David Alan Walker (1928–2012)
نویسندگان
چکیده
منابع مشابه
David Chodounský Alan Dow Klaas Pieter Hart Harm
We show that the existence of a homeomorphism between ω∗ 0 and ω∗ 1 entails the existence of a non-trivial autohomeomorphism of ω∗ 0 . This answers Problem 441 in [7]. We also discuss the joint consistency of various consequences of ω∗ 0 and ω∗ 1
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Let S and T be commuting operators of type ! and type $ in a Banach space X . Then the pair has a joint holomorphic functional calculus in the sense that it is possible to de ne operators f(S; T ) in a consistent manner, when f is a suitable holomorphic function de ned on a product of sectors. In particular, this gives a way to de ne the sum S+T when !+$ < . We show that this operator is always...
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One of the many gifts from Alan to Set-theoretic Topology is the use of elementarity. For a while this was even known as “Dow’s method of elementary submodels”. But Alan would be, was, and still is the first to protest that the Löwenheim-Skolem theorem predates him by a few decades. We have for the longest time been familiar with recursive constructions where often beforehand a sequence of situ...
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ژورنال
عنوان ژورنال: Photosynthesis Research
سال: 2012
ISSN: 0166-8595,1573-5079
DOI: 10.1007/s11120-012-9744-7