• 
  Number Theory Days in Tokyo
  July 4 (Sat) -5(Sun), 2026
  NISSAY Lecture Hall, Graduate School of Mathematical Sciences, The University of Tokyo [2026/07/01]
• 
  Professor Hiroki MASUDA was awarded the 31th JSS Award. [2026/06/02]
• 
  7th Italian-Japanese Workshop on Geometric Properties for Parabolic & Elliptic PDE's
  June 15(Mon) -19(Fri), 2026
  NISSAY Lecture Hall, Graduate School of Mathematical Sciences, The University of Tokyo [2026/05/26]
• 
  Mini workshop on Algebraic Geometry
  June 3(Wed) -5(Fri), 2026
  NISSAY Lecture Hall, Graduate School of Mathematical Sciences, The University of Tokyo [2026/05/25]
• 
  Professor Toshiyuki KOBAYASHI was awarded the 67th Fujihara Award. [2026/05/22]

• 2026/07/03
  Algebraic Geometry Seminar   13:15-14:45   Room #117
  

  Shou Yoshikawa (Institute of Science Tokyo)
  Hodge–Tate splitting and Akizuki–Nakano vanishing
• 2026/07/06
  Seminar on Geometric Complex Analysis   10:30-12:00   Room #126
  

  Xiaojun Wu (Tsukuba Univ.)
  Generalised Ueda Obstruction Classes and Non-Semipositive Line Bundles (English)
   
   
  Tokyo Probability Seminar   16:00-17:30   Room #126
  We are having teatime from 15:20 in the common room on the second floor. Please join us.
  

  Tadahisa Funaki (BIMSA)
  Interface motion from non-gradient Glauber-Kawasaki dynamics
• 2026/07/07
  Operator Algebra Seminars   16:45-18:15   Room #126
  

  Nanami Hashimoto (Keio University)
  Equivalence of categories of KK-theory or E-theory for $C^*$-algebras over topological spaces by reflection functors
   
   
  Tuesday Seminar on Topology   16:00-17:00   Online
  Pre-registration required. See our seminar webpage.
  

  Tatsuhiko Yagasaki (Kyoto Institute of Technology)
  Topological properties of groups of volume-preserving diffeomorphisms and groups of uniform homeomorphisms (JAPANESE)
• 2026/07/08
  Number Theory Seminar   17:00-18:00   Room #117
  

  Vova Sosnilo (RIKEN iTHEMS)
  Descent for algebraic K-theory of algebraic stacks
• 2026/07/13
  Seminar on Geometric Complex Analysis   10:30-12:00   Room #126
  

  Shuho Kanda (The Univ. of Tokyo)
  Holomorphic polynomial crystallographic actions of nilpotent groups (Japanese)
• 2026/07/14
  Operator Algebra Seminars   16:45-18:15   Room #126
  

  Hiroshi Ando (Chiba University)
  TBA
   
   
  Lie Groups and Representation Theory   16:00-17:30   Room #056
  Joint with Tuesday Seminar on Topology.
  

  Yuichiro Tanaka (Graduate School of Mathematical Sciences, The University of Tokyo)
  Visible actions of real reductive groups on complex algebraic varieties
   
   
  Tuesday Seminar on Topology   16:00-17:30   Room #hybrid/056
  Joint with Lie Groups and Representation Theory Seminar. See our seminar webpage.
  

  Yuichiro Tanaka (The University of Tokyo)
  Visible actions of real reductive groups on complex algebraic varieties (JAPANESE)
   
   
  Numerical Analysis Seminar   16:30-18:00   Room #002
  

  Koya Sakakibara (Kanazawa University)
  A Stabilized Dual-SAV Parametric Finite Element Method for Constrained Geometric Flows of Planar Closed Curves (Japanese)
• 2026/07/17
  Colloquium   15:30-16:30   Room #NISSAY Lecture Hall
  

  Hiroki Matui (Graduate School of Mathematical Sciences, The University of Tokyo)
  Topological Full Groups and C*-Algebras Arising from Dynamical Systems (日本語)
• 2026/07/21
  Operator Algebra Seminars   16:45-18:15   Room #126
  

  Yusuke Isono (RIMS, Kyoto Univ.)
  Introduction to Tomita--Takesaki theory

3-8-1 Komaba Meguro-ku Tokyo 153-8914, Japan   TEL: 03-5465-7001 FAX: 03-5465-7011