Results 61 to 70 of about 1,914,031 (237)

On Riemannian manifolds with positive weighted Ricci curvature of negative effective dimension

, 2018
In this paper, we investigate complete Riemannian manifolds satisfying the lower weighted Ricci curvature bound $\mathrm{Ric}_{N} \geq K$ with $K>0$ for the negative effective dimension $N0$, as a counterpart to the classical Obata rigidity theorem.
Mai, Cong Hung
core   +1 more source

Characteristic Min-Polynomial and Eigen Problem of a Matrix over Min-Plus Algebra

JTAM (Jurnal Teori dan Aplikasi Matematika), 2023
Let R_ε=R∪{-∞}, with R being a set of all real numbers. The algebraic structure (R_ε,⊕,⊗) is called max-plus algebra. The task of finding the eigenvalue and eigenvector is called the eigenproblem.
Sahmura Maula Al Maghribi, Siswanto Siswanto, Sutrima Sutrima   +2 more
doaj   +1 more source

Extremal basic frequency of non-homogeneous plates [PDF]

, 2014
In this paper we propose two numerical algorithms to derive the extremal principal eigenvalue of the bi-Laplacian operator under Navier boundary conditions or Dirichlet boundary conditions. Consider a non-homogeneous hinged or clamped plate $\Omega$, the
Mohammadi, Abbasali
core  

Least Squares Problems with Absolute Quadratic Constraints

Journal of Applied Mathematics, 2012
This paper analyzes linear least squares problems with absolute quadratic constraints. We develop a generalized theory following Bookstein's conic-fitting and Fitzgibbon's direct ellipse-specific fitting.
R. Schöne, T. Hanning
doaj   +1 more source

Dynamic Digital Channelizer Based on Spectrum Sensing. [PDF]

PLoS ONE, 2015
The ability to efficiently channelize a received signal with dynamic sub-channel bandwidths is a key requirement of software defined radio (SDR) systems.
Junpeng Hu, Zhen Zuo, Zhiping Huang, Zhi Dong   +3 more
doaj   +1 more source

Adiabatic optimization without local minima [PDF]

, 2014
Several previous works have investigated the circumstances under which quantum adiabatic optimization algorithms can tunnel out of local energy minima that trap simulated annealing or other classical local search algorithms.
Jarret, Michael, Jordan, Stephen P.
core  

Ordering non-bipartite unicyclic graphs with pendant vertices by the least Q-eigenvalue

Journal of Inequalities and Applications, 2016
A unicyclic graph is a connected graph whose number of edges is equal to the number of vertices. Fan et al. (Discrete Math. 313:903-909, 2013) and Liu et al. (Electron. J.
Shu-Guang Guo, Xiaorong Liu, Rong Zhang, Guanglong Yu   +3 more
doaj   +1 more source

On a frame theoretic measure of quality of LTI systems

, 2017
It is of practical significance to define the notion of a measure of quality of a control system, i.e., a quantitative extension of the classical notion of controllability.
Chatterjee, Debasish, Sheriff, Mohammed Rayyan   +1 more
core   +1 more source

New inequalities on the Fan product of M-matrices

Journal of Inequalities and Applications
This paper focuses on the minimum eigenvalue involving the Fan product. By utilizing the Hölder inequality and the classic eigenvalue inclusion theorem, we introduce two novel lower bounds for τ ( A 1 ⋆ A 2 ) $\tau \left ( A_{1}\star A_{2} \right ...
Qin Zhong, Na Li, Chunlan Li
doaj   +1 more source

Existence of a principal eigenvalue for the Tricomi problem

Electronic Journal of Differential Equations, 2000
The existence of a principal eigenvalue is established for the Tricomi problem in normal domains; that is, the existence of a positive eigenvalue of minimum modulus with an associated positive eigenfunction.
Daniela Lupo, Kevin R. Payne
doaj