Results 91 to 100 of about 82,654 (305)

On the geometry of the unit ball of a C*- algebra.

open access: yesJournal für die reine und angewandte Mathematik (Crelles Journal), 1995
The paper attempts to extend notions and results for finite \(C^*\)- algebras to the infinite case by considering arbitrary extreme points of the unit ball instead of unitaries and, analogously, by considering quasi-invertibles, as defined in the paper, instead of invertibles.
Pedersen, Gert K., Brown, L.G.
openaire   +1 more source

In Situ Crystalline‐Amorphous Composite Oxide Structure Suppressing Thermal Wear Instability for Refractory Multi‐Principal Element Alloy

open access: yesAdvanced Functional Materials, EarlyView.
An effective strategy is developed to overcome the medium temperatures wear resistance degradation in refractory multi‐principal element alloys. By utilizing chemical short‐range ordering to trigger oxygen‐induced amorphization, a composite oxide structure is formed, which combines high hardness with robust stiffness.
Xuhui Pei   +7 more
wiley   +1 more source

单位球上βP空间到Zα型空间的加权Cesàro算子(Extended Cesàro operators from βP spaces to Zα spaces on the unit ball)

open access: yesZhejiang Daxue xuebao. Lixue ban, 2013
Boundary and compact of extended Cesàro operators from βP spaces to Zygmund type space in the unit ball are studied. With the methods of functional analysis and several complex variables, the necessary and sufficient conditions are given for extended ...
ZHAOYan-hui(赵艳辉)
doaj   +1 more source

Intersection properties of the unit ball [PDF]

open access: yes, 2019
Let $X$ be a real Banach space with the closed unit ball $B_X$ and the dual $X^{*}$. We say that $X$ has the {em intersection property} $I$ ({em general intersection property} $GI$, respectively) if, for each countable family (for each family ...
C. A. De Bernardi   +3 more
core   +1 more source

On hyperinterpolation on the unit ball

open access: yesJournal of Mathematical Analysis and Applications, 2013
Minor revisions were made in the introduction and the proof of the main ...
openaire   +2 more sources

Stable Unit Balls in Orlicz Spaces [PDF]

open access: yesProceedings of the American Mathematical Society, 1990
Let L ϕ
openaire   +1 more source

Ultrasmall High‐Entropy Materials: Nanoscale Effects, Synthesis, and Mechanistic Insights

open access: yesAdvanced Functional Materials, EarlyView.
This review article focuses on sub‐10 nm high‐entropy materials that combine nanoscale design with complex compositions for next‐generation applications. ABSTRACT Ultrasmall high‐entropy nanomaterials (USHENMs, <10 nm) merge multicomponent chemistry with size‐dependent effects, forming a distinct class of materials with unprecedented properties.
Yueyue He   +5 more
wiley   +1 more source

The Essential Norm of the Generalized Hankel Operators on the Bergman Space of the Unit Ball in Cn

open access: yesAbstract and Applied Analysis, 2010
In 1993, Peloso introduced a kind of operators on the Bergman space A2(B) of the unit ball that generalizes the classical Hankel operator. In this paper, we estimate the essential norm of the generalized Hankel operators on the Bergman space Ap(B)  (p>1)
Luo Luo, Yang Xuemei
doaj   +1 more source

ON THE INEQUALITIES FOR THE VOLUME OF THE UNIT BALL Ω_n IN R^n

open access: yesПроблемы анализа, 2015
The inequalities about the volume of the unit ball Ω_n in R^n were studies by several authors, especially Horst Alzer has a great contribution to this topic. Thereafter many authors produced numerous papers on this topic.
Barkat Ali Bhayo
doaj   +1 more source

A Compound Ball and Urn Probability Problem [PDF]

open access: yes, 1953
6 pages, 1 article*A Compound Ball and Urn Probability Problem* (Robson, D.
Robson, D. S.   +3 more
core  

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