Geodesic
Controllable graphs
Bulletin de l'Académie serbe des sciences. Classe des sciences mathématiques et naturelles, Tome 36 (2011), p. 81 .

Voir la notice de l'article provenant de la source eLibrary of Mathematical Institute of the Serbian Academy of Sciences and Arts

The eigenvalues of a graph are the eigenvalues of its adjacency matrix. An eigenvalue of a graph is called {\em main} if the corresponding eigenspace contains a vector for which the sum of coordinates is different from 0. Connected graphs in which all eigenvalues are mutually distinct and main have recently attracted attention in control theory.
Classification : 05C50 93B05
Keywords: graph theory, control theory, graph spectra, main eigenvalues, controllability 
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D. Cvetković; P. Rowlinson; Z. Stanić; M.-G. Yoon. Controllable graphs. Bulletin de l'Académie serbe des sciences. Classe des sciences mathématiques et naturelles, Tome 36 (2011), p. 81 . http://geodesic.mathdoc.fr/item/BASS_2011_36_a5/