Results 61 to 70 of about 7,271 (214)

Chebyshev Smoothing With Adaptive Block‐FSAI Preconditioners for the Multilevel Solution of Higher‐Order Problems With the Partition of Unity Method

open access: yesNumerical Linear Algebra with Applications, Volume 33, Issue 3, June 2026.
ABSTRACT In this paper, we assess the performance of adaptive and nested factorized sparse approximate inverses as smoothers in multilevel V‐cycles, when smoothing is performed following the Chebyshev iteration of the fourth kind, for the efficient solution of linear systems arising from a conforming discretization of higher‐order partial differential ...
Pablo Jiménez Recio   +1 more
wiley   +1 more source

A Novel Mixed‐Hybrid, Higher‐Order Accurate Formulation for Kirchhoff–Love Shells

open access: yesProceedings in Applied Mathematics and Mechanics, Volume 26, Issue 2, June 2026.
ABSTRACT This paper presents a novel mixed‐hybrid finite element formulation for Kirchhoff–Love shells, designed to enable the use of standard C0$C^0$‐continuous higher‐order Lagrange elements. This is possible by introducing the components of the moment tensor as a primary unknown alongside the displacement vector, circumventing the need for C1$C^1 ...
Jonas Neumeyer, Thomas‐Peter Fries
wiley   +1 more source

Characterization of some simple $K_4$-groups by some irreducible complex character degrees [PDF]

open access: yesInternational Journal of Group Theory, 2016
In this paper, we examine that some simple $K_4$-groups can be determined uniquely by their orders and one or two irreducible complex character degrees.
Somayeh Heydari, Neda Ahanjideh
doaj  

Periodic Scenario Trees: A Novel Framework for Robust Periodic Invariance and Stabilization of Constrained Uncertain Linear Systems

open access: yesInternational Journal of Robust and Nonlinear Control, Volume 36, Issue 9, Page 5069-5086, June 2026.
ABSTRACT This work proposes a new framework for stabilizing uncertain linear systems and for determining robust periodic invariant sets and their associated control laws for constrained uncertain linear systems. Necessary and sufficient conditions for stabilizability by periodic controllers are stated and proven using finite step Lyapunov functions for
Yehia Abdelsalam   +2 more
wiley   +1 more source

On irreducible projective representations of finite groups [PDF]

open access: yesSurveys in Mathematics and its Applications, 2009
The paper is a survey type article inwhich we present some results on irreducible projective representations offinite groups. Section 2 includes Curtis and Reiner's theorem inwhich is proved that a finite group has at most a finite number ofinequivalent ...
Tania-Luminiţa Costache
doaj  

Oppenheim–Schur inequalities for causal products

open access: yesBulletin of the London Mathematical Society, Volume 58, Issue 6, June 2026.
Abstract We establish a class of Oppenheim–Schur‐type inequalities for the convolutional Jury product of positive semidefinite matrices. These results extend the classical Schur and Oppenheim inequalities associated with the Hadamard product to a causal convolutional setting.
Dominique Guillot   +2 more
wiley   +1 more source

Managers' Decisions About Informal Accommodation Requests by Employees With and Without Disabilities

open access: yesHuman Resource Management, Volume 65, Issue 3, Page 823-846, May/June 2026.
ABSTRACT Although formal accommodations are required by law across many jurisdictions, many employees seek informal adjustments to their work conditions. These individualized work arrangements are not rooted in legal compliance but are instead provided at managers' discretion.
Silvia Bonaccio   +3 more
wiley   +1 more source

The Schur multiplier of finite symplectic groups

open access: yes, 2020
We show that the Schur multiplier of $Sp(2g,\mathbb Z/D\mathbb Z)$ is $\mathbb Z/2\mathbb Z$, when $D$ is divisible by 4.Comment: Bull. Soc. Math.
Funar, Louis, Pitsch, Wolfgang
core  

A parallel algorithm for generating Pareto‐optimal radiosurgery treatment plans

open access: yesMedical Physics, Volume 53, Issue 5, May 2026.
Abstract Background Using inverse planning tools to create radiosurgery treatment plans is an iterative process, where clinical trade‐offs are explored by changing the relative importance given to different objectives and rerunning the optimizer until a desirable plan is found.
Joakim da Silva   +4 more
wiley   +1 more source

On the Relative Non-Abelian Tensor Product of a Pair of Prime Power Groups

open access: yesJournal of Mathematical Extension, 2015
Let (G,N) be a pair of prime power groups. We give a new upper bound for |N G|, where N G is the non-abelian tensor product of N and G. Among other results, the relative Schur multiplier of free product of groups is determined under some ...
S. H. Jafari
doaj  

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