منابع مشابه
Small Valdivia Compact Spaces
We prove a preservation theorem for the class of Valdivia compact spaces, which involves inverse sequences of “simple” retractions. Consequently, a compact space of weight 6 א1 is Valdivia compact iff it is the limit of an inverse sequence of metric compacta whose bonding maps are retractions. As a corollary, we show that the class of Valdivia compacta of weight 6 א1 is preserved both under ret...
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A project of an expedition towards planet Venus, which is carried out in two stages, is considered. At the first stage, a space train, consisting of a locomotive and a tank with working substance, delivers onto Venus orbit the landing capsule with the Venus plane and the Venus rover, as well as the tank-container with liquid hydrogen, which is used subsequently for return of the expedition onto...
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I ntracellular pathogens are capable of profoundly altering the biology of their host cell. For example, the bacterium Chlamydia trachomatis (the causative agent of a common sexually transmitted disease in humans) secretes proteins that transform a host cell vacuole into a protected enclave for bacterial reproduction. Raphael Valdivia is fascinated by how Chlamydia manages this makeover (1) and...
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BACKGROUND This article describes the digitization of a series of historical datasets based οn the reports of the 1908-1910 Danish Oceanographical Expeditions to the Mediterranean and adjacent seas. All station and sampling metadata as well as biodiversity data regarding calcareous rhodophytes, pelagic polychaetes, and fish (families Engraulidae and Clupeidae) obtained during these expeditions ...
متن کاملAutomorphisms in Spaces of Continuous Functions on Valdivia Compacta
We show that there are no automorphic Banach spaces of the form C(K) with K continuous image of Valdivia compact except the spaces c0(Γ). Nevertheless, when K is an Eberlein compact of finite height such that C(K) is not isomorphic to c0(Γ), all isomorphism between subspaces of C(K) of size less than אω extend to automorphisms of C(K).
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ژورنال
عنوان ژورنال: The Geographical Journal
سال: 1901
ISSN: 0016-7398
DOI: 10.2307/1775343