نتایج جستجو برای: compact l

تعداد نتایج: 703648  

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه علوم پایه دامغان 1387

برای گروه آبلی توپولوژیک g، مجموعة تمام همومورفیسم های پیوسته از g بتوی گروه دایره ای t همراه با توپولوژی فشرده- باز و عمل ضرب نقطه ای توابع که یک گروه آبلی توپولوژیک هاسدورف است بعنوان دوگان pontryagin این گروه شناخته می شود. فضای دوگان یک گروه آبلی توپولوژیک از لحاظ جبری ایزومورف با فضای دوگان هر زیرگروه چگال خود می باشد.“l. außenhofer” و “ m. j. chesco” مستقل از هم نشان دادند که فضای دوگان ی...

Journal: :iranian journal of fuzzy systems 2007
shi-zhong bai

in this paper, we study some properties of the near sr-compactnessin l-topological spaces, where l is a fuzzy lattice. the near sr-compactness isa kind of compactness between lowen’s fuzzy compactness and sr-compactness,and it preserves desirable properties of compactness in general topologicalspaces.

Journal: :sahand communications in mathematical analysis 2014
fatemah esmaeelzadeh rajab ali kamyabi gol reihaneh raisi tousi

let  $varpi$ be a representation of the homogeneous space $g/h$, where $g$ be a locally compact group and  $h$ be a compact subgroup of $g$. for  an admissible wavelet $zeta$ for $varpi$  and $psi in l^p(g/h), 1leq p

ژورنال: پژوهش های ریاضی 2019

 Let L  be a frame. We denoted the set of all regular ideals of cozL by rId(cozL) . The aim of this paper is to study these ideals. For a  frame L , we show that  rId(cozL) is a compact completely regular frame and the map jc : rId(cozL)→L  given by jc (I)=⋁I   is a compactification of L which is isomorphism to its  Stone–Čech compactification and is proved that jc have a right adjoint rc : L →...

Journal: :bulletin of the iranian mathematical society 2013
r. kamyabi gol f. esmaeelzadeh r. raisi tousi

let $g$ be a locally compact group, $h$ be a compact subgroup of $g$ and $varpi$ be a representation of the homogeneous space $g/h$ on a hilbert space $mathcal h$. for $psi in l^p(g/h), 1leq p leqinfty$, and an admissible wavelet $zeta$ for $varpi$, we define the localization operator $l_{psi,zeta} $ on $mathcal h$ and we show that it is a bounded operator. moreover, we prove that the localizat...

Journal: :Computers & Mathematics with Applications 1999

Journal: :bulletin of the iranian mathematical society 2011
a. ahmadi a. askari hemmat

this paper is an investigation of $l$-dual frames with respect to a function-valued inner product, the so called $l$-bracket product on $l^{2}(g)$, where g is a locally compact abelian group with a uniform lattice $l$. we show that several well known theorems for dual frames and dual riesz bases in a hilbert space remain valid for $l$-dual frames and $l$-dual riesz bases in $l^{2}(g)$.

Journal: :Journal of Functional Analysis 2020

In this note, we show that cite[Corollary 3.2]{sad} is not always true. In fact, we characterize essential left $phi$-contractibility of the group algebras in terms of compactness of its related locally compact group. Also, we show that for any compact commutative group $G$, $L^{2}(G)$ is always essentially left $phi$-contractible. We discuss the essential left $phi$-contractibility of some Fou...

Let $H$ and $K$ be compact subgroups of locally compact group $G$. By considering the double coset space $Ksetminus G/H$, which equipped with an $N$-strongly quasi invariant measure $mu$, for $1leq pleq +infty$, we make a norm decreasing linear map from $L^p(G)$ onto $L^p(Ksetminus G/H,mu)$ and demonstrate that it may be identified with a quotient space of $L^p(G)$. In addition, we illustrate t...

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