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Increasing δ21 and Namba-style forcing

Published online by Cambridge University Press:  12 March 2014

Richard Ketchersid ,
Paul Larson  and
Jindřich Zapletal
Richard Ketchersid
Affiliation:
Department of Mathematics & Statistics, Miami University, Oxford, OH 45056, USA. E-mail: [email protected]
Paul Larson
Affiliation:
Department of Mathematics & Statistics, Miami University, Oxford, OH 45056, USA. E-mail: [email protected]
Jindřich Zapletal
Affiliation:
Department of Mathematics, University of Florida, 358 Little Hall, P.O. Box 118105, Gainesville, FL 32611-8105, USA. E-mail: [email protected]
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Abstract

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

Type
Research Article
Information
The Journal of Symbolic Logic , Volume 72 , Issue 4 , December 2007 , pp. 1372 - 1378
Copyright
Copyright © Association for Symbolic Logic 2007

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References

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