Results 51 to 60 of about 58,381 (161)

New bounds for the minimum eigenvalue of 𝓜-tensors

Open Mathematics, 2017
A new lower bound and a new upper bound for the minimum eigenvalue of an 𝓜-tensor are obtained. It is proved that the new lower and upper bounds improve the corresponding bounds provided by He and Huang (J. Inequal.
Zhao Jianxing, Sang Caili
doaj   +1 more source

A Novel Approach for Searching the Upper/Lower Bounds of Uncertainty Parameters in Microgrids

Energies, 2018
In this study, a novel method based on μ analysis is presented to search for the upper/lower bounds of uncertainty parameters in microgrids (MGs).
Xiaojun Ding, Kaicheng Li, Yuanzheng Li, Delong Cai, Yi Luo, Youli Dong   +5 more
doaj   +1 more source

Properties of virtual MIMO signal and interference in cooperation cognitive networks

Tongxin xuebao, 2012
A virtual MIMO scheme based on cooperation of the prim and secondary users was proposed in the wireless cognitive networks.The tight upper and lower bounds about the complimentary cumulative distribution function of the virtual MIMO signal and ...
Xu BAO, Tie-cheng SONG, Lian-feng SHEN
doaj   +2 more sources

New Lower and Upper Bounds for Representing Sequences [PDF]

, 2012
Sequence representations supporting queries access, select and rank are at the core of many data structures. There is a considerable gap between different upper bounds, and the few lower bounds, known for such representations, and how they interact with the space used.
Belazzougui, Djamal, Navarro, Gonzalo
openaire   +3 more sources

Upper and lower Ramsey bounds in bounded arithmetic

Annals of Pure and Applied Logic, 2005
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
openaire   +2 more sources

Upper and Lower Bounds on the Smoothed Complexity of the Simplex Method [PDF]

TheoretiCS
The simplex method for linear programming is known to be highly efficient in practice, and understanding its performance from a theoretical perspective is an active research topic. The framework of smoothed analysis, first introduced by Spielman and Teng
Sophie Huiberts, Yin Tat Lee, Xinzhi Zhang   +2 more
doaj   +1 more source

Semidefinite Optimization Providing Guaranteed Bounds on Linear Functionals of Solutions of Linear Integral Equations with Smooth Kernels

Journal of Applied Mathematics, 2014
Based on recent progress on moment problems, semidefinite optimization approach is proposed for estimating upper and lower bounds on linear functionals defined on solutions of linear integral equations with smooth kernels.
Guangming Zhou, Chao Deng, Kun Wu
doaj   +1 more source

Optimal bounds for the generalized Euler–Mascheroni constant

Journal of Inequalities and Applications, 2018
We provide several sharp upper and lower bounds for the generalized Euler–Mascheroni constant. As consequences, some previous bounds for the Euler–Mascheroni constant are improved.
Ti-Ren Huang, Bo-Wen Han, Xiao-Yan Ma, Yu-Ming Chu   +3 more
doaj   +1 more source

New Upper and Lower Bounds for Ramsey Numbers

European Journal of Combinatorics, 2001
The Ramsey number \(R(G_1, G_2)\) is the smallest integer \(p\) such that for any graph \(G\) on \(p\) vertices either \(G\) contains the graph \(G_1\) or the complement \(\overline G\) of \(G\) contains the graph \(G_2\). The paper presents some new upper and lower bound formulas for \(R(G_1,G_2)\) and \(R(K_m, K_n)\).
Huang Yi Ru, , Yang Jian Sheng,
openaire   +2 more sources

Some new sharp bounds for the spectral radius of a nonnegative matrix and its application

Journal of Inequalities and Applications, 2017
In this paper, we give some new sharp upper and lower bounds for the spectral radius of a nonnegative irreducible matrix. Using these bounds, we obtain some new and improved bounds for the signless Laplacian spectral radius of a graph or a digraph.
Jun He, Yan-Min Liu, Jun-Kang Tian, Xiang-Hu Liu   +3 more
doaj   +1 more source