Characterization of Palm measures via bijective point-shifts
Heveling, Matthias ; Last, Günter
Ann. Probab., Tome 33 (2005) no. 1, p. 1698-1715 / Harvested from Project Euclid
The paper considers a stationary point process N in ℝd. A point-map picks a point of N in a measurable way. It is called bijective [Thorisson, H. (2000). Coupling, Stationarity, and Regeneration. Springer, New York] if it is generating (by suitable shifts) a bijective mapping on N. Mecke [Math. Nachr. 65 (1975) 335–344] proved that the Palm measure of N is point-stationary in the sense that it is invariant under bijective point-shifts. Our main result identifies this property as being characteristic for Palm measures. This generalizes a fundamental classical result for point processes on the line (see, e.g., Theorem 11.4 in [Kallenberg, O. (2002). Foundations of Modern Probability, 2nd ed. Springer, New York]) and solves a problem posed in [Thorisson, H. (2000). Coupling, Stationarity, and Regeneration. Springer, New York] and [Ferrari, P. A., Landim, C. and Thorisson, H. (2004). Ann. Inst. H. Poincaré Probab. Statist. 40 141–152]. Our second result guarantees the existence of bijective point-maps that have (almost surely with respect to the Palm measure of N) no fixed points. This answers another question asked by Thorisson. Our final result shows that there is a directed graph with vertex set N that is defined in a translation-invariant way and whose components are almost surely doubly infinite paths. This generalizes and complements one of the main results in [Holroyd, A. E. and Peres, Y. (2003). Electron. Comm. Probab. 8 17–27]. No additional assumptions (as ergodicity, nonlattice type conditions, or a finite intensity) are made in this paper.
Publié le : 2005-09-14
Classification:  Point process,  stationarity,  Palm measure,  point-map,  random graph,  tree,  point-stationarity,  60G55,  60G10
@article{1127395870,
     author = {Heveling, Matthias and Last, G\"unter},
     title = {Characterization of Palm measures via bijective point-shifts},
     journal = {Ann. Probab.},
     volume = {33},
     number = {1},
     year = {2005},
     pages = { 1698-1715},
     language = {en},
     url = {http://dml.mathdoc.fr/item/1127395870}
}
Heveling, Matthias; Last, Günter. Characterization of Palm measures via bijective point-shifts. Ann. Probab., Tome 33 (2005) no. 1, pp.  1698-1715. http://gdmltest.u-ga.fr/item/1127395870/