Central Tehran Branch. IAU
Journal of Linear and Topological Algebra (JLTA)
2252-0201
2345-5934
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
a mahmoodi@iauctb.ac.ir
We survey the recent investigations on (bounded, sequential) approximate Connesamenability and pseudo-Connes amenability for dual Banach algebras. We will discuss thecore problems concerning these notions and address the signicance of any solutions to themto the development of the eld.
Connes amenability,pseudo-Connes 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)
2252-0201
2345-5934
02
01
2013
03
01
The extension of quadrupled xed point results in K-metric 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 13185-768, Tehran, Iran.
gha.soleimani.sci@iauctb.ac.ir
Recently, Rahimi et al. [Comp. Appl. Math. 2013, In press] dened the conceptof quadrupled xed point in K-metric spaces and proved several quadrupled xed pointtheorems for solid cones on K-metric spaces. In this paper some quadrupled xed point resultsfor T-contraction on K-metric spaces without normality condition are proved. Obtainedresults extend and generalize well-known comparable results in the literature.
K-metric spaces,Quadrupled xed point,T-contraction,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)
2252-0201
2345-5934
02
01
2013
03
01
G-Frames, g-orthonormal bases and g-Riesz bases
25
33
EN
S
S. Karimizad
Department of Mathematics, Faculty of Science, Islamic Azad University,
Central Tehran Branch, Tehran, Iran
G-Frames in Hilbert spaces are a redundant set of operators which yield a repre-sentation for each vector in the space. In this paper we investigate the connection betweeng-frames, g-orthonormal bases and g-Riesz bases. We show that a family of bounded opera-tors is a g-Bessel sequences if and only if the Gram matrix associated to its denes a boundedoperator.
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)
2252-0201
2345-5934
02
01
2013
03
01
Stochastic Non-Parametric Frontier Analysis
35
49
EN
M
Rahmani
Department of Mathematics, Science and Research Branch,
Islamic Azad University, Tehran. Iran.
smrds2003@yahoo.com (m. rahmani).
Gh
jahanshahloo
Department of Mathematics, Science and Research Branch,
Islamic Azad University, Tehran. Iran.
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)
2252-0201
2345-5934
02
01
2013
03
01
Expansion of Bessel and g-Bessel sequences to dual frames and dual g-frames
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 g-Bessel sequences in Hilbertspaces. We show that a Bessel sequence is an inner summand of a frame and the sum of anyBessel sequence with Bessel bound less than one with a Parseval frame is a frame. Next wedevelop this results to the g-frame situation.
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)
2252-0201
2345-5934
02
01
2013
03
01
Computation of the q-th roots of circulant matrices
59
65
EN
M
Amirfakhrian
Department of Mathematics, Faculty of Science, Islamic Azad University,
Central Tehran Branch, PO. Code 14168-94351,
Tehran, Iran
P
Mohammadi Khanghah
Department of Mathematics, Faculty of Science, Islamic Azad University,
Central Tehran Branch, PO. Code 14168-94351,
Tehran, Iran
pmmathematical@yahoo.com
In this paper, we investigate the reduced form of circulant matrices and we showthat the problem of computing the q-th roots of a nonsingular circulant matrix A can bereduced to that of computing the q-th roots of two half size matrices B C and B + C.c
Circulant matrix,Matrix q-th root,Principle q-th 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