Results 131 to 140 of about 508,520 (148)

Modules Over Integer Group Rings of Locally Soluble Groups With Minimax Restriction

Journal of Mathematical Sciences, 2012
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
O Yu Dashkova
exaly   +2 more sources

On the minimaxness and coatomicness of local cohomology modules

Czechoslovak Mathematical Journal, 2021
The aim of this paper is to establish some analogues of the local-global principle for local cohomology in the context of minimax and \(\mathcal{C}\)-minimax modules. Let \(R\) be a commutative Noetherian ring with identity and \(I\) an ideal of \(R\). An \(R\)-module \(X\) is called \textit{coatomic} if any proper submodule of \(X\) is contained in a ...
Hatamkhani, Marzieh, Roshan-Shekalgourabi, Hajar   +1 more
openaire   +2 more sources

Finiteness Properties of Minimax and $ \mathfrak{a} $ -Minimax Generalized Local Cohomology Modules

Ukrainian Mathematical Journal, 2013
Let \(R\) be a Noetherian commutative ring with nonzero identity. Let \(I\) be an ideal of \(R\) and \(M, N\) two finitely generated \(R\)-modules. Recall that for any nonegative integer \(i,\) the \(i\)th generalized local cohomology module of \(M\) and \(N\) with respect to \(I\) is defined by \[ H_I^i(M,N):={\varinjlim}_n\mathrm{Ext}^i_R(M/I^nM,N). \
Kianezhad, A., Taherizadeh, A. J.
openaire   +1 more source

On Minimax Modules and Generalized Local Cohomology with Respect to a Pair of Ideals

Acta Mathematica Vietnamica, 2020
Let \(R\) be a commutative Noetherian ring with identity and \(I\) and \(J\) be two ideals of \(R\). There are many generalizations of the notion of local cohomology in the literature. One of these generalizations was introduced by \textit{J. Herzog} [Komplexe, Auflösungen und Dualität in der localen Algebra.
Nam, Nguyen Thanh, Nam, Tran Tuan, Tri, Nguyen Minh   +2 more
openaire   +2 more sources

The decomposition of minimax modules over hyperfinite groups

Archiv der Mathematik, 1993
Let \(G\) be a locally soluble hyperfinite group. The \({\mathbf Z} G\)-module \(A\) is minimax if it has a finite series of \({\mathbf Z} G\)-submodules \(0 = A_ 0 \subseteq A_ 1 \subseteq \cdots \subseteq A_ n = A\) such that each factor \(F_ i = A_ i / A_{i - 1}\) is either an artinian or a noetherian \({\mathbf Z} G\)-module. It is shown that \(A\)
Duan, Z. Y., Tomkinson, M. J.
openaire   +1 more source

Minimaxness and Cofiniteness Properties of Local Cohomology Modules

Communications in Algebra, 2013
Let R be a commutative Noetherian ring, I an ideal of R, and M a non-zero R-module. The purpose of this article is to introduce the notation of the nth finiteness dimension for all n ∈ ℕ0, and to prove the following results: (i) ; (ii) The R-modules are I-cofinite for all and for all minimax submodules N of , the R-modules are finitely generated ...
Kamal Bahmanpour, Reza Naghipour, Monireh Sedghi   +2 more
openaire   +1 more source

An efficient algorithm for the design of weighted minimax M-channel cosine-modulated filter banks

IEEE Transactions on Signal Processing, 1998
This correspondence presents an efficient algorithm for the design of M-channel cosine-modulated filter banks. Our algorithm needs only a few iterations to obtain a weighted minimax solution and provides flexible control of the ripples in the filter's stopband, the overall filter bank transfer function, and the aliasing components.
Goh, C.-K., Lim, Y.-C.
openaire   +2 more sources

A robust optimization model for intensity‐modulated radiotherapy: Cheap‐Minimax

Medical Physics
Abstract Background Over the past three decades, the intensity‐modulated radiotherapy (IMRT) has become a standard technique, enabling highly conformal dose distributions tailored to specific clinical objectives.
Andrés C, Sevilla, Gonzalo, Cabal, Niklas, Wahl, María E, Puerta, Juan C, Rivera   +4 more
openaire   +2 more sources

$${\varvec{\mathcal {S}}}$$ S -minimaxness and local cohomology modules

Archiv der Mathematik, 2018
Let R be a commutative Noetherian ring, $${\mathfrak {a}}$$ an ideal of R, M a finitely generated R-module, and $${\mathcal {S}}$$
openaire   +1 more source

Finding the best equalizer structure for carrierless amplitude-phase modulation using minimax criteria

SPIE Proceedings, 2015
In this paper several structures of equalizers for carrierless amplitude-phase (CAP) modulation applied in intensity-modulation direct-detection optical links are compared. Minimax optimization method is applied to seek for equalizer weights. Discussed are: modulation format independent equalizer, CAP specific feed forward equalizer and infinite ...
openaire   +1 more source