A note on certain ergodicity coefficients

Francesco Tudisco

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)


We investigate two ergodicity coefficients ɸ ∥∥ and τn−1, originally introduced to bound the subdominant eigenvalues of nonnegative matrices. The former has been generalized to complex matrices in recent years and several properties for such generalized version have been shown so far.We provide a further result concerning the limit of its powers. Then we propose a generalization of the second coefficient τ n−1 and we show that, under mild conditions, it can be used to recast the eigenvector problem Ax = x as a particular M-matrix linear system, whose coefficient matrix can be defined in terms of the entries of A. Such property turns out to generalize the two known equivalent formulations of the Pagerank centrality of a graph.
Original languageEnglish
Pages (from-to)175-185
Number of pages11
JournalSpecial Matrices
Issue number1
Publication statusPublished - 3 Aug 2015


  • ergodicity
  • eigenvalues
  • matrices
  • linear systems
  • pagerank
  • coefficients


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