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arXiv · 1901.00193

On the cohomology of surfaces with $p_g = q = 2$ and maximal Albanese dimension

Johan Commelin·Matteo Penegini
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Abstract

In this paper we study the cohomology of smooth projective complex surfaces $S$ of general type with invariants $p_g = q = 2$ and surjective Albanese morphism. We show that on a Hodge-theoretic level, the cohomology is described by the cohomology of the Albanese variety and a K3 surface $X$ that we call the K3 partner of $S$. Furthermore, we show that in suitable cases we can geometrically construct the K3 partner $X$ and an algebraic correspondence in $S \times X$ that relates the cohomology of $S$ and $X$. Finally, we prove the Tate and Mumford-Tate conjectures for those surfaces $S$ that lie in connected components of the Gieseker moduli space that contain a product-quotient surface.

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Johan Commelin, Matteo Penegini. 2019-01-01. On the cohomology of surfaces with $p_g = q = 2$ and maximal Albanese dimension. https://arxiv.org/abs/1901.00193

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