Algebraic versus topological entropy for surfaces over finite fields
Hélène Esnault, Vasudevan Srinivas
| Number | 15 |
|---|---|
| Author | Hélène Esnault |
| Year | 2011 |
We show that, as in de Rham cohomology over the complex numbers, the value of the entropy of an automorphism of the surface over a finite field $\F_q $ is taken on the span of the N\'eron-Severi group inside of $\ell$-adic cohomology. v2: (some) typos removed, exposition (partly) improved.
