ORIGINAL_ARTICLE
Hyers-Ulam-Rassias stability of a composite
functional equation in various normed spaces
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.
http://bims.iranjournals.ir/article_418_aed1e9f7f9878d1f0b43d5533e3a8583.pdf
2013-07-01T11:23:20
2018-07-22T11:23:20
383
403
Generalized Hyers-Ulam stability
random normed space
non-Archimedean normed spaces
fixed point method
H.
Azadi Kenary
azadi@mail.yu.ac.ir
true
1
Yasouj University
Yasouj University
Yasouj University
LEAD_AUTHOR
ORIGINAL_ARTICLE
A note on superspecial and maximal curves
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.
http://bims.iranjournals.ir/article_419_6a4faa2252a2fb3c19cfbeaa4eca5fa5.pdf
2013-07-01T11:23:20
2018-07-22T11:23:20
405
413
Cartier operator
Supersingular curves
finite fields
maximal curves
A.
Kazemifard
kazemifard.ahmad@stu.sku.ac.ir
true
1
Shahrekord University
Shahrekord University
Shahrekord University
AUTHOR
A.
Naghipour
naghipour@stu.ac.ir
true
2
Shahrekord University
Shahrekord University
Shahrekord University
AUTHOR
S.
Tafazolian
tafazolian@gmail.com
true
3
Institute for Advanced Studies in Basic Sciences
Institute for Advanced Studies in Basic Sciences
Institute for Advanced Studies in Basic Sciences
LEAD_AUTHOR
ORIGINAL_ARTICLE
Contact CR-Warped product submanifolds in Kenmotsu space forms
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.
http://bims.iranjournals.ir/article_420_56f4f671492858923dbce165596202a3.pdf
2013-07-01T11:23:20
2018-07-22T11:23:20
415
429
Kenmotsu space form
Contact CR-warped product
Contact CR-product
M.
Atceken
mehmet.atceken@gop.edu.tr
true
1
Gaziosmanpasa University, Faculty of Arts and Sciences, Department of Mathematics, 60250 Tokat/TURKEY
Gaziosmanpasa University, Faculty of Arts and Sciences, Department of Mathematics, 60250 Tokat/TURKEY
Gaziosmanpasa University, Faculty of Arts and Sciences, Department of Mathematics, 60250 Tokat/TURKEY
LEAD_AUTHOR
ORIGINAL_ARTICLE
On the convergence of three-step random iterative procesess with errors
of nonself asymptotically nonexpansive random
mappings
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}
http://bims.iranjournals.ir/article_421_aa474a911e5779057293406860aac8c4.pdf
2013-07-01T11:23:20
2018-07-22T11:23:20
431
453
Asymptotically nonexpansive nonself random mapping
Weak and strong convergence
Common random fixed points
Completely continuous
Opial's condition
R.
Rashwan
rr_rashwan54@yahoo.com
true
1
Department of Mathematics, University of Assiut, P.O.Box 71516, Assiut, Egypt
Department of Mathematics, University of Assiut, P.O.Box 71516, Assiut, Egypt
Department of Mathematics, University of Assiut, P.O.Box 71516, Assiut, Egypt
AUTHOR
D.
Al-Baqeri
baqeri$_$27@yahoo.com
true
2
Department of
Mathematics, University
of Assiut, P.O.Box 71516, Assiut, Egypt
Department of
Mathematics, University
of Assiut, P.O.Box 71516, Assiut, Egypt
Department of
Mathematics, University
of Assiut, P.O.Box 71516, Assiut, Egypt
AUTHOR
ORIGINAL_ARTICLE
Localization operators on homogeneous spaces
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$.
http://bims.iranjournals.ir/article_422_8480c0250cbcd89dcc3dc2b6983c19d5.pdf
2013-07-01T11:23:20
2018-07-22T11:23:20
455
467
Homogenous space
square integrable representation
n localization operator
Schatten $p$-class operator
R.
Kamyabi Gol
kamyabi@ferdowsi.um.ac.ir
true
1
Ferdowsi University of Mashhad
Ferdowsi University of Mashhad
Ferdowsi University of Mashhad
AUTHOR
F.
Esmaeelzadeh
esmaeelzadeh@alumni.um.ac.ir
true
2
Ferdowsi University of Mashhad
Ferdowsi University of Mashhad
Ferdowsi University of Mashhad
LEAD_AUTHOR
R.
