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- W4291325392 abstract "We consider stochastic processes arising from dynamical systems simply by evaluating an observable function along the orbits of the system and study marked point processes associated to extremal observations of such time series corresponding to exceedances of high thresholds. Each exceedance is marked by a quantity intended to measure the severity of the exceedance. In particular, we consider marked point processes measuring the aggregate damage by adding all the excesses over the threshold that mark each exceedance (AOT) or simply by adding the largest excesses in a cluster of exceedances (POT). We provide conditions to prove the convergence of such marked point processes to a compound Poisson process, for whose multiplicity distribution we give an explicit formula. These conditions are shown to follow from a strong form of decay of correlations of the system. Moreover, we prove that the convergence of the marked point processes for a `nice' first return induced map can be carried to the original system. The systems considered include non-uniformly expanding maps (in one or higher dimensions), maps with intermittent fixed points or non-recurrent critical points. For a general class of examples, the compound Poisson limit process is computed explicitly and, in particular, in the POT case we obtain a generalised Pareto multiplicity distribution." @default.
- W4291325392 created "2022-08-14" @default.
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- W4291325392 date "2015-07-02" @default.
- W4291325392 modified "2023-09-28" @default.
- W4291325392 title "Convergence of Marked Point Processes of Excesses for Dynamical Systems" @default.
- W4291325392 doi "https://doi.org/10.48550/arxiv.1507.00599" @default.
- W4291325392 hasPublicationYear "2015" @default.
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