Special values of L-functions by a Siegel–Weil–Kudla–Rallis formula
Special values of L-functions by a Siegel–Weil–Kudla–Rallis formula
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DOI:
10.1016/j.jnt.2006.11.002
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发表时间:
2007-07
影响因子:
0.7
通讯作者:
Çetin Ürtiş
中科院分区:
文献类型:
--
作者:
Çetin Ürtiş
We study the arithmeticity of special values of L-functions attached to cuspforms which are Hecke eigenfunctions on hermitian quaternion groups Sp∗(m,0) which form a reductive dual pair with G=O∗(4n). For f1and f2two cuspforms on H, consider their theta liftings [Formula: see text] and [Formula: see text] on G. Then we compute a Rankin–Selberg type integral and obtain an integral representation of the standard L-function: Also a short proof the Siegel–Weil–Kudla–Rallis formula is given. This implies that at the critical point s=s0=m−n+12 Eisenstein series Eshave rational Fourier coefficients. Via the natural embedding G×G↪G˜=O∗(8n) we restrict the holomorphic Siegel-type Eisenstein series E˜ on G and decompose as a sum over an orthogonal basis for holomorphic cusp forms of fixed type. As a consequence we prove that the space of holomorphic cuspforms for O∗(4n) of given type is spanned by cuspforms so that the finite-prime parts of Fourier coefficients are rational and obtain special value results for the L-functions.