Results 101 to 110 of about 5,971,680 (301)

Inverse Extremal Eigenvalue Problems for Multi-Arrowhead Pentadiagonal Matrices

Mathematics
We address the inverse extremal eigenvalue problem (IEEP) for multi-arrowhead pentadiagonal matrices, a structured class that combines pentadiagonal bandwidth with an alternating arrowhead structure.
Susana Arela-Pérez, Hector Flores Callisaya, Hans Nina, Hubert Pickmann-Soto   +3 more
doaj   +1 more source

An inverse eigenvalue problem and an associated approximation problem for generalized K-centrohermitian matrices [PDF]

, 2007
A partially described inverse eigenvalue problem and an associated optimal approximation problem for generalized K-centrohermitian matrices are considered. It is shown under which conditions the inverse eigenproblem has a solution.
Liu, Zhongyun, Faßbender, Heike
core   +1 more source

Revealing the Resonant Physics of Open Photonic Time Crystals

Laser &Photonics Reviews, EarlyView.
ABSTRACT Photonic time crystals (PTCs) are media whose permittivity is modulated periodically in time, enabling momentum bandgaps and parametric amplification of light. Their realization at the nanoscale can revolutionize the study of light‐matter interactions.
Adrià Canós Valero, Sergei Gladyshev, David Globosits, Stefan Rotter, Egor A. Muljarov, Thomas Weiss   +5 more
wiley   +1 more source

Kinematic Features of Voluntary and Involuntary Head Movements in Cervical Dystonia

Movement Disorders, EarlyView.
Abstract Background Cervical dystonia (CD) has a varied motor presentation, combining abnormal postures with complex involuntary head movements. Classification of these motor patterns remains imprecise, relying on descriptive terminology without robust definitions. Objectives To provide a kinematically‐grounded description of the motor phenomenology of
Thomas Hart, Davide Martino, Larissa R. Heideman, Martijn Beudel, Mark J. Edwards, Anna Sadnicka, Francesca Morgante   +6 more
wiley   +1 more source

The Computational Solution of Generalized Inverse Eigenvalue Problem for Pseudo-Jacobi Matrix

Journal of Mathematics
This paper is concerned with two generalized inverse eigenvalue problems for a kind of pseudo-Jacobi matrix. From a non-Hermite matrix, an r×r Jacobi matrix, two distinct real eigenvalues, and part of the corresponding eigenvectors, an n×n pseudo-Jacobi ...
Fuxia Yi, Enhua Li
doaj   +1 more source

The Inverse Eigenvalue Problem of a Graph [PDF]

, 2019
Historically, matrix theory and combinatorics have enjoyed a powerful, mutually beneficial relationship. Examples include: Perron-Frobenius theory describes the relationship between the combinatorial arrangement of the entries of a nonnegative matrix ...
Leslie Hogben, Bryan L. Shader, Hogben, Leslie, Shader, Bryan, Jephian C.-H. Lin, Lin, Jephian   +5 more
core   +1 more source

Inverse Design of Copolyamides via Sequence‐Sensitive Multifidelity Hybrid Models and Teacher–Student Genetic Algorithm

Materials Genome Engineering Advances, EarlyView.
A sequence‐sensitive multi‐fidelity hybrid modeling framework combined with a teacher‐student genetic algorithm enables the inverse design of copolyamides. The hybrid model balances prediction accuracy, sequence‑sensitivity, and computational cost. A two‑tier genetic algorithm can efficiently identify the monomer structures and ratios of copolyamides ...
Sheng Chen, Chaoran Huang, Jianan Hong, Yuquan He, Yuemeng Qiao, Yang Zhao, Siqin Song, Jiaping Lin, Liang Gao   +8 more
wiley   +1 more source

Efficient free vibration analysis of large structures with close or ultiple natural frequencies. Part II: Damped structures

Computer Assisted Methods in Engineering and Science, 2023
An efficient solution method is presented to solve the eigenvalue problem arising in the dynamic analysis of nonproportionally damped structural systems with close or multiple eigenvalues. The proposed method is obtained by applying the modified Newton-
In-Won Lee, Hyung-Jo Jung, Man-Cheol Kim
doaj  

The 0-1 inverse maximum stable set problem [PDF]

Given an instance of a weighted combinatorial optimization problem and its feasible solution, the usual inverse problem is to modify as little as possible (with respect to a fixed norm) the given weight system to make the giiven feasible solution optimal.
Yerim Chung, Marc Demange
core  

Exponential Stability of Higher Order Fractional Neutral Stochastic Differential Equation Via Integral Contractors

Mathematical Methods in the Applied Sciences, Volume 48, Issue 6, Page 6425-6446, April 2025.
ABSTRACT The well‐posedness results for mild solutions to the fractional neutral stochastic differential system with Rosenblatt process with Hurst index Ĥ∈12,1$$ \hat{H}\in \left(\frac{1}{2},1\right) $$ is discussed in this article. To demonstrate the results, the concept of bounded integral contractors is combined with the stochastic result and ...
Dimplekumar N. Chalishajar, Dhanalakshmi Kasinathan, Ramkumar Kasinathan, Ravikumar Kasinathan   +3 more
wiley   +1 more source