Construction of half integral weight Siegel modular forms of Sp (2, R) from automorphic forms of the compact twist Sp (2).
On Automorphic Forms on the Unitary Symplectic Group Sp (n) and SL2 (R).
On the field of definition of superspecial polarized abelian varieties and type numbers
Surjectivity of Siegel -operator for square free level and small weight
We show the surjectivity of the (global) Siegel -operator for modular forms for certain congruence subgroups of and weight , where the standard techniques (Poincaré series or Klingen-Eisenstein series) are no longer available. Our main tools are theta series and genus versions of basis problems.
Supersingular curves of genus two and class numbers
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