منابع مشابه
Many countable support iterations of proper forcings preserve Souslin trees
We show that many countable support iterations of proper forcings preserve Souslin trees. We establish sufficient conditions in terms of games and we draw connections to other preservation properties. We present a proof of preservation properties in countable support iterations in the so-called Case A that does not need a division into forcings that add reals and those who do not.
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We prove that the PFA lottery preparation of a strongly unfoldable cardinal κ under ¬0 forces PFA(א2-preserving), PFA(א3-preserving) and PFAא2 , with 2 ω = κ = א2. The method adapts to semi-proper forcing, giving SPFA(א2-preserving), SPFA(א3-preserving) and SPFAא2 from the same hypothesis. It follows by a result of Miyamoto that the existence of a strongly unfoldable cardinal is equiconsistent ...
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1. Levin DN, Hu X, Tan KT, et al. The brain: integrated three-dimensional display of MR and PET images. Radiology 1989;172:783– 789 2. Pelizzari CA, Chen GTY, Spelbring DR, et al. Accurate threedimensional registration of CT, PET, and/or MR images of the brain. J Comput Assist Tomogr 1989;13:20–26 3. Peters TM, Clark JA, Olivier A, et al. Integrated stereotaxic imaging with CT, MR imaging, and ...
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A trip-let is an object as shown on the cover of Hofstadter’s book Gödel, Escher, Bach: a solid, threedimensional object that, when viewed from three orthogonal directions, shows three different letters. In this paper we consider two problems related to the construction of such objects for a given set of three letters. First, we want to know whether the silhouettes of the object correspond to t...
متن کاملOn Desugaring Polymorphic Lets
Existing type literature has conflicting views on desugaring polymorphic lets to lambda terms. The conflict arises because, in certain cases, desugaring does not preserve typing. We describe a transformation of polymorphic lets to monomorphic lets such that, when the monomorphic lets are desugared, the typing is preserved. Our transformation requires no changes to either term or type syntax. Th...
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ژورنال
عنوان ژورنال: Journal of Proteome Research
سال: 2005
ISSN: 1535-3893,1535-3907
DOI: 10.1021/pr050503+