Dynamics of meromorphic maps with small topological degree II: Energy and invariant measure

Details Dynamics of meromorphic maps with small topological degree II: Energy and invariant measure Dynamics of meromorphic maps with small topological degree II: Energy and invariant measure

2008-05-25

arxiv.org/abs/0805.3842v2

Mathematics

Dynamical Systems

Minor modifications. Final version, to appear in Comment. Math. Helvet

Scientific paper

We continue our study of the dynamics of meromorphic mappings with small topological degree on a compact K\"ahler surface $X$. Under general hypotheses we are able to construct a canonical invariant measure which is mixing, does not charge pluripolar sets and admits a natural geometric description. Our hypotheses are always satisfied when $X$ has Kodaira dimension zero, or when the mapping is induced by a polynomial endomorphism of $\mathbf{C}^2$. They are new even in the birational case. We also exhibit families of mappings where our assumptions are generically satisfied and show that if counterexamples exist, the corresponding measure must give mass to a pluripolar set.

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