Raisi Tousi
raisi@ferdowsi.um.ac.ir
true
3
Ferdowsi University of Mashhad
Ferdowsi University of Mashhad
Ferdowsi University of Mashhad
AUTHOR
ORIGINAL_ARTICLE
On pairwise weakly Lindelof bitopological spaces
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.
http://bims.iranjournals.ir/article_423_9d5d1804ff1eebe8d009877fcc795014.pdf
2013-07-01T11:23:20
2018-07-22T11:23:20
469
485
bitopological space
ij-weakly Lindelof
pairwise
weakly Lindelof
ij-weakly Lindelof relative
ij-regular open and ij-regular closed
A.
Kilicman
akilic@upm.edu.my
true
1
University Putra Malaysia
University Putra Malaysia
University Putra Malaysia
LEAD_AUTHOR
Z.
Salleh
zabidin@umt.edu.my
true
2
University Malaysia Terengganu
University Malaysia Terengganu
University Malaysia Terengganu
AUTHOR
ORIGINAL_ARTICLE
On nilpotent and solvable polygroups
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.
http://bims.iranjournals.ir/article_424_1382aa8542282fb58e8f5814d16a8370.pdf
2013-07-01T11:23:20
2018-07-22T11:23:20
487
499
(semi)hypergroup
polygroup
derived polygroup
nilpotent
H.
Aghabozorgi
h_aghabozorgi1@yahoo.com
true
1
Department of Mathematics, Yazd University, Yazd, Iran
Department of Mathematics, Yazd University, Yazd, Iran
Department of Mathematics, Yazd University, Yazd, Iran
AUTHOR
M.
Jafarpour
m.j@mail.vru.ac.ir
true
2
Department of Mathematics, Vali-e-Asr University, Rafsanjan, Iran
Department of Mathematics, Vali-e-Asr University, Rafsanjan, Iran
Department of Mathematics, Vali-e-Asr University, Rafsanjan, Iran
AUTHOR
B.
Davvaz
davvaz@yazduni.ac.ir
true
3
Yazd University
Yazd University
Yazd University
LEAD_AUTHOR
ORIGINAL_ARTICLE
Maximum sum element orders of all proper subgroups of
PGL(2, q)
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
http://bims.iranjournals.ir/article_425_131e9bcb13643b18ecd70f5a42b54a7b.pdf
2013-07-01T11:23:20
2018-07-22T11:23:20
501
505
linear groups
maximal subgroups
element order
S.
Jafarian Amri
sm_jafarian@znu.ac.ir
true
1
Zanjan University
Zanjan University
Zanjan University
LEAD_AUTHOR
ORIGINAL_ARTICLE
\phi-Amenable and \phi-biflat Banach algebras
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.
http://bims.iranjournals.ir/article_426_7cc478cf8c3e322dd9f487c878ba4cfc.pdf
2013-07-01T11:23:20
2018-07-22T11:23:20
507
515
Banach algebra
ph-biat
ph-amenable
Z.
Ghorbani
ghorbani@sci.ui.ac.ir
true
1
Depertment of Mathematics-University of Isfahan
Depertment of Mathematics-University of Isfahan
Depertment of Mathematics-University of Isfahan
LEAD_AUTHOR
M.
Lashkarizadeh Bami
lashkari@sci.ui.ac.ir
true
2
Department of Mathematics, University of Isfahan
Department of Mathematics, University of Isfahan
Department of Mathematics, University of Isfahan
AUTHOR
ORIGINAL_ARTICLE
On solubility of groups with finitely many centralizers
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
http://bims.iranjournals.ir/article_427_8d03882cd4079696032e9bedcf5e7396.pdf
2013-07-01T11:23:20
2018-07-22T11:23:20
517
521
centralizer
n-centralizer group
soluble group
M.
Zarrin
zarrin78@gmail.com
true
1
University of Kurdistan
University of Kurdistan
University of Kurdistan
LEAD_AUTHOR
ORIGINAL_ARTICLE
Completely coretractable rings
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.
http://bims.iranjournals.ir/article_428_5da7b8715fe169e19d3b38146e66c250.pdf
2013-07-01T11:23:20
2018-07-22T11:23:20
523
528
coretractable module
retractable module
Kash ring
J.
