Abstract
In this paper we give some estimates for nonlinear harmonic measures on trees. In particular, we estimate in terms of the size of a set D the value at the origin of the solution to u(x) = F((x, 0),...,(x,m − 1)) for every x ∈ \(\mathbb{T}_m \), a directed tree with m branches with initial datum f + χD. Here F is an averaging operator on ℝm, x is a vertex of a directed tree \(\mathbb{T}_m \) with regular m-branching and (x, i) denotes a successor of that vertex for 0 ≤ i ≤ m − 1.
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Leandro M. Del Pezzo was partially supported by UBACyT 20020110300067 and CONICET PIP 5478/1438 (Argentina).
Carolina A. Mosquera was partially supported by UBACyT 20020100100638, PICT 0436 and CONICET PIP 112 200201 00398 (Argentina).
Julio D. Rossi was partially supported by MTM2011-27998 (Spain).
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Del Pezzo, L.M., Mosquera, C.A. & Rossi, J.D. Estimates for nonlinear harmonic measures on trees. Bull Braz Math Soc, New Series 45, 405–432 (2014). https://doi.org/10.1007/s00574-014-0056-8
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DOI: https://doi.org/10.1007/s00574-014-0056-8