Results 21 to 30 of about 82 (77)

The Elman‐Lam‐Krüskemper Theorem

open access: yesInternational Scholarly Research Notices, Volume 2011, Issue 1, 2011., 2011
For a (formally) real field K, the vanishing of a certain power of the fundamental ideal in the Witt ring of K(-1) implies that the same power of the fundamental ideal in the Witt ring of K is torsion free. The proof of this statement involves a fact on the structure of the torsion part of powers of the fundamental ideal in the Witt ring of K.
Karim Johannes Becher   +3 more
wiley   +1 more source

On the parameterized Tate construction

open access: yesJournal of Topology, Volume 18, Issue 1, March 2025.
Abstract We introduce and study a genuine equivariant refinement of the Tate construction associated to an extension Ĝ$\widehat{G}$ of a finite group G$G$ by a compact Lie group K$K$, which we call the parameterized Tate construction (−)tGK$(-)^{t_G K}$.
J. D. Quigley, Jay Shah
wiley   +1 more source

The compactificability classes of certain spaces

open access: yesInternational Journal of Mathematics and Mathematical Sciences, Volume 2006, Issue 1, 2006., 2006
We apply the theory of the mutual compactificability to some spaces, mostly derived from the real line. For example, any noncompact locally connected metrizable generalized continuum, the Tichonov cube without its zero point Iℵ0\{0}, as well as the Cantor discontinuum without its zero point Dℵ0\{0} are of the same class of mutual compactificability as ...
Martin Maria Kovár
wiley   +1 more source

The Interaction of Femtosecond Laser with Perovskites for Advanced Photonics

open access: yesAdvanced Photonics Research, Volume 5, Issue 11, November 2024.
Femtosecond laser processing of halide perovskites can realize high‐solution, arbitrary planar, and 3D micro/nano‐architecture at large‐scale with low‐cost. This review systematically summarizes the interaction of fs laser with perovskites, including the mechanisms, phenomena, and applications.
Beibei Xu   +6 more
wiley   +1 more source

On the existence of certainty equivalents of various relevant types

open access: yesJournal of Applied Mathematics, Volume 2003, Issue 9, Page 447-458, 2003., 2003
We tackle the problem of associating certainty equivalents with preferences over stochastic situations, which arises in a number of different fields (e.g., the theory of risk attitudes or the analysis of stochastic cooperative games). We study the possibility of endowing such preferences with certainty equivalence functionals that satisfy relevant ...
J. C. R. Alcantud, G. Bosi
wiley   +1 more source

Separation axioms in topological preordered spaces and the existence of continuous order-preserving functions

open access: yesApplied General Topology, 2000
We characterize the existence of a real continuous order-preserving function on a topological preordered space, under the hypotheses that the topological space is normal and the preorder satisfies a strong continuity assumption, called IC-continuity. Under the same continuity assumption concerning the preorder, we present a sufficient condition for the
BOSI, GIANNI, ISLER, ROMANO
openaire   +6 more sources

Evolution of the Deformation‐ and Flow‐Induced Crystallization and Characterization of the Microstructure of a Single Spherulite, Lamella, and Chain of Isotactic Polypropylene

open access: yesMacromolecular Chemistry and Physics, Volume 225, Issue 2, January 2024.
Isotactic polypropylene is one of the most frequently used polymers in industrial processing and scientific research. The review is focused on semicrystalline character of isotactic polypropylene under deformation and various processes and deformation stages due to crystalline morphology changes.
Mohammed A. Sharaf, Andrzej Kloczkowski
wiley   +1 more source

Fuzzy neighborhood structures on partially ordered groups

open access: yesInternational Journal of Mathematics and Mathematical Sciences, Volume 31, Issue 6, Page 359-365, 2002., 2002
Ahsanullah (1988) showed the compatibility between group structures and I‐fuzzy neighborhood systems. In this paper, we require not only that the I‐fuzzy neighborhood systems be compatible with the group structures, but also compatible with the order relation, in one sense or another.
Kamel El-Saady, M. Y. Bakier
wiley   +1 more source

A (co)homology theory for some preordered topological spaces

open access: yes, 2020
The aim of this short note is to develop a (co)homology theory for topological spaces together with the specialisation preorder. A known way to construct such a (co)homology is to define a partial order on the topological space starting from the preorder, and then to consider some (co)homology for the obtained poset; however, we will prove that every ...
openaire   +2 more sources

Function Spaces, Hyperspaces, and Asymmetric and Fuzzy Structures

open access: yes, 2013
Journal of Function Spaces, Volume 2013, Issue 1, 2013.
Salvador Romaguera   +2 more
wiley   +1 more source

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