Results 51 to 60 of about 1,914,031 (237)
Open Mathematics, 2016 Some convergent sequences of the lower bounds of the minimum eigenvalue for the Hadamard product of a nonsingular M-matrix B and the inverse of a nonsingular M-matrix A are given by using Brauer’s theorem.
Zhao Jianxing, Sang Caili
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The second Yamabe invariant with singularities [PDF]
, 2012 Let (M,g) be a compact manifold of dimension n greater or equals to 3. We suppose that g is a given metric in a precised Sobolev space and there is a point P in M and d>o such that g is smooth on the ball B(P,d).
Benalili, Mohammed, Boughazi, Hichem
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Cooperative Spectrum Sensing Algorithm Based on Double Eigenvalue Limiting Distribution
Dianxin kexue, 2014 A spectrum sensing algorithm using double eigenvalue limiting（DEL）distributions was presented. The difference between the maximum and the minimum eigenvalue was exploited as the test statistic.
Zhijin zhao, Weikang Hu, Haiquan Wang
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Some Bounds on Eigenvalues of the Hadamard Product and the Fan Product of Matrices
Mathematics, 2019 In this paper, an upper bound on the spectral radius ρ ( A ∘ B ) for the Hadamard product of two nonnegative matrices (A and B) and the minimum eigenvalue τ ( C ★ D ) of the Fan product of two M-matrices (C and D) are researched.
Qianping Guo +3 more
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Minimum higher eigenvalues of Laplacians on graphs
Duke Mathematical Journal, 1996 If \(G\) is an undirected graph, let \(A\) be the adjacency matrix of \(G\), \(D\) be the diagonal matrix whose \((v,v)\) entry is the degree of \(v\), and \(\Delta=D-A\) be the Laplacian of \(G\). If \(G\) is a connected graph, it is known that the eigenvalues of \(\Delta\) satisfy the condition \(0 ...
openaire +4 more sources
Machine Learning Methods for Inferring the Number of UAV Emitters via Massive MIMO Receive Array
Drones, 2023 To provide important prior knowledge for the direction of arrival (DOA) estimation of UAV emitters in future wireless networks, we present a complete DOA preprocessing system for inferring the number of emitters via a massive multiple-input multiple ...
Yifan Li +8 more
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Analytical results for entanglement in the five-qubit anisotropic Heisenberg model
, 2004 We solve the eigenvalue problem of the five-qubit anisotropic Heisenberg model, without use of Bethe's Ansatz, and give analytical results for entanglement and mixedness of two nearest-neighbor qubits.
Arnesen +43 more
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The domination number and the least $Q$-eigenvalue [PDF]
, 2013 A vertex set $D$ of a graph $G$ is said to be a dominating set if every vertex of $V(G)\setminus D$ is adjacent to at least a vertex in $D$, and the domination number $\gamma(G)$ ($\gamma$, for short) is the minimum cardinality of all dominating sets of $
Guo, Shu-Guang +3 more
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Cooperative Spectrum Sensing Using Eigenvalue Fusion for OFDMA and Other Wideband Signals
Journal of Sensor and Actuator Networks, 2013 In this paper, we propose a new approach for the detection of OFDMA and other wideband signals in the context of centralized cooperative spectrum sensing for cognitive radio (CR) applications.
Dayan A. Guimarães +2 more
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Strongly Regular Graphs as Laplacian Extremal Graphs [PDF]
, 2014 The Laplacian spread of a graph is the difference between the largest eigenvalue and the second-smallest eigenvalue of the Laplacian matrix of the graph.
Lin, Fan-Hsuan, Weng, Chih-wen
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