## Journal of the Mathematical Society of Japan

- J. Math. Soc. Japan
- Volume 51, Number 3 (1999), 715-730.

### Remark on Fourier coefficients of modular forms of half integral weight belonging to Kohnen's spaces

#### Abstract

The purpose of this paper is to derive that the square of Fourier coefficients $a\left(n\right)$ at a square free positive integer $n$ of modular forms $f$ of half integral weight belonging to Kohnen's spaces of arbitrary odd level and of arbitrary primitive character is essentially equal to the critical value of the zeta function attached to the modular form $F$ of integral weight which is the image of $f$ under the Shimura correspondence. Previously, KohnenZagier had obtained an analogous result in the case of Kohnen's spaces of square free level and of trivial character. Our results give some generalizations of them of KohnenZagier. Our method of the proof is similar to that of Shimura's paper concerning Fourier coefficients of Hilbert modular forms of half integral weight over totally real fields.

#### Article information

**Source**

J. Math. Soc. Japan, Volume 51, Number 3 (1999), 715-730.

**Dates**

First available in Project Euclid: 10 June 2008

**Permanent link to this document**

https://projecteuclid.org/euclid.jmsj/1213107913

**Digital Object Identifier**

doi:10.2969/jmsj/05130715

**Mathematical Reviews number (MathSciNet)**

MR1691461

**Zentralblatt MATH identifier**

1012.11035

**Subjects**

Primary: 11F37: Forms of half-integer weight; nonholomorphic modular forms

Secondary: 11F30: Fourier coefficients of automorphic forms 11F67: Special values of automorphic $L$-series, periods of modular forms, cohomology, modular symbols

**Keywords**

Fourier coefficients of modular forms modular forms of half integral weight the special values of zeta functions

#### Citation

KOJIMA, Hisashi. Remark on Fourier coefficients of modular forms of half integral weight belonging to Kohnen's spaces. J. Math. Soc. Japan 51 (1999), no. 3, 715--730. doi:10.2969/jmsj/05130715. https://projecteuclid.org/euclid.jmsj/1213107913