ArticleOriginal scientific text

Title

Semi-additive functionals and cocycles in the context of self-similarity

Authors 1, 2

Affiliations

  1. Department of Statistics and Operations Research, University of North Carolina, Chapel Hill, CB#3260, Hanes Hall, Chapel Hill, NC 27599, USA
  2. Department of Mathematics and Statistics, Boston University, 111 Cummington Street, Boston, MA 02215, USA

Abstract

Kernel functions of stable, self-similar mixed moving averages are known to be related to nonsingular flows. We identify and examine here a new functional occuring in this relation and study its properties. To prove its existence, we develop a general result about semi-additive functionals related to cocycles. The functional we identify, is helpful when solving for the kernel function generated by a flow. Its presence also sheds light on the previous results on the subject.

Keywords

stable, self-similar processes with stationary increments, mixed moving averages, nonsingular flows, cocycles, semi-additive functionals

Bibliography

  1. N.H. Bingham, C.M. Goldie and J.L. Teugels, Regular Variation, Cambridge University Press 1987.
  2. I.P. Cornfeld, S.V. Fomin and Y.G. Sinai, Ergodic Theory, Springer-Verlag 1982.
  3. C.D. Jr. Hardin, Isometries on subspaces of Lp, Indiana University Mathematics Journal 30 (1981), 449-465.
  4. S. Kolodyński and J. Rosiński, Group self-similar stable processes in d, Journal of Theoretical Probability 16 (4) (2002), 855-876.
  5. I. Kubo, Quasi-flows, Nagoya Mathematical Journal 35 (1969), 1-30.
  6. I. Kubo, Quasi-flows II: Additive functionals and TQ-systems, Nagoya Mathematical Journal 40 (1970), 39-66.
  7. V. Pipiras and M.S. Taqqu, Decomposition of self-similar stable mixed moving averages, Probability Theory and Related Fields 123 (3)(2002 a), 412-452.
  8. V. Pipiras and M.S. Taqqu, The structure of self-similar stable mixed moving averages, The Annals of Probability 30 (2) (2002 b), 898-932.
  9. V. Pipiras and M.S. Taqqu, Stable stationary processes related to cyclic flows, The Annals of Probability 32 (3A) (2004), 2222-2260.
  10. Preprint. Available at http://www.stat.unc.edu/faculty/pipiras/preprints/articles.html.
  11. J. Rosiński, On the structure of stationary stable processes, The Annals of Probability 23 (1995), 1163-1187.
  12. R.J. Zimmer, Ergodic Theory and Semisimple Groups, Birkhäuser, Boston 1984.
Pages:
149-177
Main language of publication
English
Received
2009-03-16
Published
2010
Exact and natural sciences