Volume 42, Issue 1
مرور بر اساس
ارسال های اخیر
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Cohen-Macaulay-ness in codimension for simplicial complexes and expansion functor
(Springer and the Iranian Mathematical Society (IMS), 2016-02-01)In this paper we show that expansion of a Buchsbaum simplicial complex is $CM_t$, for an optimal integer $tgeq 1$. Also, by imposing extra assumptions on a $CM_t$ simplicial complex, we provethat it can be obtained ...
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A note on lacunary series in $mathcal{Q}_K$ spaces
(Springer and the Iranian Mathematical Society (IMS), 2016-02-01)In this paper, under the condition that $K$ is concave, we characterize lacunary series in $Q_{k}$ spaces. We improve a result due to H. Wulan and K. Zhu.
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Weak log-majorization inequalities of singular values between normal matrices and their absolute values
(Springer and the Iranian Mathematical Society (IMS), 2016-02-01)This paper presents two main results that the singular values of the Hadamard product of normal matrices $A_i$ are weakly log-majorized by the singular values of the Hadamard product of $|A_{i}|$ and the singular values ...
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On nonlocal elliptic system of $p$-Kirchhoff-type in $mathbb{R}^N$
(Springer and the Iranian Mathematical Society (IMS), 2016-02-01)Using Nehari manifold methods and Mountain pass theorem, the existence of nontrivial and radially symmetric solutions for a class of $p$-Kirchhoff-type system are established.
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Rings for which every simple module is almost injective
(Springer and the Iranian Mathematical Society (IMS), 2016-02-01)We introduce the class of “right almost V-rings" which is properly between the classes of right V-rings and right good rings. A ring R is called a right almost V-ring if every simple R-module is almost injective. It ...
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Positive solution for Dirichlet $p(t)$-Laplacian BVPs
(Springer and the Iranian Mathematical Society (IMS), 2016-02-01)In this paper we provide existence results for positive solution to Dirichlet p(t)-Laplacian boundary value problems. The sublinear and superlinear cases are considerd.
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The reverse order law for Moore-Penrose inverses of operators on Hilbert C*-modules
(Springer and the Iranian Mathematical Society (IMS), 2016-02-01)Suppose $T$ and $S$ are Moore-Penrose invertible operators betweenHilbert C*-module. Some necessary and sufficient conditions are given for thereverse order law $(TS)^{ dag} =S^{ dag} T^{ dag}$ to hold.In ...
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Linear operators of Banach spaces with range in Lipschitz algebras
(Springer and the Iranian Mathematical Society (IMS), 2016-02-01)In this paper, a complete description concerning linear operators of Banach spaces with range in Lipschitz algebras $lip_al(X)$ is provided. Necessary and sufficient conditions are established to ensure ...
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Erratum: Coupled fixed point results for weakly related mappings in partially ordered metric spaces
(Springer and the Iranian Mathematical Society (IMS), 2016-02-01)In this note we point out and rectify some errors in a recently published paper “N. Singh, R. Jain: Coupled Fixed Point Results For Weakly Related Mappings In Partially Ordered Metric Spaces, Bull. Iranian Math. Soc. 40 ...
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A generalization of $oplus$-cofinitely supplemented modules
(Springer and the Iranian Mathematical Society (IMS), 2016-02-01)We say that a module $M$ is a emph{cms-module} if, for every cofinite submodule $N$ of $M$, there exist submodules $K$ and $K^{'}$ of $M$ such that $K$ is a supplement of $N$, and $K$, $K^{'}$ are mutual supplements ...
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Characterization of some projective special linear groups in dimension four by their orders and degree patterns
(Springer and the Iranian Mathematical Society (IMS), 2016-02-01)Let $G$ be a finite group. The degree pattern of $G$ denoted by $D(G)$ is defined as follows: If $pi(G)={p_{1},p_{2},...,p_{k}}$ such that $p_{1}
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Equivalent a posteriori error estimates for spectral element solutions of constrained optimal control problem in one dimension
(Springer and the Iranian Mathematical Society (IMS), 2016-02-01)In this paper, we study spectral element approximation for a constrained optimal control problem in one dimension. The equivalent a posteriori error estimators are derived for the control, the state and the ...
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On the decomposition of noncosingular $sum$-lifting modules
(Springer and the Iranian Mathematical Society (IMS), 2016-02-01)Let $R$ be a right artinian ring or a perfect commutativering. Let $M$ be a noncosingular self-generator $sum$-liftingmodule. Then $M$ has a direct decomposition $M=oplus_{iin I} M_i$,where each ...
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Bulletin of the Iranian Mathematical Society
(Springer and the Iranian Mathematical Society (IMS), 2016-02-01)
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On Tychonoff's type theorem via grills
(Springer and the Iranian Mathematical Society (IMS), 2016-02-01)Let ${X_{alpha}:alphainLambda}$ be a collection of topological spaces, and $mathcal {G}_{alpha}$ be a grill on $X_{alpha}$ for each $alphainLambda$. We consider Tychonoffrq{}s type Theorem for $X=prod_{alphainLambda ...
