Supercompact cardinal;
Measurable cardinal;
Normal measure;
Indestructibility;
03E35;
03E55;
D O I:
暂无
中图分类号:
学科分类号:
摘要:
If κ < λ are such that κ is indestructibly supercompact and λ is measurable, then we show that both A = {δ < κ | δ is a measurable cardinal which is not a limit of measurable cardinals and δ carries the maximal number of normal measures} and B = {δ < κ | δ is a measurable cardinal which is not a limit of measurable cardinals and δ carries fewer than the maximal number of normal measures} are unbounded in κ. The two aforementioned phenomena, however, need not occur in a universe with an indestructibly supercompact cardinal and sufficiently few large cardinals. In particular, we show how to construct a model with an indestructibly supercompact cardinal κ in which if δ < κ is a measurable cardinal which is not a limit of measurable cardinals, then δ must carry fewer than the maximal number of normal measures. We also, however, show how to construct a model with an indestructibly supercompact cardinal κ in which if δ < κ is a measurable cardinal which is not a limit of measurable cardinals, then δ must carry the maximal number of normal measures. If we weaken the requirements on indestructibility, then this last result can be improved to obtain a model with an indestructibly supercompact cardinal κ in which every measurable cardinal δ < κ carries the maximal number of normal measures.
机构:
CUNY, Baruch Coll, Dept Math, New York, NY 10010 USA
CUNY, Grad Ctr, Dept Math, New York, NY 10016 USACUNY, Baruch Coll, Dept Math, New York, NY 10010 USA
机构:
CUNY, Baruch Coll, Dept Math, New York, NY 10010 USA
CUNY, Grad Ctr, Math, 365 Fifth Ave, New York, NY 10016 USACUNY, Baruch Coll, Dept Math, New York, NY 10010 USA
机构:
CUNY, Baruch Coll, Dept Math, New York, NY 10010 USA
CUNY, Grad Ctr, Dept Math, 365 Fifth Ave, New York, NY 10016 USACUNY, Baruch Coll, Dept Math, New York, NY 10010 USA