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Regular graphs with four eigenvalues
van Dam, Edwin Robert - Tilburg University, School of Economics and Management - 1994
We study the connected regular graphs with four distinct eigenvalues. Properties and feasibility conditions of the …
Persistent link: https://www.econbiz.de/10011086744
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Bounds on separated pairs of subgraphs, eigenvalues and related polynomials
van Dam, Edwin Robert - Tilburg University, School of Economics and Management - 1995
equally large sets at maximal distance are given, and we find graphs for which the bounds are tight. …
Persistent link: https://www.econbiz.de/10011086745
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Interlacing eigenvalues and graphs
Haemers, W.H. - Tilburg University, School of Economics and Management - 1994
We give several old and some new applications of eigenvalue interlacing to matrices associated to graphs. Bounds are … obtained for characteristic numbers of graphs, such as the size of a maximal (co)clique, the chromatic number, the diameter and … inequalities and regularity results concerning the structure of graphs and block designs. …
Persistent link: https://www.econbiz.de/10011086851
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Disconnected Vertex Sets and Equidistant Code Pairs
Haemers, W.H. - Tilburg University, School of Economics and Management - 1996
Persistent link: https://www.econbiz.de/10011086975
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Graphs with constant μ and μ
van Dam, Edwin Robert; Haemers, W.H. - Tilburg University, School of Economics and Management - 1995
given and characterized. A list of feasible parameter sets for graphs with at most 40 vertices is generated. …
Persistent link: https://www.econbiz.de/10011086995
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Nonregular Graphs with Three Eigenvalues
van Dam, Edwin Robert - Tilburg University, School of Economics and Management - 1997
We study nonregular graphs with three eigenvalues.We determine all the ones with least eigenvalue -2, and give new …
Persistent link: https://www.econbiz.de/10011087074
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5-Chromatic Strongly Regular Graphs
Fiala, N.C.; Haemers, W.H. - Tilburg University, Center for Economic Research - 2003
In this paper, we begin the determination of all primitive strongly regular graphs with chromatic number equal to 5 … set, we must decide which strongly regular graphs, if any, possessing the set are 5-chromatic.In this way, we deal …
Persistent link: https://www.econbiz.de/10011090622
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Enumeration of Cospectral Graphs
Haemers, W.H.; Spence, E. - Tilburg University, Center for Economic Research - 2002
AMS classification: 05C50;
Persistent link: https://www.econbiz.de/10011091394
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Eigenvalues and the diameter of graphs
van Dam, Edwin Robert; Haemers, W.H. - Tilburg University, Center for Economic Research - 1993
Persistent link: https://www.econbiz.de/10011092007
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Optimal Design of Modified Power System Stabilizer Using Multi Objective Based Bio Inspired Algorithms
Butti, Dasu; Mangipudi, Siva Kumar; Rayapudi, Srinivasarao - In: International Journal of Energy Optimization and … 7 (2018) 4, pp. 17-55
In this article, a multi objective and a novel objective based Power System Stabilizer (PSS) design is proposed for a modified Heffron - Philiphs model (MHP) using bio inspired algorithms. A conventional Heffron – Philphs (CHP) model is developed by taking infinite bus voltage as reference,...
Persistent link: https://www.econbiz.de/10012044590