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Original Articles

On the Cohomology of the Stover Surface

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ABSTRACT

We study a surface discovered by Stover which is the surface with minimal Euler number and maximal automorphism group among smooth arithmetic ball quotient surfaces. We study the natural map and discuss the problem related to the so-called Lagrangian surfaces. We obtain that this surface S has maximal Picard number and has no higher genus fibrations. We compute that its Albanese variety A is isomorphic to , for α = e2iπ/3.

2000 AMS SUBJECT CLASSIFICATION:

Acknowledgments

We are grateful to Marston Conder and Derek Holt for their help in the computations of Theorem 3, and to the referee for its comments improving the readability of the article.

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