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arxiv: 1602.03463 · v3 · pith:4QKC64UUnew · submitted 2016-02-10 · 🧮 math.AG · math.DS

On the categorical entropy and the topological entropy

classification 🧮 math.AG math.DS
keywords entropycategoricalcategorytopologicalampleanti-canonicalautoequivalencescanonical
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To an exact endofunctor of a triangulated category with a split-generator, the notion of entropy is given by Dimitrov-Haiden-Katzarkov-Kontsevich, which is a (possibly negative infinite) real-valued function of a real variable. In this paper, we propose a conjecture which naturally generalizes the theorem by Gromov-Yomdin, and show that the categorical entropy of a surjective endomorphism of a smooth projective variety is equal to its topological entropy. Moreover, we compute the entropy of autoequivalences of the derived category in the case of the ample canonical or anti-canonical sheaf.

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