نتایج جستجو برای: bessel operator

تعداد نتایج: 98482  

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه ولی عصر (عج) - رفسنجان - دانشکده ریاضی 1392

let h be a separable hilbert space and let b be the set of bessel sequences in h. by using several interesting results in operator theory we study some topological properties of frames and riesz bases by constructing a banach space structure on b. the convergence of a sequence of elements in b is de_ned and we determine whether important properties of the sequence is preserved under the con...

Journal: :international journal of nonlinear analysis and applications 2015
mohamed el hamma r. daher m. boujeddaine

using a bessel generalized translation, we obtain an analog of titchmarsh's theorem for the bessel transform for functions satisfying the lipschitz condition in the space $mathrm{l}_{p,alpha}(mathbb{r}_{+})$, where $alpha>-frac{1}{2}$ and $1

The theory of c-frames and c-Bessel mappings are the generalizationsof the theory of frames and Bessel sequences. In this paper, weobtain several equivalent conditions for dual of c-Bessel mappings.We show that for a c-Bessel mapping $f$, a retrievalformula with respect to a c-Bessel mapping $g$ is satisfied if andonly if $g$ is sum of the canonical dual of $f$ with a c-Besselmapping which  wea...

Journal: :bulletin of the iranian mathematical society 2012
m. faroughi e. osgooei

the theory of c-frames and c-bessel mappings are the generalizationsof the theory of frames and bessel sequences. in this paper, weobtain several equivalent conditions for dual of c-bessel mappings.we show that for a c-bessel mapping $f$, a retrievalformula with respect to a c-bessel mapping $g$ is satisfied if andonly if $g$ is sum of the canonical dual of $f$ with a c-besselmapping which  wea...

In this paper, we give the spectral theory for eigenvalues and eigenfunctions of a boundary value problem consisting of the linear fractional Bessel operator. Moreover, we show that this operator is self-adjoint, the eigenvalues of the problem are real, and the corresponding eigenfunctions are orthogonal. In this paper, we give the spectral theory for eigenvalues and eigenfunctions...

In this paper we introduce continuous $g$-Bessel multipliers in Hilbert spaces and investigate some of their properties. We provide some conditions under which a continuous $g$-Bessel multiplier is a compact operator. Also, we show the continuous dependency of continuous $g$-Bessel multipliers on their parameters.

Journal: :bulletin of the iranian mathematical society 0
m. r. abdollahpour department of mathematics‎, ‎faculty of sciences‎, ‎university of mohaghegh ardabili‎, ‎ardabil 56199-11367‎, ‎iran. y. alizadeh department of mathematics‎, ‎faculty of sciences‎, ‎university of mohaghegh ardabili‎, ‎ardabil 56199-11367‎, ‎iran.

in this paper we introduce continuous $g$-bessel multipliers in hilbert spaces and investigate some of their properties. we provide some conditions under which a continuous $g$-bessel multiplier is a compact operator. also, we show the continuous dependency of continuous $g$-bessel multipliers on their parameters.

Journal: :international journal of mathematical modelling and computations 0
s. el ouadih department of mathematics, faculty of sciences a¨ın chock,university hassan ii, casablanca, morocco; r. daher department of mathematics, faculty of sciences a¨ın chock,university hassan ii, casablanca, morocco m. el hamma department of mathematics, faculty of sciences a¨ın chock,university hassan ii, casablanca, morocco.

in this paper, using a generalized translation operator, we prove theestimates for the generalized fourier-bessel transform in the space l2 on certainclasses of functions.

Journal: :bulletin of the iranian mathematical society 0
á. barciz department of economics‎, ‎babes-bolyai university‎, ‎400591 cluj-napoca‎, ‎romania and ‎institute of applied mathematics‎, ‎'obuda university‎, ‎1034 budapest‎, ‎hungary. s. kant department of mathematics‎, ‎government dungar college‎, ‎334001 bikaner‎, ‎india. j‎. ‎k‎. ‎ prajapat department of mathematics‎, ‎central university of rajasthan‎, ‎305817 kishangarh‎, ‎rajasthan‎, ‎india.

an operator associated with the wright function is introduced in the open unit disk. differential subordination and superordination results associated with this operator are obtained by investigating appropriate classes of admissible functions. in particular, some inequalities for modified bessel functions are also obtained.

An operator associated with the Wright function is introduced in the open unit disk. Differential subordination and superordination results associated with this operator are obtained by investigating appropriate classes of admissible functions. In particular, some inequalities for modified Bessel functions are also obtained.

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