A basis for S_k(Gamma_0(4)) and representations of integers as sums of squares
A basis for S_k(Gamma_0(4)) and representations of integers as sums of squares
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S_k(Gamma_0(4)) 的基础以及整数平方和的表示
DOI:
10.1007/s11139-011-9341-y
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发表时间:
2012
期刊:
影响因子:
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通讯作者:
Shinji Fukuhara
中科院分区:
文献类型:
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作者:
D.Dikranjan;D.Shakhmatov;Shinji Fukuhara;Tsuyoshi Kato;Yasuhiko Kamiyama;T.Kato;Teruhiko Soma;Naoya Miyazaki;D. Shakhmatov;Naoko Kamada;Yasuhiko Kamiyama;Shinji Fukuhara
In this paper, we find a basis for the spaceSk(Γ0(4)) of cusp forms of even weightkfor the congruence subgroupΓ0(4) in terms of Eisenstein series. As an application, we obtain formulas forr4s(n), the number of ways to represent a nonnegative integernas a sum of 4sintegral squares.