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Core models with more Woodin cardinals

Published online by Cambridge University Press:  12 March 2014

J. R. Steel
J. R. Steel*
Affiliation:
Department of Mathematics, The University of California, 717 Evans Hall # 3840, Berkeley. CA 94720-3840, USA, E-mail: [email protected]
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Extract

In this paper, we shall prove two theorems involving the construction of core models with infinitely many Woodin cardinals. We assume familiarity with [12], which develops core model theory the one Woodin level, and with [10] and [6], which extend the fine structure theory of [5] to mice having many Woodin cardinals. The most important new problem of a general nature which we must face here concerns the iterability of Kc with respect to uncountable iteration trees.

Our first result is the following theorem, a slightly stronger version of which was proved independently and earlier by Woodin. The theorem settles positively a conjecture of Feng, Magidor, and Woodin [2].

Theorem. Let Ω be measurable. Then the following are equivalent:

(a) for all posets,

(b) for every poset,

(c) for every poset ℙ ∈ VΩ, Vℙ ⊨ there is no uncountable sequence of distinct reals in L(ℝ)

(d) there is an Ω-iterable premouse of height Ω which satisfies “there are infinitely many Woodin cardinals”.

It is an immediate corollary that if every set of reals in L(ℝ) is weakly homogeneous, then ADL(ℝ) holds. We shall also indicate some extensions of the theorem to pointclasses beyond L(ℝ), and mice with more than ω Woodin cardinals.

Type
Research Article
Information
The Journal of Symbolic Logic , Volume 67 , Issue 3 , September 2002 , pp. 1197 - 1226
Copyright
Copyright © Association for Symbolic Logic 2002

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References

REFERENCES

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