Recent and Coming Talks

• (with Takuro Abe) What makes arrangements free? Hyperplane arrangements and applications, PIMS, Vancouver, 2011年8月8日--12日.
• 直線配置のトポロジー, 京都大学談話会, 2011年6月22日.
• Minimal Stratifications for Line Arrangements. (Slide (PDF) from Pisa Talk )
  • 広島大学 トポロジー・幾何セミナー, 広島大学, Nov. 15, 2011.
  • Singularity Theory Conference, University of Science and Technology of China, Hefei, July 25--31, 2011.
  • Tuesday Seminar on Topology, The University of Tokyo, May 24, 2011.
  • The 6th Kagoshima Algebra-Analysis-Geometry Seminar, Kagoshima University. Feb 13--17, 2011.
  • Workshop on Geometry and Analysis of Discriminants, IPMU, Feb 7--8, 2011.
  • Combinatorial and Geometric aspects of Hyperplane Arrangements, Centro di Ricerca Matematica ``Ennio De Giorgi'' Pisa, May 25, 2010.
• On the irreducibility of moduli spaces of line arrangements. (Slides from talk at Northeastern, Boston. Apr. 8 2011.)
  • The Algebraic Geometry and Topology of Hyperplane Arrangements, Northeastern University, Boston, April 8, 2011.
  • Branched Coverings, Degenerations, and Related Topics, Tokyo Metropolitan Univ., Mar. 7--10, 2011. ,
  • Topology of singularities and related topics, II, Tohoku University, January 5 - 9, 2011.
• 周期と実数の計算論的複雑性について (Slide (PDF File) from Shinshu Talk Oct. 16 2009.)
  • 東京理科大学理工学部数学科談話会, January 12, 2011.
  • Workshop "Category Theory, Computer Science and Topology, 信州大学, October 18, 2009.
  • 大阪大学整数論＆保型形式セミナー, October 16, 2009.
• On the free arrangements and truncated affine Weyl arrangements.
  KAIST Discrete Math Seminar, KAIST, Daejeon, Korea, 2010年10月26日. (Video)
• Modules of logarithmic derivations and applications to enumerative problems of hyperplane arrangements.
  2010 Global KMS International Conference, POSTECH, Korea, Oct 22, 2010
• Minimal presentations for the fundamental groups of the complement of hyperplane arrangements.
  • Interplay between representation theory and geometry, Beijing, China, May 3-7, 2010. Scanned Note,
  • SEMINARIO DI GEOMETRIA, Universita di Pisa, Italy, April 15, 2010.
  • Topology of Singularities and the related geometry, Hanoi, March 23, 2010.
• 超平面配置のトポロジー：極小セル分割とその周辺 Slide PDF
  北海道大学談話会, 北海道大学, Feb 18, 2010.
• Orlik-Solomon 代数と青本複体の Chamber 基底
  超幾何方程式研究会 2010, 神戸大学, Jan 7, 2010. (MPEG files: 1(415MB), 2(91MB) )

• 観察から始まる数学---巡回篩現象入門, ガロア祭, 京都大学理学部, May 27, 2011. (講演ファイル)