# Spanning trees of finite Sierpiński graphs

Abstract : We show that the number of spanning trees in the finite Sierpiński graph of level $n$ is given by $\sqrt[4]{\frac{3}{20}} (\frac{5}{3})^{-n/2} (\sqrt[4]{540})^{3^n}$. The proof proceeds in two steps: First, we show that the number of spanning trees and two further quantities satisfy a $3$-dimensional polynomial recursion using the self-similar structure. Secondly, it turns out, that the dynamical behavior of the recursion is given by a $2$-dimensional polynomial map, whose iterates can be computed explicitly.
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Cited literature [4 references]

https://hal.inria.fr/hal-01184698
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### Citation

Elmar Teufl, Stephan Wagner. Spanning trees of finite Sierpiński graphs. Fourth Colloquium on Mathematics and Computer Science Algorithms, Trees, Combinatorics and Probabilities, 2006, Nancy, France. pp.411-414, ⟨10.46298/dmtcs.3494⟩. ⟨hal-01184698⟩

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