2 papers
math.CO2024
Hertzsprung patterns on involutions
Marilena Barnabei, Niccolò Castronuovo, Matteo Silimbani
Hertzsprung patterns, recently introduced by Anders Claesson, are subsequences of a permutation contiguous in both positions and values, and can be seen as a subclass of bivincular…
math.CO2024
Groups generated by pattern avoiding permutations
Marilena Barnabei, Niccolò Castronuovo, Matteo Silimbani
We study groups generated by sets of pattern avoiding permutations. In the first part of the paper we prove some general results concerning the structure of such groups. In the sec…