Results 21 to 30 of about 59,171 (165)

Spectral inequalities for nonnegative tensors and their tropical analogues

, 2020
International audienceWe extend some characterizations and inequalities for the eigenvalues of nonnegative matrices, such as Donsker–Varadhan, Friedland–Karlin, Karlin–Ost inequalities, to nonnegative tensors.
Gaubert, Stéphane, Friedland, Shmuel
core   +1 more source

A new Z-eigenvalue localization set for tensors

Journal of Inequalities and Applications, 2017
A new Z-eigenvalue localization set for tensors is given and proved to be tighter than those in the work of Wang et al. (Discrete Contin. Dyn. Syst., Ser. B 22(1):187-198, 2017).
Jianxing Zhao
doaj   +1 more source

Decompositions of n-Partite Nonsignaling Correlation-Type Tensors With Applications

Frontiers in Physics, 2022
When an n-partite physical system is measured by n observers, the joint probabilities of outcomes conditioned on the observables chosen by the n parties form a nonnegative tensor, called an n-partite correlation tensor (CT).
Lihua Bai, Shu Xiao, Zhihua Guo, Huaixin Cao   +3 more
doaj   +1 more source

Some bounds for the Z-eigenpair of nonnegative tensors

Journal of Inequalities and Applications, 2019
Tensor eigenvalue problem is one of important research topics in tensor theory. In this manuscript, we consider the properties of Z-eigenpair of irreducible nonnegative tensors. By estimating the ratio of the smallest and largest components of a positive
Xiaoyu Ma, Yisheng Song
doaj   +1 more source

Adaptive Band Extraction Based on Low Rank Approximated Nonnegative Tucker Decomposition for Anti-Friction Bearing Faults Diagnosis Using Measured Vibration Data

Machines, 2022
Condition monitoring and fault diagnosis are topics of growing interest for improving the reliability of modern industrial systems. As critical structural components, anti-friction bearings often operate under harsh conditions and are contributing ...
Haobin Wen, Long Zhang, Jyoti K. Sinha
doaj   +1 more source

Two S-type Z-eigenvalue inclusion sets for tensors

Journal of Inequalities and Applications, 2017
In this paper, we present two S-type Z-eigenvalue inclusion sets involved with a nonempty proper subset S of N for general tensors. It is shown that the new sets are tighter than those provided by Wang et al. (Discrete Contin. Dyn. Syst., Ser.
Yanan Wang, Gang Wang
doaj   +1 more source

Optimal $Z$-eigenvalue bounds and rank-one approximations [PDF]

Journal of Mahani Mathematical Research
This study explores the $Z$-eigenvalue inclusion theorem, focusing on its role in improving the best rank-one approximation for tensors. We propose novel inclusion sets inspired by Brauer and Brualdi’s frameworks, offering sharper bounds on $Z ...
Abbas Askarizadeh, Mostafa Zangiabadi
doaj   +1 more source

Improved Ky Fan theorems for tensors

Demonstratio Mathematica
In this paper, we introduce two new structured tensors, which are called generalized nonnegative tensors and GM $G\mathcal{M}$ -tensors. These concepts extend the concepts of nonnegative tensors and M $\mathcal{M}$ -tensors.
He Jun, Liu Yanmin, Luo Dongsheng, Zeng Qingyu   +3 more
doaj   +1 more source

Some bounds for the spectral radius of nonnegative tensors

, 2015
© 2014, Springer-Verlag Berlin Heidelberg. In this paper, we extend the well-known column sum bound of the spectral radius for nonnegative matrices to the tensor case, an upper bound of the spectral radius for a nonnegative tensor is given via the ...
Ng, Michael K., Li, Wen
core   +1 more source

Free Trade Zones and Corporate ESG: Evidence From a Quasi‐Natural Experiment in China

Business Strategy and the Environment, EarlyView.
ABSTRACT This study examines how China's Pilot Free Trade Zones (FTZs) influence corporate ESG performance. Using a staggered difference‐in‐differences model on Chinese listed firms from 2009 to 2024, we combine coarsened exact matching (CEM) and geography‐based instrumental variables to ensure robust identification.
Wen Li, Yinghan Zhao, Brian Lucey
wiley   +1 more source