Luzin gaps
نویسندگان
چکیده
منابع مشابه
Luzin Gaps
We isolate a class of Fσδ ideals on N that includes all analytic P-ideals and all Fσ ideals, and introduce ‘Luzin gaps’ in their quotients. A dichotomy for Luzin gaps allows us to freeze gaps, and prove some gap preservation results. Most importantly, under PFA all isomorphisms between quotient algebras over these ideals have continuous liftings. This gives a partial confirmation to the author’...
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ژورنال
عنوان ژورنال: Transactions of the American Mathematical Society
سال: 2004
ISSN: 0002-9947,1088-6850
DOI: 10.1090/s0002-9947-04-03565-2