), no. 4, 1372--1378. doi:10.2178/jsl/1203350792. http://projecteuclid.org/euclid.jsl/1203350792.


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