Hostname: page-component-5c6d5d7d68-qks25 Total loading time: 0 Render date: 2024-08-08T07:04:28.037Z Has data issue: false hasContentIssue false

On twisting operators and newforms of half-integral weight

Published online by Cambridge University Press:  22 January 2016

Masaru Ueda*
Affiliation:
Department of Mathematics Faculty of Science Nara Women’s University, Nara 630, Japan (E-Mail: ueda@math.nara-wu.ac.jp)
Rights & Permissions [Opens in a new window]

Extract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

The theory of newforms is very important and useful for arithmetical study of modular forms of integral weight. It is natural to try to extend this theory into the case of modular forms of half-integral weight Until now, several authors have attempted to find a theory of newforms of half-integral weight (cf. [She], [N], [K], [M-R-V], [She-W]). But complete results have not been obtained yet.

Type
Research Article
Copyright
Copyright © Editorial Board of Nagoya Mathematical Journal 1993

References

[A-L] Atkin, A.O.L. and Wen-Ch’ing Winnie Li, Twists of newforms and pseudo-eigenvalues of W-operators, Invent. Math., 48 (1978), 221243.CrossRefGoogle Scholar
[C] Cipra, B. A., On the Niwa-Shintani theta-kernel lifting of modular forms, Nagoya Math. J., 91 (1983), 49117.CrossRefGoogle Scholar
[H] Hijikata, H. Explicit formula of the traces of Hecke Operators for Γo(N) , J. Math. Soc. Japan, 26-1 (1974), 5682.Google Scholar
[K] Kohnen, W. Newforms of half-integral weight, J. reine und angew. Math., 333 (1982), 3272.Google Scholar
[M] Miyake, T. Modular Forms, Springer (1989).CrossRefGoogle Scholar
[M-R-V] Manickam, , Ramakrishnan, , and Vasudevan, , On the theory of newforms of half-integral weight, J. Number Theory, 34 (1990), 210224.CrossRefGoogle Scholar
[N] Niwa, S. On Shimura’s trace formula, Nagoya Math. J., 66 (1977), 183202.Google Scholar
[Sa] Saito, H. On a decomposition of spaces of cusp forms and trace formula of Hecke operators, Nagoya Math. J., 80 (1980), 129165.Google Scholar
[Sh 1] Shimura, G., On modular forms of half integral weight, Ann. of Math. 97 (1973), 440481.CrossRefGoogle Scholar
[Sh 2] Shimura, G., The critical values of certain zeta functions associated with modular forms of half-integral weight, J. Math. Soc. Japan, 33-4 (1981), 649672.Google Scholar
[Sh 3] Shimura, G., Introduction to the arithmetic theory of automorphic functions, Publ. Math. Soc. Japan, 11 (1971), Iwanami Shoten and Princeton Univ. Press.Google Scholar
[She] Shemanske, T. R., Cuspidal newforms and Character twists, J. reine angew. Math., 328 (1981), 5871.Google Scholar
[She-W] Shemanske, T.R. and Walling, H.L., Determining multiplicities of Half-integral weight newforms, (to appear in Pacific J. of Math.).Google Scholar
[S-S] Serre, J.-P. and Stark, H.M., Modular forms of weight 1/2, Springer Lee. Notes in Math., 627(1977), 2767.CrossRefGoogle Scholar
[St] Sturm, J. Theta series of weight 3/2, J. Number Theory, 14 (1982), 353361.Google Scholar
[U1] Ueda, M. The decomposition of the spaces of cusp forms of half-integral weight and trace formula of Hecke operators, J. Math. Kyoto Univ., 28 (1988), 505555.Google Scholar
[U2] Ueda, M. , The trace formulae of twisting operators on the spaces of cusp forms of half-integral weight and some trace relations, Japanese J. Math., 171 (1991), 83135.Google Scholar
[U3] Ueda, M., On operators of Atkin-Lehner type for modular forms of half-integral weight and theta series, (Preprint in Japanese. The translation into English is in preparation.) (1985).Google Scholar
[U4] Ueda, M., Table for modular forms of weight 3/2 , (Preprint) (1987).Google Scholar
[U5] Ueda, M., (in preparation).Google Scholar
[U6] Ueda, M. , Newforms of half-integral weight and the twisting operators, Proc. Japan Acad., 66 (1990), 173175.Google Scholar