@Article{AzadiKenary2013,
author="Azadi Kenary, H.",
title="Hyers-Ulam-Rassias stability of a composite
functional equation in various normed spaces",
journal="Bulletin of the Iranian Mathematical Society",
year="2013",
volume="39",
number="3",
pages="383-403",
abstract="In this paper, we prove the generalized Hyers-Ulam(or Hyers-Ulam-Rassias ) stability of the following composite functional equation f(f(x)-f(y))=f(x+y)+f(x-y)-f(x)-f(y) in various normed spaces.",
issn="1017-060X",
doi="",
url="http://bims.iranjournals.ir/article_418.html"
}
@Article{Kazemifard2013,
author="Kazemifard, A.
and Naghipour, A. R.
and Tafazolian, S.",
title="A note on superspecial and maximal curves",
journal="Bulletin of the Iranian Mathematical Society",
year="2013",
volume="39",
number="3",
pages="405-413",
abstract="In this note we review a simple criterion, due to Ekedahl, for superspecial curves defined over finite fields.Using this we generalize and give some simple proofs for some well-known superspecial curves.",
issn="1017-060X",
doi="",
url="http://bims.iranjournals.ir/article_419.html"
}
@Article{Atceken2013,
author="Atceken, M.",
title="Contact CR-Warped product submanifolds in Kenmotsu space forms",
journal="Bulletin of the Iranian Mathematical Society",
year="2013",
volume="39",
number="3",
pages="415-429",
abstract="Abstract: In the present paper, we give a necessary and sufficient condition for contact CR-warped product to be contact CR-product in Kenmotsu space forms.",
issn="1017-060X",
doi="",
url="http://bims.iranjournals.ir/article_420.html"
}
@Article{Rashwan2013,
author="Rashwan, R. A.
and Al-Baqeri, D.",
title="On the convergence of three-step random iterative procesess with errors
of nonself asymptotically nonexpansive random
mappings",
journal="Bulletin of the Iranian Mathematical Society",
year="2013",
volume="39",
number="3",
pages="431-453",
abstract="begin{abstract} In this paper, we prove some strong and weak convergence of three step random iterative scheme with errors to common random fixed points of three asymptotically nonexpansive nonself random mappings in a real uniformly convex separable Banach space. end{abstract}",
issn="1017-060X",
doi="",
url="http://bims.iranjournals.ir/article_421.html"
}
@Article{KamyabiGol2013,
author="Kamyabi Gol, R.
and Esmaeelzadeh, F.
and Raisi Tousi, R.",
title="Localization operators on homogeneous spaces",
journal="Bulletin of the Iranian Mathematical Society",
year="2013",
volume="39",
number="3",
pages="455-467",
abstract="Let $G$ be a locally compact group, $H$ be a compact subgroup of $G$ and $varpi$ be a representation of the homogeneous space $G/H$ on a Hilbert space $mathcal H$. For $psi in L^p(G/H), 1leq p leqinfty$, and an admissible wavelet $zeta$ for $varpi$, we define the localization operator $L_{psi,zeta} $ on $mathcal H$ and we show that it is a bounded operator. Moreover, we prove that the localization operator is in Schatten $p$-class and also it is a compact operator for $ 1leq p leqinfty$.",
issn="1017-060X",
doi="",
url="http://bims.iranjournals.ir/article_422.html"
}
@Article{Kilicman2013,
author="Kilicman, A.
and Salleh, Z.",
title="On pairwise weakly Lindelof bitopological spaces",
journal="Bulletin of the Iranian Mathematical Society",
year="2013",
volume="39",
number="3",
pages="469-485",
abstract="In the present paper we introduce and study the notion of pairwise weakly Lindelof bitopological spaces and obtain some results. Further, we also study the pairwise weakly Lindelof subspaces and subsets, and investigate some of their properties. It was proved that a pairwise weakly Lindelof property is not a hereditary property.",
issn="1017-060X",
doi="",
url="http://bims.iranjournals.ir/article_423.html"
}
@Article{Aghabozorgi2013,
author="Aghabozorgi, H.
and Jafarpour, M.
and Davvaz, B.",
title="On nilpotent and solvable polygroups",
journal="Bulletin of the Iranian Mathematical Society",
year="2013",
volume="39",
number="3",
pages="487-499",
abstract="Applications of hypergroups have mainly appeared in special subclasses. One of the important subclasses is the class of polygroups. In this paper, we study the notions of nilpotent and solvable polygroups by using the notion of heart of polygroups. In particular, we give a necessary and sufficient condition between nilpotent (solvable) polygroups and fundamental groups.",
issn="1017-060X",
doi="",
url="http://bims.iranjournals.ir/article_424.html"
}
@Article{JafarianAmri2013,
author="Jafarian Amri, S. M.",
title="Maximum sum element orders of all proper subgroups of
PGL(2, q)",
journal="Bulletin of the Iranian Mathematical Society",
year="2013",
volume="39",
number="3",
pages="501-505",
abstract="In this paper we show that if q is a power of a prime p , then the projective special linear group PSL(2, q) and the stabilizer of a point of the projective line have maximum sum element orders among all proper subgroups of projective general linear group PGL(2, q) for q odd and even respectively",
issn="1017-060X",
doi="",
url="http://bims.iranjournals.ir/article_425.html"
}
@Article{Ghorbani2013,
author="Ghorbani, Z.
