2 papers
math.GR2020
The Cayley Graph of Neumann Subgroups
Andrzej Matraś, Artur Siemaszko
All Cayley representations of the distant graph over integers are characterized as Neumann subgroups of the extended modular group. Possible structures of Neumann subgroups a…
math.DS2012
Counting Berg partitions via Sturmian words and substitution tilings
Artur Siemaszko, Maciej P. Wojtkowski
We develop the connection of Berg partitions with special substitution tilings of two tiles. We obtain a new proof that the number of Berg partitions with a fixed connectivity matr…