مرور Volume 40, Issue 2 بر اساس عنوان
در حال نمایش موارد 1 - 14 از 14
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Approximating fixed points of nonexpansive mappings and solving systems of variational inequalities
(Springer and the Iranian Mathematical Society (IMS), 2014-04-01)A new approximation method for the set of common fixed points of nonexpansive mappings and the set of solutions of systems of variational inequalities is introduced and studied. Moreover, we apply our main result ...
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Bilateral composition operators on vector-valued Hardy spaces
(Springer and the Iranian Mathematical Society (IMS), 2014-04-01)Let $T$ be a bounded operator on the Banach space $X$ and $ph$ be an analytic self-map of the unit disk $Bbb{D}$. We investigate some operator theoretic properties of bilateral composition operator $C_{ph, T}: f ...
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Bulletin of the Iranian Mathematical Society
(Springer and the Iranian Mathematical Society (IMS), 2014-04-01)
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A characterization of the symmetric group of prime degree
(Springer and the Iranian Mathematical Society (IMS), 2014-04-01)Let $G$ be a finite group and $Gamma(G)$ the prime graph of $G$. Recently people have been using prime graphs to study simple groups. Naturally we pose a question: can we use prime graphs to study almost simple ...
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Finite iterative methods for solving systems of linear matrix equations over reflexive and anti-reflexive matrices
(Springer and the Iranian Mathematical Society (IMS), 2014-04-01)A matrix $Pintextmd{C}^{ntimes n}$ is called a generalized reflection matrix if $P^{H}=P$ and $P^{2}=I$. An $ntimes n$ complex matrix $A$ is said to be a reflexive (anti-reflexive) matrix with respect to the generalized ...
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Gorenstein global dimensions for Hopf algebra actions
(Springer and the Iranian Mathematical Society (IMS), 2014-04-01)Let $H$ be a Hopf algebra and $A$ an $H$-bimodule algebra. In this paper, we investigate Gorenstein global dimensions for Hopf algebras and twisted smash product algebras $Astar H$. Results from the literature ...
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A graphical difference between the inverse and regular semigroups
(Springer and the Iranian Mathematical Society (IMS), 2014-04-01)In this paper we investigate the Green graphs for the regular and inverse semigroups by considering the Green classes of them. And by using the properties of these semigroups, we prove that all of the five Green ...
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Improvements of two preconditioned AOR iterative methods for Z-matrices
(Springer and the Iranian Mathematical Society (IMS), 2014-04-01)In this paper, we propose two preconditioned AOR iterative methods to solve systems of linear equations whose coefficient matrices are Z-matrix. These methods can be considered as improvements of two previously presented ...
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$(m,n)$-algebraically compactness and $(m,n)$-pure injectivity
(Springer and the Iranian Mathematical Society (IMS), 2014-04-01)In this paper, we introduce the notion of $(m,n)$-algebraically compact modules as an analogue of algebraically compact modules and then we show that $(m,n)$-algebraically compactness and $(m,n)$-pure injectivity ...
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On $I$-statistical and $I$-lacunary statistical convergence of order $alpha$
(Springer and the Iranian Mathematical Society (IMS), 2014-04-01)In this paper, following a very recent and new approach, we further generalize recently introduced summability methods, namely, $I$-statistical convergence and $I$-lacunary statistical convergence (which ...
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On generalisations of almost prime and weakly prime ideals
(Springer and the Iranian Mathematical Society (IMS), 2014-04-01)Let $R$ be a commutative ring with identity. A proper ideal $P$ of $R$ is a $(n-1,n)$-$Phi_m$-prime ($(n-1,n)$-weakly prime) ideal if $a_1,ldots,a_nin R$, $a_1cdots a_nin Pbackslash P^m$ ($a_1cdots a_nin Pbackslash ...
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On the decomposable numerical range of operators
(Springer and the Iranian Mathematical Society (IMS), 2014-04-01)Let $V$ be an $n$-dimensional complex inner product space. Suppose $H$ is a subgroup of the symmetric group of degree $m$, and $chi :Hrightarrow mathbb{C} $ is an irreducible character (not necessarily linear). ...
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Weak Banach-Saks property in the space of compact operators
(Springer and the Iranian Mathematical Society (IMS), 2014-04-01)For suitable Banach spaces $X$ and $Y$ with Schauder decompositions and a suitable closed subspace $mathcal{M}$ of some compact operator space from $X$ to $Y$, it is shown that the strong Banach-Saks-ness of all ...
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WZ factorization via Aba y-Broyden-Spedicato algorithms
(Springer and the Iranian Mathematical Society (IMS), 2014-04-01)Classes of Abaffy-Broyden-Spedicato (ABS) methods have been introduced for solving linear systems of equations. The algorithms are powerful methods for developing matrix factorizations and many fundamental numerical ...