11 citations · 12 across the 4 of their papers we have counts for
Showing 2020 · math.DSShow all
2 papers · 2 filters
math.DS2020
Meromorphic first integrals of analytic diffeomorphisms
Antoni Ferragut, Armengol Gasull, Xiang Zhang
We give an upper bound for the number of functionally independent meromorphic first integrals that a discrete dynamical system generated by an analytic map can have in a neighb…
math.DS2020
Centralizers and normalizers of local analytic and formal vector fields
Niclas Kruff, Sebastian Walcher, Xiang Zhang
We investigate the structure of the centralizer and the normalizer of a local analytic or formal differential system at a nondegenerate stationary point, using the theory of Poinca…