Tail Asymptotics of an Infinitely Divisible Space-Time Model with Convolution Equivalent Lévy Measure

Publikation: Working paperForskning

Abstrakt

We consider a space-time random field on Rd × R given as an integral of a kernel function with respect to a Lévy basis with a convolution equivalent Lévy measure. The field obeys causality in time and is thereby not continuous along the time-axis. For a large class of such random fields we study the tail behaviour of certain functionals of the field. It turns out that the tail is asymptotically equivalent to the right tail of the underlying Lévy measure. Particular examples are the asymptotic probability that there is a time-point and a rotation of a spatial object with fixed radius, in which the field exceeds the level x, and that there is a time-interval and a rotation of a spatial object with fixed radius, in which the average of the field exceeds the level x.

OriginalsprogEngelsk
Udgivelses stedAarhus
UdgiverCentre for Stochastic Geometry and Advanced Bioimaging (CSGB), Aarhus University
Antal sider34
StatusUdgivet - 2019
NavnCSGB Research Reports
Nummer9

Emneord

  • Convolution equivalence
  • Infinite divisibility
  • Lévy-based modelling
  • Asymptotic equivalence
  • Sample paths for random fields

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