We prove that if GCH holds and τ = κα : α < η is a sequence of infinite cardinals such that κα ≥ |η| for each α < η, then there is a cardinal-preserving partial order that forces the existence of a scattered Boolean space whose cardinal sequence is τ .
✦ LIBER ✦
On cardinal sequences of scattered spaces
✍ Scribed by Juan Carlos Martínez
- Publisher
- Elsevier Science
- Year
- 1998
- Tongue
- English
- Weight
- 741 KB
- Volume
- 90
- Category
- Article
- ISSN
- 0166-8641
No coin nor oath required. For personal study only.
✦ Synopsis
It was proved by Dow and Simon that there are 2"' (as many as possible) pairwise nonhomeomorphic compact, T2, scattered spaces of height WI and width w. In this paper, we prove that if cy is an ordinal with WI < 01 < w2 and 19 = (KC: [ < cx) is a sequence of cardinals such that either KC = w or KC = WI for every [ < cr, then there are 2"' pairwise nonhomeomorphic compact, T2, scattered spaces whose cardinal sequence is 6'.
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