Zemlicka
zemlicka@karlin.mff.cuni.cz
true
1
Department of Algebra
Faculty of Mathematics and Physics, Charles University in Prague,
Department of Algebra
Faculty of Mathematics and Physics, Charles University in Prague,
Department of Algebra
Faculty of Mathematics and Physics, Charles University in Prague,
LEAD_AUTHOR
ORIGINAL_ARTICLE
Asymptotic properties of the sample mean in adaptive sequential sampling with multiple selection criteria
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.
http://bims.iranjournals.ir/article_429_0d7fda83d0d219c63685429b4eeea04c.pdf
2013-07-01T11:23:20
2018-07-22T11:23:20
529
557
Stratified sampling
Adaptive
two-stage sequential sampling
Asymptotic properties in finite
population
Consistency
Rare population
A.
Parvardeh
a.parvardeh@sci.ui.ac.ir
true
1
Academic Professor
Academic Professor
Academic Professor
LEAD_AUTHOR
B.
Panahbehagh
bardia_p@math.iut.ac.ir
true
2
Isfahan University of Technology
Isfahan University of Technology
Isfahan University of Technology
AUTHOR
M.
Salehi
salehi@qu.edu.qa
true
3
Qatar University
Qatar University
Qatar University
AUTHOR
J.
Brown
j.brown@math.canterbury.ac.nz
true
4
University of Canterbury
University of Canterbury
University of Canterbury
AUTHOR
D.
Smith
drsmith@usgs.gov
true
5
U.S. Geological Survey
U.S. Geological Survey
U.S. Geological Survey
AUTHOR
ORIGINAL_ARTICLE
Biflatness and biprojectivity of Lau product of Banach algebras
Amonge other things we give sufficient and necessary conditions for the Lau product of Banachalgebras to be biflat or biprojective.
http://bims.iranjournals.ir/article_430_ce7376069c17575dc6d19eeb2e34a06b.pdf
2013-07-01T11:23:20
2018-07-22T11:23:20
559
568
bimodule map
$theta$-Lau product
Tensor product
biflat
biprojective
A.
Khoddami
khoddami-alireza@yahoo.com
true
1
Ferdowsi University of Mashhad
Ferdowsi University of Mashhad
Ferdowsi University of Mashhad
AUTHOR
H.
Ebrahimi Vishki
vishki@ferdowsi.um.ac.ir
true
2
Ferdowsi University of Mashhad
Ferdowsi University of Mashhad
Ferdowsi University of Mashhad
LEAD_AUTHOR
ORIGINAL_ARTICLE
Some results on the polynomial numerical hulls of matrices
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 $V^k(A)=sigma(A)$.
http://bims.iranjournals.ir/article_431_3ccef3d5fa00a8a7178d1329d9bbcfd6.pdf
2013-07-01T11:23:20
2018-07-22T11:23:20
569
578
polynomial numerical hull
joint numerical range
normal matrices
H.
Afshin
hamidrezaafshin@yahoo.com
true
1
Department of Mathematics, Vali-e-Asr University of Rafsanjan, Rafsanjan, Iran.
Department of Mathematics, Vali-e-Asr University of Rafsanjan, Rafsanjan, Iran.
Department of Mathematics, Vali-e-Asr University of Rafsanjan, Rafsanjan, Iran.
LEAD_AUTHOR
M.
Mehrjoofard
aahaay@gmail.com
true
2
Department of Mathematics, Vali-e-Asr University of Rafsanjan, Rafsanjan, Iran.
Department of Mathematics, Vali-e-Asr University of Rafsanjan, Rafsanjan, Iran.
Department of Mathematics, Vali-e-Asr University of Rafsanjan, Rafsanjan, Iran.
AUTHOR
A.
Salemi
salemi@uk.ac.ir
true
3
Department of Mathematics, Shahid Bahonar University of Kerman, Kerman, Iran.
Department of Mathematics, Shahid Bahonar University of Kerman, Kerman, Iran.
Department of Mathematics, Shahid Bahonar University of Kerman, Kerman, Iran.
AUTHOR
ORIGINAL_ARTICLE
Rings in which elements are the sum of an
idempotent and a regular element
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
http://bims.iranjournals.ir/article_432_9133bb4819dd6ac2221c6ba470843a82.pdf
2013-07-01T11:23:20
2018-07-22T11:23:20
579
588
clean ring
exchange ring
r-clean ring
von Neumann regular ring
N.
Ashrafi
ashrafi49@yahoo.com
true
1
Semnan University
Semnan University
Semnan University
LEAD_AUTHOR
E.
Nasibi
ebrahimnasibi@yahoo.com
true
2
Semnan University
Semnan University
Semnan University
AUTHOR