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** Up:** Modular abelian varieties
** Previous:** Modular abelian varieties

Extending classical work on elliptic curves, A. Agashé and I
found a computable formula for the rational number
under reasonably general hypothesis.
Using similar techniques, I hope to find computable formulas
for rational parts of special values of twists, and of *L*-functions
attached to forms of weight greater than two. I have
already computed
for several thousand abelian
varieties, and hope to extend these computations.

*William A. Stein*

*1999-12-01*