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Norms on Possibilities II: More CCC Ideals on 2ω
1Institute of Mathematics, The Hebrew University of Jerusalem, 91904 Jerusalem, Israel and Mathematical Institute of Wroclaw University, Pl. Grunwaldzki 2/4, 50-384 Wroclaw, Poland. firstname.lastname@example.org
2Institute of Mathematics, The Hebrew University of Jerusalem, 91904 Jerusalem, Israel and Department of Mathematics, Rutgers University, New Brunswick, Nj 08854, USA. email@example.com
Citation Information: Journal of Applied Analysis. Volume 3, Issue 1, Pages 103–127, ISSN (Online) 1869-6082, ISSN (Print) 1425-6908, DOI: 10.1515/JAA.1997.103, June 2010
- Published Online:
We use the method of norms on possibilities to answer a question of Kunen and construct a ccc σ–ideal on 2ω with various closure properties and distinct from the ideal of null sets, the ideal of meager sets and their intersection.