Results 291 to 300 of about 14,465,781 (332)

TWISTED HILBERT SPACES AND UNCONDITIONAL STRUCTURE

Journal of the Institute of Mathematics of Jussieu, 2003
In the paper under review, it is proved that if a Banach space \(X\) with an unconditional basis has a subspace \(E\) such that both \(E\) and \(X/E\) are isomorphically Hilbertian, then \(X\) is also isomorphically Hilbertian. As is well known, for general Banach spaces this is not true; cf. \textit{P. Enflo, J. Lindenstrauss} and \textit{G.
openaire   +2 more sources

Ferroelectric twisted liquid crystal structure

Ferroelectrics, 1998
We propose here a new model of molecular distribution in a ferroelectric twisted liquid crystal sample. Whereas Pavel and Patel asserted that the electric field was homogeneous within the bulk, we have rather assumed than the high spontaneous polarisation of the SmC* phase induces a local polarisation charge in space, which destroys the homogeneity of ...
M. Guena, M. Le Gall, L. Dupont
openaire   +1 more source

Twisted structure preserved dinosaur proteins

Nature, 2011
Collagen coils might have kept Tyrannosaurus molecules safe from harm for millions of years.
openaire   +1 more source

Twisting procedure on torogonal structures

Journal of Geometry and Physics, 1994
Let \((E,Q)\) be a pseudo-Euclidean vector space and denote by \((E',Q')\) its complexification. The Clifford group \(\Gamma(Q')\) is the subgroup of the Clifford algebra \(C(Q')\) consisting of the elements \(g\) which satisfy \(\alpha(g)xg^{-1}\in E'\) for all \(x\in E'\): \[ 1\to C^*\to \Gamma(Q')@> p>> O(Q')\to 1. \] Denote by \(N: \Gamma(Q')\to C\)
openaire   +1 more source

Light with twist and structure

Science, 2015
Optics Mobius strips are three-dimensional structures consisting of a surface with just a single side. Readily demonstrated by snipping a paper ring, adding a twist, and then joining the ends of paper together again, these structures have intriguing mathematical properties in terms of topology and geometry. Bauer et al.
openaire   +1 more source

Spin structures with a twist

Physics World, 1990
Puzzling experimental results for the magnetization and magnetic phases of the rare-earth metal holmium, that have lingered unexplained for some 20 years, may now be understood following the discovery of a new type of magnetic structure by Jens Jensen and Allan Mackintosh at the University of Copenhagen, Denmark (1990 Phys. Rev. Lett. 64 2699).
openaire   +1 more source

Photonic Bandgap in Achiral Liquid Crystals—A Twist on a Twist

Advanced Materials, 2021
Damian Pociecha, Nataša Vaupotič, Magdalena Majewska   +2 more
exaly  

Liquid Crystal Elastomer Twist Fibers toward Rotating Microengines

Advanced Materials, 2022
Zhongqiang Yang
exaly  

Twist-structures semantics for the logics of the hierarchy InPk

J. Appl. Non Class. Logics, 2009
Fernando M. Ramos, Víctor L. Fernández
semanticscholar   +1 more source

Alternating twist structures formed by electroconvection in the nematic phase of an achiral bent-core molecule.

Physical review. E, Statistical, nonlinear, and soft matter physics, 2008
Shingo Tanaka, S. Dhara, B. K. Sadashiva, Yoshio Shimbo, Y. Takanishi, F. Araoka, K. Ishikawa, H. Takezoe   +7 more
semanticscholar   +1 more source