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An invariance principle in k-dimensional extended renewal theory

Published online by Cambridge University Press:  14 July 2016

Attila Csenki*
Affiliation:
Universität Freiburg im Breisgau
*
Postal address: Institut für Mathematische Stochastik der Albert–Ludwigs Universität, Hermann Herder Strasse 10, 78 Freiburg im Breisgau, West Germany.

Abstract

Let ·be a sequence of k -dimensional i.i.d. random vectors and define the first-passage times for where (c)v, τ= 1,· ··,k is the covariance matrix of In this paper the weak convergence of Zn in (D[0, ))k is proved under the assumption (0,∞) for all v = 1, ···, k. We deduce the result from the Donsker invariance principle by means of Theorem 5.5 of Billingsley (1968). This method is also used to derive a limit theorem for the first-exit time Mn = min{Nnt for fixed t1,···, tk > 0. The second result is an extension of a theorem of Hunter (1974) whose method of proof applies only if Ρ (ξ1 [0,∞)k) = 1 and μ ν = tv for all v = 1, ···, k.

Type
Research Papers
Copyright
Copyright © Applied Probability Trust 1979 

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References

[1] Billingsley, P. (1968) Convergence of Probability Measures. Wiley, New York.Google Scholar
[2] Gut, A. (1973) A functional central limit theorem connected with extended renewal theory. Z. Wahrscheinlichkeitsth. 27, 123129.Google Scholar
[3] Hunter, J. J. (1974) Renewal theory in two dimensions: asymptotic results. Adv. Appl. Prob. 6, 546562.Google Scholar
[4] Lindvall, T. (1973) Weak convergence of probability measures and random functions in the function space D[0, 8). J. Appl. Prob. 10, 109121.Google Scholar