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排序方式: 共有74条查询结果,搜索用时 781 毫秒
1.
Attapol Kaewkhao 《Journal of Mathematical Analysis and Applications》2007,333(2):950-958
We give some sufficient conditions for the Domínguez-Lorenzo condition in terms of the James constant, the Jordan-von Neumann constant, and the coefficient of weak orthogonality. As a consequence, we obtain fixed point theorems for multivalued nonexpansive mappings. 相似文献
2.
Those who have worked in the Royal Institution of Great Britain have, since its foundation in 1799, made significant contributions
to scientific knowledge, to its practical application, and to its communication to a wide variety of audiences. Such work
cannot be carried out in an architectural vacuum, and in this paper we examine how the buildings of the Royal Institution,
20 and 21 Albemarle Street in central London, have shaped the work undertaken within its walls and how, on a number of occasions,
the buildings have been reconfigured to take account of the evolving needs of scientific research and communication.
This paper is based on the Conservation Plan of the Royal Institution that we wrote during 2003. The Conservation Plan did
not examine the land owned by the Royal Institution to the north (i.e., 22 and 23 Albemarle Street; for this area see Richard Garnier, “Grafton Street, Mayfair,” Georgian Group Journal 13 (2003), 210–272), but it did discuss 18 and 19 Albemarle Street. In this paper we concentrate on the core Royal Institution
buildings at 20 and 21 Albemarle Street. Other studies of the relationship of architecture,space, and science include Crosbie
Smith and Jon Agar, ed., Making Space for Science: Territorial Themes in the Shaping of Knowledge (Basingstoke: Macmillan, 1997); Peter Galison and Emily Thompson, ed., The Architecture of Science (Cambridge, Mass.: MIT Press, 1999); and Sophie Forgan,“The architecture of science and the idea of a university,” Studies in History and Philosophy of Science 20 (1989), 405–434.
Frank A.J.L. James is Professor of the History of Science at the Royal Institution; he has written widely on the history of
nineteenth-century science in its social and cultural contexts and is editor of the Correspondence of Michael Faraday. He is President of the British Society for the History of Science. Anthony Peers is an Associate of Rodney Melville and
Partners where he works in the field of building conservation as an architectural historian. He is a Council member of the
Ancient Monument Society. 相似文献
3.
Physicist Lee A. DuBridge became president of the California Institute of Technology in 1946. In this
interview he recalls his dealings at Caltech with Linus Pauling; his memories of George W. Beadle,
Theodore von Kármán, and J. Robert Oppenheimer; the military Vista Project at Caltech; and the
difficulties surrounding the deportation of Hsue-Shen Tsien, Caltech's Goddard Professor of Jet
Propulsion. 相似文献
4.
Eva M. Mazcuñán-Navarro 《Journal of Mathematical Analysis and Applications》2008,337(1):197-218
In this paper we establish lower bounds for the weakly convergent sequence coefficient WCS(X) of a Banach space X, in terms of some well known moduli and coefficients. By mean of these bounds we identify several properties, of geometrical nature, which imply normal structure. We show that these properties are strictly more general than other previously known sufficient conditions for normal structure. 相似文献
5.
It is proved that every subspace of James Tree space (JT) with non-separable dual contains an isomorph of James Tree complemented in JT. This yields that every complemented subspace of JT with non-separable dual is isomorphic to JT. A new JT like space denoted as TF is defined. It is shown that every subspace of James Function space (JF) with non-separable dual contains an isomorph of TF. The later yields that every subspace of JF with non-separable dual contains isomorphs of c0 and ?p for 2?p<∞. The analogues of the above results for bounded linear operators are also proved. 相似文献
6.
Chan He 《Journal of Mathematical Analysis and Applications》2007,329(2):1260-1272
In this paper, some properties concerning Milman's moduli J(t,X) and S(t,X), including equivalent representations, upper and lower bounds as well as relationship between some geometric properties and these two moduli, are studied. In addition, some sufficient conditions for the fixed point property are presented. 相似文献
7.
Qiqing Yu George Y. C. Wong Menggang Yu 《Annals of the Institute of Statistical Mathematics》2007,59(4):675-695
We consider the estimation problem with classical case-cohort data. The case-cohort design was first proposed by Prentice
(Biometrics 73:1–11, 1986). Most studies focus on the Cox regression model. In this paper, we consider the linear regression
model. We propose an estimator which extends the Buckley–James estimator to the classical case-cohort design. In order to
derive the BJE, there is an additional problem of finding the generalized maximum likelihood estimator (GMLE) of the underlying
distribution functions. We propose a self-consistent algorithm for the GMLE. We also justify that the GMLE is consistent and
asymptotically normally distributed under certain regularity conditions. We further present some simulation results on the
asymptotic properties of the BJE and apply our procedure to a data set used in the literature. 相似文献
8.
Sompong Dhompongsa Anchalee Kaewcharoen Attapol Kaewkhao 《Nonlinear Analysis: Theory, Methods & Applications》2006
Let E be a nonempty bounded closed convex separable subset of a reflexive Banach space X which satisfies the Domínguez–Lorenzo condition, i.e., an inequality concerning the asymptotic radius of a sequence and the Chebyshev radius of its asymptotic center. We prove that a multivalued nonexpansive mapping T:E→2X which is compact convex valued and such that T(E) is bounded and satisfies an inwardness condition has a fixed point. As a consequence, we obtain a fixed-point theorem for multivalued nonexpansive mappings in uniformly nonsquare Banach spaces which satisfy the property WORTH, extending a known result for the case of nonexpansive single-valued mappings. We also prove a common fixed point theorem for two nonexpansive commuting mappings t:E→E and T:E→KC(E) (where KC(E) denotes the class of all compact convex subsets of E) when X is a uniformly convex Banach space. 相似文献
9.
10.
The James constant for the <Emphasis Type="Italic">l</Emphasis><Subscript>3</Subscript> − <Emphasis Type="Italic">l</Emphasis><Subscript>1</Subscript> space 下载免费PDF全文
In this note, the exact value of the James constant for the l3-l1 space is obtained, J(l3-l1)=1.5573…. This result improves the known inequality, J(l3-l1)≤4/3√10, which was given by Dhompongsa, Piraisangjun and Saejung. 相似文献