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Preserving σ-ideals

Published online by Cambridge University Press:  12 March 2014

Jindřich Zapletal
Jindřich Zapletal*
Affiliation:
Division of Mathematics and Astronomy, California Institute of Technology, Pasadena. CA 91125, USA. E-mail: [email protected]
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Abstract

It is proved consistent that there be a proper σ-ideal on ω1 and an ℵ1-preserving poset ℙ such that ℙ ⊩ the σ-ideal generated by is not proper.

Type
Research Article
Information
The Journal of Symbolic Logic , Volume 63 , Issue 4 , December 1998 , pp. 1437 - 1441
Copyright
Copyright © Association for Symbolic Logic 1998

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References

REFERENCES

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