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Previte, Joseph; Previte, Michelle; Vanderschoot, Mary

Copy-paste trees and their growth rates. (English) Zbl 1345.05014

Rocky Mt. J. Math. 46, No. 3, 1029-1054 (2016).
Summary: In this paper, we describe a copy-and-paste method for constructing a class of infinite self-similar trees. A copy-paste tree is constructed by repeatedly attaching copies of a finite tree (called a generator) to certain designated attachment vertices. We show that each generator has an associated nonnegative matrix which can be used to determine a formula for the growth function of the copy-paste tree. In our main theorem, we use results from Perron-Frobenius theory to show that every copy-paste tree has exponential growth, with growth rate equal to the spectral radius of its associated matrix.

MSC:

05C05 Trees
05C10 Planar graphs; geometric and topological aspects of graph theory
05C50 Graphs and linear algebra (matrices, eigenvalues, etc.)

Keywords:

Perron-Frobenius theory; exponential growth; vertex replacement rules
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\textit{J. Previte} et al., Rocky Mt. J. Math. 46, No. 3, 1029--1054 (2016; Zbl 1345.05014)
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