Central Tehran Branch. IAU
Journal of Linear and Topological Algebra (JLTA)
2252-0201
2345-5934
04
01
2015
04
01
Upper and lower alpha (mu_{X};mu_{ Y} )-continuous multifunctions
1
9
EN
M
Akdag
Cumhuriyet University Science Faculty Department of Mathematics
58140 S_IVAS / TURKEY.
F
Erol
Cumhuriyet University Science Faculty Department of Mathematics
58140 S_IVAS / TURKEY.
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 severalproperties concerning generalized alpha (mu_{X};mu_{ Y} )-continuous multifunctions are obtained. The re-lationships between generalized alpha (mu_{X};mu_{ Y} )-continuous multifunctions and some known con-cepts are also discussed.
Generalized open sets,multifunction,generalized continuity
http://jlta.iauctb.ac.ir/article_513810.html
http://jlta.iauctb.ac.ir/article_513810_ee0fd50351b16789fd9107c0732b9cab.pdf
Central Tehran Branch. IAU
Journal of Linear and Topological Algebra (JLTA)
2252-0201
2345-5934
04
01
2015
04
01
Characterization of G2(q), where 2 < q = 1(mod3) by order components
11
23
EN
P
. Nosratpour
Department of Mathematics, Ilam Branch,
Islamic Azad University, Ilam, Iran.
In this paper we will prove that the simple group G2(q) where 2 < q = 1(mod3)is recognizable by the set of its order components, also other word we prove that if G is anite group with OC(G) = OC(G2(q)), then G is isomorphic to G2(q).
prime graph,order component,linear group
http://jlta.iauctb.ac.ir/article_513811.html
http://jlta.iauctb.ac.ir/article_513811_9eba341c74bd3045dee87b9bd0cdef4e.pdf
Central Tehran Branch. IAU
Journal of Linear and Topological Algebra (JLTA)
2252-0201
2345-5934
04
01
2015
04
01
Frames for compressed sensing using coherence
25
34
EN
L.
Gavruta
Politehnica University of Timisoara, Department of Mathematics,
Piata Victoriei no.2, 300006 Timisoara, Romania;
G
Zamani Eskandani
Faculty of Sciences, Department of Mathematics, University of Tabriz,
Tabriz, Iran.
P
Gavruta
Politehnica University of Timisoara, Department of Mathematics,
Piata Victoriei no.2, 300006 Timisoara, Romania;
pgavruta@yahoo.com
We give some new results on sparse signal recovery in the presence of noise, forweighted spaces. Traditionally, were used dictionaries that have the norm equal to 1, but, forrandom dictionaries this condition is rarely satised. Moreover, we give better estimationsthen the ones given recently by Cai, Wang and Xu.
coherence,compressed sensing,frames
http://jlta.iauctb.ac.ir/article_513812.html
http://jlta.iauctb.ac.ir/article_513812_d615ca1c21b4cd708b5612bb7022dc99.pdf
Central Tehran Branch. IAU
Journal of Linear and Topological Algebra (JLTA)
2252-0201
2345-5934
04
01
2015
04
01
The solutions to some operator equations in Hilbert C*-module
35
42
EN
M
Mohammadzadeh Karizaki
Department of Mathematics, Mashhad Branch, Islamic Azad University, Mashhad, Iran.
mohammadzadehkarizaki@gmail.com
M
Hassani
Department of Mathematics, Mashhad Branch, Islamic Azad University, Mashhad, Iran.
mhassanimath@gmail.com
In this paper, we state some results on product of operators with closed rangesand we solve the operator equation TXS*- SX*T*= A in the general setting of theadjointable operators between Hilbert C*-modules, when TS = 1. Furthermore, by usingsome block operator matrix techniques, we nd explicit solution of the operator equationTXS*- SX*T*= A.
Operator equation,Moore-Penrose inverse,Complemented submodule, Closed
range, Hilbert C*-module
http://jlta.iauctb.ac.ir/article_513813.html
http://jlta.iauctb.ac.ir/article_513813_951b3470a1795ef1334304ce53162f13.pdf
Central Tehran Branch. IAU
Journal of Linear and Topological Algebra (JLTA)
2252-0201
2345-5934
04
01
2015
04
01
Numerical solution of Fredholm integral-dierential equations on unbounded domain
43
52
EN
M
Matinfar
Department of Mathematics, University of Mazandaran, Babolsar,
PO. Code 47416-95447, Iran;
m.matinfar@umz.ac.ir
A
Riahifar
Department of Mathematics, Islamic Azad University, Chalus Branch,
PO. Code 46615-397, Iran.
In this study, a new and ecient approach is presented for numerical solution ofFredholm integro-dierential equations (FIDEs) of the second kind on unbounded domainwith degenerate kernel based on operational matrices with respect to generalized Laguerrepolynomials(GLPs). Properties of these polynomials and operational matrices of integration,dierentiation are introduced and are ultilized to reduce the (FIDEs) to the solution ofa system of linear algebraic equations with unknown generalized Laguerre coecients. Inaddition, two examples are given to demonstrate the validity, eciency and applicability ofthe technique.
Fredholm integro-dierential equations,unbounded domain,generalized
Laguerre polynomials,Operational matrices
http://jlta.iauctb.ac.ir/article_513814.html
http://jlta.iauctb.ac.ir/article_513814_a72d44cf0986fe41d522e4eb91500748.pdf
Central Tehran Branch. IAU
Journal of Linear and Topological Algebra (JLTA)
2252-0201
2345-5934
04
01
2015
04
01
On duality of modular G-Riesz bases and G-Riesz bases in Hilbert C*-modules
53
63
EN
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-Riesz basis. We nd a situation for a g-Rieszbasis to have unique dual g-Riesz basis. Also, we show that every modular g-Riesz basis is ag-Riesz basis in Hilbert C*-module but the opposite implication is not true.
http://jlta.iauctb.ac.ir/article_513815.html
http://jlta.iauctb.ac.ir/article_513815_1265191a1504d3221d0d238b3de41d30.pdf
Central Tehran Branch. IAU
Journal of Linear and Topological Algebra (JLTA)
2252-0201
2345-5934
04
01
2015
04
01
Fixed Point Theorems for semi lambda-subadmissible Contractions in b-Metric spaces
65
85
EN
R.J
Shahkoohi
Department of Mathematics, Science and Research Branch,
Islamic Azad University, Tehran, Iran.
A
Razani
Department of Mathematics, Science and Research Branch,
Islamic Azad University, Tehran, Iran.
Here, a new certain class of contractive mappings in the bmetric spaces is intro-duced. Some xed point theorems are proved which generalize and modify the recent resultsin the literature. As an application, some results in the bmetric spaces endowed with apartial ordered are proved.
fixed point,b-metric
http://jlta.iauctb.ac.ir/article_513816.html
http://jlta.iauctb.ac.ir/article_513816_39494436ccf276e6a17420f6d565b1e1.pdf