Central Tehran Branch. IAU
Journal of Linear and Topological Algebra (JLTA)
22520201
23455934
02
01
2013
03
01
Solved and unsolved problems in generalized notions of Connes amenability
1
7
EN
A.
Mahmoodi Kebriya
Department of Mathematics, Faculty of Science, Islamic Azad University,
Central Tehran Branch, Tehran, Iran
We survey the recent investigations on (bounded, sequential) approximate Connes amenability and pseudoConnes amenability for dual Banach algebras. We will discuss the core problems concerning these notions and address the signicance of any solutions to them to the development of the eld.
Connes amenability,pseudoConnes amenability,approximate Connes amenability,injectivity
http://jlta.iauctb.ac.ir/article_514234.html
http://jlta.iauctb.ac.ir/article_514234_4c8d9fa9aaccb6576d0fc86566973078.pdf
Central Tehran Branch. IAU
Journal of Linear and Topological Algebra (JLTA)
22520201
23455934
02
01
2013
03
01
The extension of quadrupled fixed point results in Kmetric spaces
9
23
EN
G.
Soleimani Rad
Young Researchers and Elite club, Central Tehran Branch,
Islamic Azad University, Tehran, Iran

Department of Mathematics, Faculty of Science, Islamic Azad University,
Central Tehran Branch, PO. Code 13185768, Tehran, Iran.
gha.soleimani.sci@iauctb.ac.ir
Recently, Rahimi et al. [Comp. Appl. Math. 2013, In press] defined the concept of quadrupled fied point in Kmetric spaces and proved several quadrupled fixed point theorems for solid cones on Kmetric spaces. In this paper some quadrupled fixed point results for Tcontraction on Kmetric spaces without normality condition are proved. Obtained results extend and generalize wellknown comparable results in the literature.
Kmetric spaces,Quadrupled fixed point,Tcontraction,Sequentially
http://jlta.iauctb.ac.ir/article_514235.html
http://jlta.iauctb.ac.ir/article_514235_a92f5c539f503b402632a39176e6c45f.pdf
Central Tehran Branch. IAU
Journal of Linear and Topological Algebra (JLTA)
22520201
23455934
02
01
2013
03
01
GFrames, gorthonormal bases and gRiesz bases
25
33
EN
S.
S. Karimizad
Department of Mathematics, Faculty of Science, Islamic Azad University,
Central Tehran Branch, Tehran, Iran
GFrames in Hilbert spaces are a redundant set of operators which yield a representation for each vector in the space. In this paper we investigate the connection between gframes, gorthonormal bases and gRiesz bases. We show that a family of bounded operators is a gBessel sequences if and only if the Gram matrix associated to its denes a bounded operator.
Gframes,GBessel sequences,Gorthonormal bases
http://jlta.iauctb.ac.ir/article_514236.html
http://jlta.iauctb.ac.ir/article_514236_f51fb20a99740375e57204585ff2e228.pdf
Central Tehran Branch. IAU
Journal of Linear and Topological Algebra (JLTA)
22520201
23455934
02
01
2013
03
01
Stochastic NonParametric Frontier Analysis
35
49
EN
M.
Rahmani
Department of Mathematics, Science and Research Branch,
Islamic Azad University, Tehran, Iran
Gh.
Jahanshahloo
Department of Mathematics, Science and Research Branch,
Islamic Azad University, Tehran. Iran
In this paper we develop an approach that synthesizes the best features of the two main methods in the estimation of production efficiency. Specically, our approach first allows for statistical noise, similar to Stochastic frontier analysis, and second, it allows modeling multipleinputsmultipleoutputs technologies without imposing parametric assumptions on production relationship, similar to what is done in nonparametric methods. The methodology is based on the theory of local maximum likelihood estimation and extends recent works of Kumbhakar et al. We will use localspherical coordinate system to transform multiinput multioutput data to more exible system which we can use in our approach.We also illustrate the performance of our approach with simulated example.
http://jlta.iauctb.ac.ir/article_514253.html
http://jlta.iauctb.ac.ir/article_514253_d41d8cd98f00b204e9800998ecf8427e.pdf
Central Tehran Branch. IAU
Journal of Linear and Topological Algebra (JLTA)
22520201
23455934
02
01
2013
03
01
Expansion of Bessel and gBessel sequences to dual frames and dual gframes
51
57
EN
M. S.
Asgari
Department of Mathematics, Science and Research Branch, Islamic Azad University, Tehran, Iran
G.
Kavian
Department of Mathematics, Science and Research Branch, Islamic Azad University, Tehran, Iran
kaviangolsa@yahoo.com
In this paper we study the duality of Bessel and gBessel sequences in Hilbert spaces. We show that a Bessel sequence is an inner summand of a frame and the sum of any Bessel sequence with Bessel bound less than one with a Parseval frame is a frame. Next we develop this results to the gframe situation.
Gframes,dual frames,dual gframes
http://jlta.iauctb.ac.ir/article_514254.html
http://jlta.iauctb.ac.ir/article_514254_149bc3a6d8625b59d77402ec7844e9b2.pdf
Central Tehran Branch. IAU
Journal of Linear and Topological Algebra (JLTA)
22520201
23455934
02
01
2013
03
01
Computation of the qth roots of circulant matrices
59
65
EN
M.
Amirfakhrian
Department of Mathematics, Faculty of Science, Islamic Azad University,
Central Tehran Branch, PO. Code 1416894351,
Tehran, Iran
P.
Mohammadi Khanghah
Department of Mathematics, Faculty of Science, Islamic Azad University,
Central Tehran Branch, PO. Code 1416894351,
Tehran, Iran
pmmathematical@yahoo.com
In this paper, we investigate the reduced form of circulant matrices and we show that the problem of computing the qth roots of a nonsingular circulant matrix A can be reduced to that of computing the qth roots of two half size matrices B  C and B + C.
Circulant matrix,Matrix qth root,Principle qth root of circulant matrix,Nonsingular matrix,Reduced form
http://jlta.iauctb.ac.ir/article_514255.html
http://jlta.iauctb.ac.ir/article_514255_467fcc5ff607cd7146f221b5f8235f69.pdf