Punkt-stabile Inzidenzstrukturen und stochastische Matrizen
Séminaire lotharingien de combinatoire, Tome 11 (1984)
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We show that the projection matrices that appear in Hoffman's theorem (on point-stable incidence structures) and in the ergodic theorem are the matrices of the "kernel projection" on the eigenspace of the Perron-Frobenius eigenvalue. The following version is available: