Upper and lower $\alpha(\mu_{X},\mu_{Y})$-continuous multifunctions
M.
Akdag
Cumhuriyet University Science Faculty Department of Mathematics
58140 S_IVAS / TURKEY
author
F.
Erol
Cumhuriyet University Science Faculty Department of Mathematics
58140 S_IVAS / TURKEY
author
text
article
2015
eng
In this paper, a new class of multifunctions, called generalized $\alpha(\mu_{X},\mu_{Y})$-continuous multifunctions, has been dened and studied. Some characterizations and several properties concerning generalized $\alpha(\mu_{X},\mu_{Y})$-continuous multifunctions are obtained. The relationships between generalized $\alpha(\mu_{X},\mu_{Y})$-continuous multifunctions and some known concepts are also discussed.
Journal of Linear and Topological Algebra (JLTA)
Central Tehran Branch, Islamic Azad University
2252-0201
04
v.
01
no.
2015
1
9
http://jlta.iauctb.ac.ir/article_513810_ee0fd50351b16789fd9107c0732b9cab.pdf
Characterization of $G_2(q)$, where $2 < q \equiv 1(mod\ 3)$ by order components
P.
Nosratpour
Department of Mathematics, Ilam Branch,
Islamic Azad University, Ilam, Iran
author
text
article
2015
eng
In this paper we will prove that the simple group $G_2(q)$, where $2 < q \equiv 1(mod3)$ is recognizable by the set of its order components, also other word we prove that if $G$ is a finite group with $OC(G)=OC(G_2(q))$, then $G$ is isomorphic to $G_2(q)$.
Journal of Linear and Topological Algebra (JLTA)
Central Tehran Branch, Islamic Azad University
2252-0201
04
v.
01
no.
2015
11
23
http://jlta.iauctb.ac.ir/article_513811_9eba341c74bd3045dee87b9bd0cdef4e.pdf
Frames for compressed sensing using coherence
L.
Gavruta
Politehnica University of Timisoara, Department of Mathematics,
Piata Victoriei no.2, 300006 Timisoara, Romania
author
G.
Zamani Eskandani
Faculty of Sciences, Department of Mathematics, University of Tabriz,
Tabriz, Iran
author
P.
Gavruta
Politehnica University of Timisoara, Department of Mathematics,
Piata Victoriei no.2, 300006 Timisoara, Romania
author
text
article
2015
eng
We give some new results on sparse signal recovery in the presence of noise, for weighted spaces. Traditionally, were used dictionaries that have the norm equal to 1, but, for random dictionaries this condition is rarely satised. Moreover, we give better estimations then the ones given recently by Cai, Wang and Xu.
Journal of Linear and Topological Algebra (JLTA)
Central Tehran Branch, Islamic Azad University
2252-0201
04
v.
01
no.
2015
25
34
http://jlta.iauctb.ac.ir/article_513812_d615ca1c21b4cd708b5612bb7022dc99.pdf
The solutions to some operator equations in Hilbert $C^*$-module
M.
Mohammadzadeh Karizaki
Department of Mathematics, Mashhad Branch, Islamic Azad University, Mashhad, Iran
author
M.
Hassani
Department of Mathematics, Mashhad Branch, Islamic Azad University, Mashhad, Iran
author
text
article
2015
eng
In this paper, we state some results on product of operators with closed ranges and we solve the operator equation $TXS^*-SX^*T^*= A$ in the general setting of the adjointable operators between Hilbert $C^*$-modules, when $TS = 1$. Furthermore, by using some block operator matrix techniques, we nd explicit solution of the operator equation $TXS^*-SX^*T^*= A$.
Journal of Linear and Topological Algebra (JLTA)
Central Tehran Branch, Islamic Azad University
2252-0201
04
v.
01
no.
2015
35
42
http://jlta.iauctb.ac.ir/article_513813_951b3470a1795ef1334304ce53162f13.pdf
Numerical solution of Fredholm integral-differential equations on unbounded domain
M.
Matinfar
Department of Mathematics, University of Mazandaran, Babolsar,
PO. Code 47416-95447, Iran
author
A.
Riahifar
Department of Mathematics, Islamic Azad University, Chalus Branch,
PO. Code 46615-397, Iran
author
text
article
2015
eng
In this study, a new and efficient approach is presented for numerical solution of Fredholm integro-differential equations (FIDEs) of the second kind on unbounded domain with degenerate kernel based on operational matrices with respect to generalized Laguerre polynomials(GLPs). Properties of these polynomials and operational matrices of integration, differentiation are introduced and are ultilized to reduce the (FIDEs) to the solution of a system of linear algebraic equations with unknown generalized Laguerre coefficients. In addition, two examples are given to demonstrate the validity, efficiency and applicability of the technique.
Journal of Linear and Topological Algebra (JLTA)
Central Tehran Branch, Islamic Azad University
2252-0201
04
v.
01
no.
2015
43
52
http://jlta.iauctb.ac.ir/article_513814_a72d44cf0986fe41d522e4eb91500748.pdf
On duality of modular G-Riesz bases and G-Riesz bases in Hilbert C*-modules
M.
Rashidi-Kouchi
Young Researchers and Elite Club
Kahnooj Branch, Islamic Azad University, Kerman, Iran
author
text
article
2015
eng
In this paper, we investigate duality of modular g-Riesz bases and g-Riesz bases in 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 given g-Riesz basis in Hilbert C*-module. In addition, we obtain sufficient and necessary condition for a dual of a g-Riesz basis to be again a g-Riesz basis. We nd a situation for a g-Riesz basis to have unique dual g-Riesz basis. Also, we show that every modular g-Riesz basis is a g-Riesz basis in Hilbert C*-module but the opposite implication is not true.
Journal of Linear and Topological Algebra (JLTA)
Central Tehran Branch, Islamic Azad University
2252-0201
04
v.
01
no.
2015
53
63
http://jlta.iauctb.ac.ir/article_513815_1265191a1504d3221d0d238b3de41d30.pdf
Fixed Point Theorems for semi $\lambda$-subadmissible Contractions in b-Metric spaces
R. J.
Shahkoohi
Department of Mathematics, Science and Research Branch,
Islamic Azad University, Tehran, Iran
author
A.
Razani
Department of Mathematics, Science and Research Branch,
Islamic Azad University, Tehran, Iran
author
text
article
2015
eng
Here, a new certain class of contractive mappings in the b-metric spaces is introduced. Some fixed point theorems are proved which generalize and modify the recent results in the literature. As an application, some results in the b-metric spaces endowed with a partial ordered are proved.
Journal of Linear and Topological Algebra (JLTA)
Central Tehran Branch, Islamic Azad University
2252-0201
04
v.
01
no.
2015
65
85
http://jlta.iauctb.ac.ir/article_513816_39494436ccf276e6a17420f6d565b1e1.pdf