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Mathematics 2007
Superspecial Abelian Varieties and the Eichler Basis Problem for Hilbert Modular FormsDOI: 10.1016/j.jnt.2008.01.006 Abstract: Let $p$ be an unramified prime in a totally real field $L$ such that $h^+(L)=1$. Our main result shows that Hilbert modular newforms of parallel weight two for $\Gamma_0(p)$ can be constructed naturally, via classical theta series, from modules of isogenies of superspecial abelian varieties with real multiplication on a Hilbert moduli space. This can be viewed as a geometric reinterpretation of the Eichler Basis Problem for Hilbert modular forms.
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