© 1994 by London Mathematical Society
The Tate Conjecture for Generic Abelian Varieties
Department of Mathematics University of Toronto Toronto Canada M5S 1A1
Received 16 June 1992. Revision received 8 April 1993.
Let A
V be a Kuga fibre variety of Mumford's Hodge type, defined over a finitely generated subfield of C, and let
be the generic point of V. We show that any element of
which is invariant under
, for some finite extension E of k(
), is fixed by the semisimple part of the Hodge group of A
. If A
V satisfies the H2-condition, then the Hodge and Tate conjectures are equivalent for A
, and the MumfordTate conjecture is true.