Please use this identifier to cite or link to this item: http://buratest.brunel.ac.uk/handle/2438/8356
Title: The resistance of randomly grown trees
Authors: Rodgers, GJ
Keywords: Electrical network;Random tree;Vertex;Random Fibonacci sequence;Identical resistors
Issue Date: 2011
Publisher: IOP Publishing Ltd
Citation: Journal of Physics A: Mathematical and Theoretical, 44(50): 505001, Dec 2011
Abstract: An electrical network with the structure of a random tree is considered: starting from a root vertex, in one iteration each leaf (a vertex with zero or one adjacent edges) of the tree is extended by either a single edge with probability p or two edges with probability 1 − p. With each edge having a resistance equal to 1 omega, the total resistance Rn between the root vertex and a busbar connecting all the vertices at the nth level is considered. A dynamical system is presented which approximates Rn, it is shown that the mean value (Rn) for this system approaches (1 + p)/(1 − p) as n → ∞, the distribution of Rn at large n is also examined. Additionally, a random sequence construction akin to a random Fibonacci sequence is used to approximate Rn; this sequence is shown to be related to the Legendre polynomials and its mean is shown to converge with |(Rn) − (1 + p)/(1 − p)| ∼ n−1/2.
Description: Copyright @ 2011 IOP Publishing Ltd. This is a preprint version of the published article which can be accessed from the link below.
URI: http://iopscience.iop.org/1751-8121/44/50/505001/
http://bura.brunel.ac.uk/handle/2438/8356
DOI: http://dx.doi.org/10.1088/1751-8113/44/50/505001
ISSN: 1751-8113
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