Simple Complex Tori of Algebraic Dimension 0

Tatiana Bandman ; Yuri G. Zarhin

Informatics and Automation, Algebra and Arithmetic, Algebraic, and Complex Geometry, Tome 320 (2023), pp. 27-45.

Résumé

Using Galois theory, we explicitly construct (in all complex dimensions $g\ge 2$) an infinite family of simple $g$-dimensional complex tori $T$ that enjoy the following properties: $\bullet $ the Picard number of $T$ is $0;$ in particular, the algebraic dimension of $T$ is $0$; $\bullet $ if $T^\vee $ is the dual of $T$, then $\mathrm {Hom}(T,T^\vee )=\{0\}$; $\bullet $ the automorphism group $\mathrm {Aut}(T)$ of $T$ is isomorphic to $\{\pm 1\} \times \mathbb Z^{g-1}$; $\bullet $ the endomorphism algebra $\mathrm {End}^0(T)$ of $T$ is a purely imaginary number field of degree $2g$.

Détail

Keywords: complex tori
Mots-clés : algebraic dimension 0.

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