The Shape of Unlabeled Rooted Random Trees

Details The Shape of Unlabeled Rooted Random Trees The Shape of Unlabeled Rooted Random Trees

2010-03-05

arxiv.org/abs/1003.1322v1

Mathematics

Combinatorics

34 pages, 1 figure

Scientific paper

We consider the number of nodes in the levels of unlabelled rooted random trees and show that the stochastic process given by the properly scaled level sizes weakly converges to the local time of a standard Brownian excursion. Furthermore we compute the average and the distribution of the height of such trees. These results extend existing results for conditioned Galton-Watson trees and forests to the case of unlabelled rooted trees and show that they behave in this respect essentially like a conditioned Galton-Watson process.

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