and Lashkarizadeh Bami, M.",
title="\phi-Amenable and \phi-biflat Banach algebras",
journal="Bulletin of the Iranian Mathematical Society",
year="2013",
volume="39",
number="3",
pages="507-515",
abstract="In this paper we study the concept of ph-biatness ofa Banach algebra A, where ph is a continuous homomorphism on A.We prove that if ph is a continuous epimorphism on A and A hasa bounded approximate identity and A is ph- biat, then A is ph-amenable. In the case where ph is an isomorphism on A we showthat the ph- amenability of A implies its ph-biatness.",
issn="1017-060X",
doi="",
url="http://bims.iranjournals.ir/article_426.html"
}
@Article{Zarrin2013,
author="Zarrin, M.",
title="On solubility of groups with finitely many centralizers",
journal="Bulletin of the Iranian Mathematical Society",
year="2013",
volume="39",
number="3",
pages="517-521",
abstract="For any group G, let C(G) denote the set of centralizers of G.We say that a group G has n centralizers (G is a Cn-group) if |C(G)| = n.In this note, we prove that every ﬁnite Cn-group with n ≤ 21 is soluble andthis estimate is sharp. Moreover, we prove that every ﬁnite Cn-group with|G| < 30n+1519 is non-nilpotent soluble. This result gives a partial answer to aconjecture raised by A. Ashraﬁ in 2000",
issn="1017-060X",
doi="",
url="http://bims.iranjournals.ir/article_427.html"
}
@Article{Zemlicka2013,
author="Zemlicka, J.",
title="Completely coretractable rings",
journal="Bulletin of the Iranian Mathematical Society",
year="2013",
volume="39",
number="3",
pages="523-528",
abstract="A module $M$ is said to be coretractable if there exists a nonzero homomorphism of every nonzero factor of $M$ into $M$. We prove that all right (left) modules over a ring are coretractable if and only if the ring is Morita equivalent to a finite product of local right and left perfect rings.",
issn="1017-060X",
doi="",
url="http://bims.iranjournals.ir/article_428.html"
}
@Article{Parvardeh2013,
author="Parvardeh, A.
and Panahbehagh, B.
and Salehi, M.
and Brown, J.
and Smith, D.",
title="Asymptotic properties of the sample mean in adaptive sequential sampling with multiple selection criteria",
journal="Bulletin of the Iranian Mathematical Society",
year="2013",
volume="39",
number="3",
pages="529-557",
abstract="We extend the method of adaptive two-stage sequential sampling toinclude designs where there is more than one criteria is used indeciding on the allocation of additional sampling effort. Thesecriteria, or conditions, can be a measure of the targetpopulation, or a measure of some related population. We developMurthy estimator for the design that is unbiased estimators forthe population mean, and propose another, more efficient,estimator. We investigate asymptotic properties of this estimator.We use a simulation study to investigate design properties of themulti-criteria adaptive sequential sampling scheme and also someestimator properties under the design.",
issn="1017-060X",
doi="",
url="http://bims.iranjournals.ir/article_429.html"
}
@Article{Khoddami2013,
author="Khoddami, A. R.
and Ebrahimi Vishki, H. R.",
title="Biflatness and biprojectivity of Lau product of Banach algebras",
journal="Bulletin of the Iranian Mathematical Society",
year="2013",
volume="39",
number="3",
pages="559-568",
abstract="Amonge other things we give sufficient and necessary conditions for the Lau product of Banachalgebras to be biflat or biprojective.",
issn="1017-060X",
doi="",
url="http://bims.iranjournals.ir/article_430.html"
}
@Article{Afshin2013,
author="Afshin, H. R.
and Mehrjoofard, M. A.
and Salemi, A.",
title="Some results on the polynomial numerical hulls of matrices",
journal="Bulletin of the Iranian Mathematical Society",
year="2013",
volume="39",
number="3",
pages="569-578",
abstract="In this note we characterize polynomial numerical hulls of matrices $A in M_n$ such that$A^2$ is Hermitian. Also, we consider normal matrices $A in M_n$ whose $k^{th}$ power are semidefinite. For such matriceswe show that $V^k(A)=sigma(A)$.",
issn="1017-060X",
doi="",
url="http://bims.iranjournals.ir/article_431.html"
}
@Article{Ashrafi2013,
author="Ashrafi, N.
and Nasibi, E.",
title="Rings in which elements are the sum of an
idempotent and a regular element",
journal="Bulletin of the Iranian Mathematical Society",
year="2013",
volume="39",
number="3",
pages="579-588",
abstract="Let R be an associative ring with unity. An element a in R is said to be r-clean if a = e+r, where e is an idempotent and r is a regular (von Neumann) element in R. If every element of R is r-clean, then R is called an r-clean ring. In this paper, we prove that the concepts of clean ring and r-clean ring are equivalent for abelian rings. Further we prove that if 0 and 1 are the only idempotents in R, then an r-clean ring is an exchange ring. Also we show that the center of an r-clean ring is not necessary r-clean, but if 0 and 1 are the only idempotents in R, then the center of an r-clean ring is r-clean. Finally we give some properties and examples of r-clean rings",
issn="1017-060X",
doi="",
url="http://bims.iranjournals.ir/article_432.html"
}