On relations among Dirichlet series whose coefficients are class numbers of binary cubic forms

Ohno, Yasuo; Taniguchi, Takashi; Wakatsuki, Satoshi

On relations among Dirichlet series whose coefficients are class numbers of binary cubic forms

Authors

Ohno, Yasuo

Taniguchi, Takashi

Wakatsuki, Satoshi

Description

We study the class numbers of integral binary cubic forms. For each $SL_2(Z)$ invariant lattice $L$, Shintani introduced Dirichlet series whose coefficients are the class numbers of binary cubic forms in $L$. We classify the invariant lattices, and investigate explicit relationships between Dirichlet series associated with those lattices. We also study the analytic properties of the Dirichlet series, and rewrite the functional equation in a self dual form using the explicit relationship.
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