Transfer operators for ${\Gamma }_0(n)$ and the Hecke operators for the period functions for $PSL(2,Z)$

J. Hilgert, D. Mayer, H. Movasati

In this article we report on a surprising relation between the transfer operators for the congruence subgroups ${\Gamma }_0(n)$ and the Hecke operators on the space of period functions f…