We present the classification of involutions on Enriques surfaces. We classify them into 18 types with the help of lattice theory due to Nikulin. We also give geometric realizations to all types.
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Univ Roma Tor Vergata, Dipartimento Matemat, Via Ric Sci, I-00173 Rome, ItalyUniv Roma Tor Vergata, Dipartimento Matemat, Via Ric Sci, I-00173 Rome, Italy
Ciliberto, Ciro
Dedieu, Thomas
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Univ Toulouse, Inst Math Toulouse UMR5219, CNRS, UPS IMT, F-31062 Toulouse 9, FranceUniv Roma Tor Vergata, Dipartimento Matemat, Via Ric Sci, I-00173 Rome, Italy
Dedieu, Thomas
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Galati, Concettina
Knutsen, Andreas Leopold
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Univ Bergen, Dept Math, Postboks 7800, N-5020 Bergen, NorwayUniv Roma Tor Vergata, Dipartimento Matemat, Via Ric Sci, I-00173 Rome, Italy