Exact Hausdorff measure on the boundary of a Galton–Watson tree
Watanabe, Toshiro
Ann. Probab., Tome 35 (2007) no. 1, p. 1007-1038 / Harvested from Project Euclid
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A necessary and sufficient condition for the almost sure existence of an absolutely continuous (with respect to the branching measure) exact Hausdorff measure on the boundary of a Galton–Watson tree is obtained. In the case where the absolutely continuous exact Hausdorff measure does not exist almost surely, a criterion which classifies gauge functions ϕ according to whether ϕ-Hausdorff measure of the boundary minus a certain exceptional set is zero or infinity is given. Important examples are discussed in four additional theorems. In particular, Hawkes’s conjecture in 1981 is solved. Problems of determining the exact local dimension of the branching measure at a typical point of the boundary are also solved.
Publié le : 2007-05-14
Classification:  Galton–Watson tree,  exact Hausdorff measure,  shift self-similar additive random sequence,  boundary,  branching measure,  dominated variation,  b-decomposable distribution,  60J80,  28A78,  60G18,  28A80 
@article{1178804321,
     author = {Watanabe, Toshiro},
     title = {Exact Hausdorff measure on the boundary of a Galton--Watson tree},
     journal = {Ann. Probab.},
     volume = {35},
     number = {1},
     year = {2007},
     pages = { 1007-1038},
     language = {en},
     url = {http://dml.mathdoc.fr/item/1178804321}
}

Watanabe, Toshiro. Exact Hausdorff measure on the boundary of a Galton–Watson tree. Ann. Probab., Tome 35 (2007) no. 1, pp.  1007-1038. http://gdmltest.u-ga.fr/item/1178804321/