نتایج جستجو برای: hilbert c^{*}

تعداد نتایج: 1078637  

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه لرستان - دانشکده علوم پایه 1396

چکیده: در این رساله ابتدا مفهوم c*-جبر را بیان می کنیم سپس با تجزیه وتحلیل دقیق مقاله های on frames in hilbert modules over pro-c*-algebras, projections on hilbert modules over locally c*-algebras. مفهوم c*-جبر موضعی و قاب ضربگرها در مدول های هیلبرت روی c*-جبرموضعی بیان می شود و نشان می دهیم برخی از ویژگیهای قابها در c*-مدول های هیلبرت برای قاب ضربگرها در مدول های هیلبرت روی c*-جبرموض...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه لرستان - دانشکده علوم پایه 1389

چکیده: در این رساله ابتدا مفهوم c*-جبر را بیان می کنیم سپس با تجزیه وتحلیل دقیق مقاله های on frames in hilbert modules over pro-c*-algebras, projections on hilbert modules over locally c*-algebras. مفهوم c*-جبر موضعی و قاب ضربگرها در مدول های هیلبرت روی c*-جبرموضعی بیان می شود و نشان می دهیم برخی از ویژگیهای قابها در c*-مدول های هیلبرت برای قاب ضربگرها در مدول های هیلبرت روی c*-جبرموض...

In this paper, we define super Hilbert module and investigate frames in this space. Super Hilbert modules are  generalization of super Hilbert spaces in Hilbert C*-module setting. Also, we define frames in a super Hilbert module and characterize them by using of the concept of g-frames in a Hilbert C*-module. Finally, disjoint frames in Hilbert C*-modules are introduced and investigated.

‎In this paper‎, ‎by using the sequence of multipliers‎, ‎we introduce frames with algebraic bounds in Hilbert pro-$ C^* $-modules‎. ‎We investigate the relations between frames and $ ast $-frames‎. ‎Some properties of $ ast $-frames in Hilbert pro-$ C^* $-modules are studied‎. ‎Also‎, ‎we show that there exist two differences between $ ast $-frames in Hilbert pro-$ C^* $-modules and Hilbert $ ...

Controlled frames have been introduced to improve the numerical efficiency of iterative algorithms for inverting the frame operator on abstract Hilbert spaces. Fusion frames and g-frames generalize frames. Hilbert C*-modules form a wide category between Hilbert spaces and Banach spaces. Hilbert C*-modules are generalizations of Hilbert spaces by allowing the inner product to take values in a C*...

Abstract. Certain facts about frames and generalized frames (g- frames) are extended for the g-frames for Hilbert C*-modules. It is shown that g-frames for Hilbert C*-modules share several useful properties with those for Hilbert spaces. The paper also character- izes the operators which preserve the class of g-frames for Hilbert C*-modules. Moreover, a necessary and suffcient condition is ob- ...

Journal: :bulletin of the iranian mathematical society 2012
azadeh alijani mohammad ali dehghan

abstract. certain facts about frames and generalized frames (g- frames) are extended for the g-frames for hilbert c*-modules. it is shown that g-frames for hilbert c*-modules share several useful properties with those for hilbert spaces. the paper also character- izes the operators which preserve the class of g-frames for hilbert c*-modules. moreover, a necessary and suffcient condition is ob- ...

Journal: :journal of algebra and related topics 2013
a. sahleh l. najarpisheh

let $a$ be a $c^*$-algebra and $e$ be a left hilbert $a$-module. in this paper we define a product on $e$ that making it into a banach algebra and show that under the certain conditions $e$  is arens regular. we also study the relationship between derivations of $a$ and $e$.

Journal: :journal of linear and topological algebra (jlta) 0
m rashidi-kouchi young researchers and elite club kahnooj branch, islamic azad university, kerman, iran.

in this paper, we investigate duality of modular g-riesz bases and g-riesz basesin hilbert c*-modules. first we give some characterization of g-riesz bases in hilbert c*-modules, by using properties of operator theory. next, we characterize the duals of a giveng-riesz basis in hilbert c*-module. in addition, we obtain sucient and necessary conditionfor a dual of a g-riesz basis to be again a g...

Frames in Hilbert bimodules are a special case of frames in Hilbert C*-modules. The paper considers A-frames and B-frames and their relationship in a Hilbert A-B-imprimitivity bimodule. Also, it is given that every frame in Hilbert spaces or Hilbert C*-modules is a semi-tight frame. A relation between A-frames and K(H_B)-frames is obtained in a Hilbert A-B-imprimitivity bimodule. Moreover, the ...

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