日本語

College of Science  Department of Science (Mathematics and Informatics Course)

Professor ICHIMURA   Fumio

■ Graduate school The University of Tokyo  Master course  Graduate School, Division of Science  数学専攻課程  1981  Completed  Domestic    The University of Tokyo  Doctor course  Graduate School, Division of Science  数学専攻課程  1986  Withdrawn after completion of required course credits  Domestic      ■ School The University of Tokyo  Faculty of Science  数学科  1979  Graduated  Domestic      ■ Academic degrees 理学博士  The University of Tokyo      ■ Current research field Algebra    ■ Research keywords integer ring, ideal class group, cyclotomic field    ■ Subject of research Hilbert-Speiser number fields and Stickelberger ideals  integer ring, Hilbert-Speiser number fields, Stickelberger ideals  2000-  I am studying on number fields satisfying the Hilbert-Speiser condition at a prime p.   ■ Books Book  都立大学数学教室セミナー報告「岩澤理論入門」  1996  東京都立大学数学教室    市村文男        View details...   ■ Papers Academic paper  On 2-rank of the ideal class groups of totally real number fields  Proceedings of the Japan Academy, Series A  Academic (scientific) journal  Only  58/ 7, 329-332  1982  Humio Ichimura          Academic paper  On the divisibility problem of the class numbers of algebraic number fields  Journal of the Faculty of Science, The University Tokyo  Academic (scientific) journal  Joint  30/ 3, 579-585  1984  Takashi Azuhata, Humio Ichimura          Academic paper  A note on quadratic fields in which a fixed prime number splits completely  Nagoya Mathematical Journal  Academic (scientific) journal  Only  99, 63-71  1985  Humio Ichimura          Academic paper  A note on a global version of the Coleman embedding  Proceedings of the Japan Academy, Series A  Academic (scientific) journal  Only  62/ 9, 347-349  1986  Humio Ichimura          Academic paper  The non-vanishing of a certain Kummer character x_m (after Soule), and some related topics  Advanced Studies in Pure Mathematics  Academic (scientific) journal  Joint  12, 53-64  1987  Humio Ichimura, Katsuhiko Sakaguchi          View details...   ■ Research presentations Symposium  ある種の実２次体の類数について  研究集会「解析数論ー複素関数の値の分布と性質を通して」  2010/10/07    Symposium  アーベル体上の円分Z_p拡大の類数のnon-p-partについて  福岡数論研究集会  2010/08/25    Symposium  Hilbert-Speiser number fields and Stickelberger ideals  Japan-Korea Joint Seminar on Number Theory and Related Topics  2008/11/14    Research announcement  Hilbert-Speiser number fields and Stickelberger ideals; higher conductor case  首都大学整数論セミナー  2007/06/19    Symposium  Stickelberger ideals of conductor p and their application  早稲田大学整数論研究集会  2006/03    View details...   ■ Memberships of academic societies Mathematical Society of Japan -Present  Domestic