Variational relations of topological pressure for nonautonomous dynamical systems
This manuscript investigates the relationship between various notions of topological pressures and their corresponding measure-theoretic pressures for nonautonomous dynamical systems, using the framework of the Carath{é}odory-Pesin structure. We establish a pressure distribution principle for the Pesin topological pressure and prove a Billingsley type theorem for the packing topological pressure. Based on these results, we derive a variational principle for packing topological pressure of nonautonomous dynamical systems, revealing a variational connection between packing pressure and the measure-theoretic upper local pressure. Additionally, we explore the applicability of our findings to a typical nonautonomous dynamical system in which the sequence of continuous selfmaps preserves the same Borel probability measures. Finally, we obtain an upper bound for the packing topological pressure on the set of generic points.