THE DEVIATION MATRIX OF A CONTINUOUS-TIME MARKOV CHAIN

  • Authors:
  • Pauline Coolen-Schrijner;Erik A. Van Doorn

  • Affiliations:
  • Department of Mathematical Sciences, University of Durham, Durham, UK, E-mail: pauline.schrijner@durham.ac.uk;Faculty of Mathematical Sciences, University of Twente, Enschede, The Netherlands, E-mail: doorn@math.utwente.nl

  • Venue:
  • Probability in the Engineering and Informational Sciences
  • Year:
  • 2002

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Abstract

The deviation matrix of an ergodic, continuous-time Markov chain with transition probability matrix P(·) and ergodic matrix &Pgr; is the matrix D ≡ ∫0∞(P(t) − &Pgr;) dt. We give conditions for D to exist and discuss properties and a representation of D. The deviation matrix of a birth–death process is investigated in detail. We also describe a new application of deviation matrices by showing that a measure for the convergence to stationarity of a stochastically increasing Markov chain can be expressed in terms of the elements of the deviation matrix of the chain.