Restricted walks in regular trees
The electronic journal of combinatorics, Tome 13 (2006)
Let ${\cal T}$ be the Cayley graph of a finitely generated free group $F$. Given two vertices in ${\cal T}$ consider all the walks of a given length between these vertices that at a certain time must follow a number of predetermined steps. We give formulas for the number of such walks by expressing the problem in terms of equations in $F$ and solving the corresponding equations.
@article{10_37236_1119,
author = {Laura Ciobanu and Sa\v{s}a Radomirovi\'c},
title = {Restricted walks in regular trees},
journal = {The electronic journal of combinatorics},
year = {2006},
volume = {13},
doi = {10.37236/1119},
zbl = {1112.05049},
url = {http://geodesic.mathdoc.fr/articles/10.37236/1119/}
}
Laura Ciobanu; Saša Radomirović. Restricted walks in regular trees. The electronic journal of combinatorics, Tome 13 (2006). doi: 10.37236/1119
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