## Yumiko Umegaki (Yumiko Ichihara)

Associate Professor
[English ][

Japanese]
**Research : ** Analytic Number Theory, Automorphic L-function

**Address : **
Department of Mathematics, Faculty of Science, Nara Women's University,

Kitauoyanishi-machi, Nara 630-8506, Japan

**E-mail : ** ichihara [at] cc.nara-wu.ac.jp

Paper

- Y. Ichihara, The first moment of L-functions of primitive forms on $\Gamma_0(p^{\alpha})$ and a basis of old forms, Journal of Number Theory vol. 131, no. 2 (2011) 343-362.
- Y. Ichihara, Estimates of a certain sum involving coefficients of cusp forms in weight and level aspects, Lithuanian Math. J. vol. 48, no. 2 (2008) 188--202.
- Y. Ichihara and K. Matsumoto, On the Siegel-Tatuzawa theorem for a class of L-functions, Kyushu J. Math., vol. 62 (2008), 201--215.
- Y. Ichihara, The evaluation of the sum over arithmetic progressions for the coefficients of the Rankin-Selberg series II, Analytic Number Theory (Beijing/Kyoto, 1999), 173--182, Dev. Math., 6, Kluwer Acad. Publ., Dordrecht,2002.
- Y. Ichihara, The evaluation of the sum over arithmetic progressions for the coefficients of the Rankin-Selberg series, Japan. J. Math. 29 (2003), no. 2, 297--314.
- Y.Ichihara, On Riesz mean for the coefficients of the twisted Rankin-Selberg L-functions, J. Math. Soc. Japan 55 (2003), no. 1, 81--100
- Y. Ichihara, The Siegel-Walfisz theorem for Rankin-Selberg L-functions associated with two cusp forms, Acta Arith. 92 (2000), no. 3, 215--227.