Results 61 to 70 of about 14,642,230 (161)

On the Definition of C*-algebras

open access: yesPublications of the Research Institute for Mathematical Sciences, 1973
It is shown that conditions \Vert x y\Vert ≤ \Vert x\Vert \Vert y\Vert and \Vert x^*\Vert= \Vert x\Vert follow from the other axioms for
Huzihiro Araki, George A. Elliott
openaire   +3 more sources

MARTApp: software for the processing and reconstruction of synchrotron‐radiation‐based magnetic tomographies

open access: yesJournal of Synchrotron Radiation, Volume 32, Issue 4, Page 1095-1104, July 2025.
MARTApp is an open‐source software for magnetic vector reconstruction of the data acquired from magnetic transmission X‐ray microscopy. It automates the tasks of image normalization, alignment, computation of magnetic signal and the reconstruction of quasi‐2D and ‐3D systems.
A. Estela Herguedas-Alonso   +6 more
wiley   +1 more source

A method for constructing idempotents in a unital algebra

open access: yesУчёные записки Казанского университета: Серия Физико-математические науки
A method is proposed for constructing idempotents in a unital algebra 𝒜 using n arbitrary idempotents P1,...,Pn from this algebra. The properties of the resulting idempotents P = P(P1,...,Pn) are investigated; for n = 2 and n = 3, explicit forms of the ...
M. Khadour
doaj   +1 more source

On Gradings of the Operator Algebra Generated by Mapping and Multipliers [PDF]

open access: yesУчёные записки Казанского университета: Серия Физико-математические науки, 2015
The operator algebra generated by mapping on a countable set and multipliers is considered. The defined mapping induces a family of partial isometries satisfying some relations.
E.V. Patrin
doaj  

Linearization routines for the parameter space concept to determine crystal structures without Fourier inversion

open access: yesJournal of Applied Crystallography, Volume 58, Issue 3, Page 768-788, June 2025.
Novel linearization routines within the parameter space concept (PSC) provide an alternative approach to determine one‐dimensionally projected crystal structures from a few diffraction intensities of standard Bragg reflections, represented by piecewise analytic hyper‐surfaces, without the use of Fourier inversion.
Muthu Vallinayagam   +3 more
wiley   +1 more source

On the derived category of an algebra over an operad. [PDF]

open access: yes, 2009
Contains fulltext : 129001.pdf (author's version ) (Open ...
Sub Algebra,Geometry&Mathem. Logic begr.   +3 more
core   +1 more source

C∗-algebraic Gauss-Lucas Theorem and C∗-algebraic Sendov’s Conjecture

open access: yesVestnik KRAUNC: Fiziko-Matematičeskie Nauki
Building on a foundational result established by Robertson [Proc. Edinburgh Math. Soc., 1976], we develop a framework for differentiation of maps defined on specific classes of unital commutative C∗-algebras.
Krishna, K.M.
doaj   +1 more source

Angles in C*-algebras

open access: yes, 2005
In this work we characterise the C*-algebras A generated by projections with the property that every pair of projections in A has positive angle, as certain extensions of abelian algebras by algebras of compact operators. We show that this property is equivalent to a lattice theoretic property of projections and also to the property that the set of ...
Anoussis, M.   +2 more
openaire   +3 more sources

The in crystallo optical spectroscopy toolbox

open access: yesJournal of Applied Crystallography, Volume 58, Issue 3, Page 1068-1078, June 2025.
The rise of time‐resolved macromolecular crystallography has been accompanied by renewed interest in companion biophysical characterization methods applicable to molecules both in solution and in crystallo. Here, we present a workflow and a graphical interface for analysing spectroscopic data collected on macromolecular crystals.Over the past ten years,
Nicolas Caramello   +3 more
wiley   +1 more source

Relatively hyperbolic groups are C*-simple

open access: yes, 2006
We characterize relatively hyperbolic groups whose reduced C*-algebra is simple as those, which have no non-trivial finite normal ...
Arzhantseva, G.   +5 more
core   +1 more source

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