Takeshi OGASAWARA


Department of Mathematics and Statistics, Premedical Sciences
Dokkyo Medical University,
880 Kitakobayashi, Mibu, Shimotsuga, Tochigi, 321-0293, JAPAN

Email: t-ogswr `at' dokkyomed.ac.jp


Research Interests

Algebraic number theory, Automorphic forms
Thesis

A study on elliptic modular forms of weight one, March, 2012, Kyushu University

Refereed Papers
  1. T. Ogasawara, An eigenform of weight one expressed by meromorphic η-quotients, The Ramanujan Journal, Vol. 27, no. 1 (Jan., 2012), 89--99.
  2. T. Ogasawara, Octahedral newforms of weight one associated to three division points of elliptic curves, Functiones et Approximatio, Commentarii Mathematici, Vol. 49, no. 1 (Sep., 2013), 103--109. Adam Mickiewicz University.
  3. Fumiya Amano, Hisatoshi Kodani, Masanori Morishita, Takayuki Sakamoto, and Takahumi Yoshida, with Appendix by Takeshi Ogasawara, Redei's triple symbols and modular forms, Tokyo Journal of Mathematics, Vol. 36, no. 2 (Dec., 2013), 405--427.
  4. T. Ogasawara, A certain eta-quotient and the class number of an imaginary quadratic field, International Journal of Number Theory, Vol. 10, no. 6 (Sep., 2014), 1485--1499.
  5. T. Ogasawara, On Hecke modules generated by eta-products and imaginary quadratic fields, Proceedings of the American Mathematical Society, Vol. 145 (Jan., 2017), 23--37.

Talks at International Conference
  1. Eta-quotients and class numbers of imaginary quadratic fields, 26th Automorphic Forms Workshop, University of British Columbia, Vancouver, Canada, April, 2012.
  2. Eta-quotients of weight one and ideal class groups of imaginary quadratic fields, Workshop on Modular Forms, Kyushu University, May, 2012.         
  3. On Hecke modules generated by eta-quotients of weight one, Modular functions and Quadratic forms -- Number theoretic delights, Osaka University Nakanoshima Center, December 21 (Sat) -- December 23 (Mon), 2013.