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Abhandlungen aus dem Mathematischen Seminar der Universität Hamburg
Article . 2007 . Peer-reviewed
License: Springer TDM
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image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao
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Article . 2007
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Congruences for Fourier coefficients of lifted Siegel modular forms II: The Ikeda lifts

Congruences for Fourier coefficients of lifted Siegel modular forms. II: The Ikeda lifts
Authors: Shin-ichiro Mizumoto;

Congruences for Fourier coefficients of lifted Siegel modular forms II: The Ikeda lifts

Abstract

In part I [Abh. Math. Semin. Univ. Hamb. 75, 97--120 (2005; Zbl 1088.11032)], the author studied whether a congruence for Fourier coefficients of Siegel modular forms is preserved under Eisenstein lifts. Now he proves criteria for the preservation of such congruences under two types of lifts [\textit{T. Ikeda}, Ann. Math. (2) 154, No. 3, 641--681 (2001; Zbl 0998.11023) and Duke Math. J. 131, No. 3, 469--497 (2006; Zbl 1112.11022)], where he uses the linear expression for the lifts as given by \textit{W. Kohnen} [Math. Ann. 322, No. 4, 787--809 (2002; Zbl 1004.11020)]. Reproducing the criteria would be lengthy. Therefore only an example is quoted here: For \(k\in\{6,10\}\), let \(\Delta_{2k}\in S^2_{2k}\) and \(G_{2k}\in M^1_{2k}\) be the normalized cusp forms and Eisenstein series of weight \(2k\) for \(\Gamma_1= \text{SL}_2(\mathbb{Z})\). They satisfy the Ramanujan congruences \(\Delta_{12}\equiv G_{12}\pmod{691}\) and \(\Delta_{20}\equiv G_{20}\pmod{283\cdot 617}\). Let \(\rho_k\) be the inverse of the Shimura correspondence, mapping \(M^1_{2k}\) to the Kohnen plus space \(M^+_{k+1/2}(\Gamma_0(4))\), and for \(k\geq 2\), \(n\equiv k\pmod 2\), let \(\tau^{2n}_{n+k}\) be the Ikeda lift, mapping \(M^+_{k+1/2}(\Gamma_0(4))\) to the space \(M^{2n}_{n+k}\) of Siegel modular forms of genus \(2n\) and weight \(n+ k\). Then the Ramanujan congruences yield the congruences \(\delta_{13/2}\equiv {\zeta(-11)\over \zeta(-5)} H_{13/2}\pmod{691}\) and \(\delta_{21/2}\equiv{\zeta(-19)\over \zeta(-9)} H_{21/2}\pmod{283\cdot 617}\) with normalized cusp forms \(\delta_{k+1/2}\) in the Kohnen plus spaces and the Cohen-Eisenstein series \(H_{k+1/2}\in M^+_{k+ 1/2}(\Gamma_0(4))\) of the indicated weights, and one obtains congruences \(\tau^{2n}_{n+ 6}(\delta_{13/2})\equiv a_n E^{(2n)}_{n+ 6}\pmod{691}\) for even \(n\geq 6\), \(2\leq n\leq 94\), with the Siegel-Eisenstein series \(E^{(2n)}_{n+ 6}\) of genus \(2n\) and weight \(n+ 6\), and with explicitly given constants \(a_n\).

Country
Japan
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Keywords

Siegel modular groups; Siegel and Hilbert-Siegel modular and automorphic forms, Congruences for modular and \(p\)-adic modular forms, Forms of half-integer weight; nonholomorphic modular forms

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
1
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