Results 51 to 60 of about 58,584 (207)
Upper and Lower Bounds for Ranks of the Matrix Expression X-XAX
Abstract and Applied Analysis, 2013 We consider the question of how to take X such that the nonlinear matrix expression X-XAX attains its maximal and minimal possible ranks.
Zhiping Xiong
doaj +1 more source
Upper and lower bounds for a reactive-diffuse system with Arrhenius kinetics
International Journal of Mathematics and Mathematical Sciences, 2006 Comparison arguments are used to study a problem in combustion theory consisting of a nonlinear parabolic equation together with initial and boundary conditions. Upper and lower bounds for the problem are constructed.
Mohammed Al-Refai, Qutaibeh Katatbeh
doaj +1 more source
On a unified integral operator for φ-convex functions
Advances in Difference Equations, 2020 Integral operators have a very vital role in diverse fields of science and engineering. In this paper, we use φ-convex functions for unified integral operators to obtain their upper bounds and upper and lower bounds for symmetric φ-convex functions in ...
Young Chel Kwun +4 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 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 +5 more
doaj +1 more source
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 Bounds for the Spectral Radius of Generalized Reciprocal Distance Matrix of a Graph [PDF]
, 2022 Yuzheng Ma, Yubin Gao, Yanling Shao
openalex +1 more source
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