Talks

2012

• Wild Ramification and the Cotangent Bundle, notes
  • 25/01/13 KIAS number theory seminar 3:40pm - 4:40 pm
  • 20/02/13 IPMU Colloquium (Interdisciplinary) 15:30 - 17:00 video
  • IHES Seminaire de mathematiques 13 mars 2013 a 14h30 notes
  • ENS a Lyon, Mardi 19 mars 2013 14h30
  • PANT (Pan Asia Number Theory) conference, VIASM, July 22-26
• The second Stiefel-Whitney classes of l-adic cohomology notes
  Orsay, Mardi 26-03-2013, 16:00:00, salle 113-115, bat. 425
• The monodromy weight conjecture and perfectoid spaces (after Peter Scholze)
  VIASM Annual Meeting 2013, Hanoi, July 20-21, 2012.

2012

• A Riemann-Roch formula for l-adic sheaves on varieties over a local field (joint work with K. Kato), Geometric Langlands seminar, University of Chicago, 2012 Jan. 16 16:30-18:00
• Discriminant and determinat of a hypersurface of even dimension, Number theory seminar, University of Chicago, 2012 Jan. 18 14:30-16:00
  Arithmetic and Algebraic Geometry 2012 Univ. of Tokyo, 2012 Feb. 17, 11:20-12:20
• Introduction to wild ramification of schemes and sheaves, resume, final version of lecture notes (updated on 12/04/01),
  • Arizona Winter School 2012: Ramification and Geometry March 10-14, 2012, University of Arizona in Tucson
  • Uni Padova March 19-30, 2012
• The second Stiefel-Whitney class of l-adic cohomology, note
  Galois Representations and Arithmetic Geometry, Institut de Mathematiques de Bordeaux, 15:15-16:15, July 11 2012.

2011

• l進コホモロジーのStiefel-Whitney類、 東北大学代数幾何セミナー、 1月14日(金) 13:30-15:00、 数学棟 208号室 ノート
• Wild ramification of schemes and sheaves, Arithmetic and Algebraic Geometry 2011 Jan. 18-22.
• 中央大学数学科談話会 フェルマーの最終定理 ー その証明の主役たち 4月22日(金) 16時30分から17時30分 中央大学後楽園キャンパス６号館３階 6302教室
• 7/27(水) 16:00-17:00 Discriminants and determinant of a hypersurface of even dimension,
  代数学コロキウム 123教室
• 多変数多項式の終結式と判別式 仙台シンポジウム 8/1 (月) 16:10〜17:25 ノート
• 偶数次元の超曲面の判別式と行列式 仙台シンポジウム 8/2 (火) 16:15〜17:15 ノート
• Discriminant and determinant of a hypersurface of even dimension (joint work with J-P. Serre) Une apres-midi de Geometrie Arithmetique a l'IHES 12 septembre, 2011 16h45-17h45. photos
• Second Stiefel-Whitney class of l-adic cohomology, Geometrie Arithmetique et motivique, CIRM, 19 septembre 2011, 17h-18h. notes.
• Discriminant and the determinant of a complete intersection, Okinawa Shogaku, 10:00-11:20, Oct. 10, 2011, Workshop on arithmetic geometry 2011 notes.
• Discriminant and determinant of a hypersurface of even dimension (joint work with J-P. Serre), 2011 Japan-Taiwan Mini workshop on Arithmetic Algebraic Geometry and related topics, Nov. 17-19.

2010

• An l-adic Riemann-Roch formula (joint work with Kazuya Kato),
  • Conf. in honor of Jean-Marc Fontaine, IHP, March 25, 16h30-17h30, notes
  • Regulator III, Barcelona, July 20, 15h30-16h30 notes
  • 代数的整数論とその周辺 数理研 2010年12月6日(月) 16:10-17:00 pdf.
• Hasse-Arf theorem in higher dimension,
  Galois rep'ns in arithmetic and geometry, Goa, August 11, 11h30-12h30. notes
• Wild ramification of schemes and sheaves,
  • ICM, Hyderabad, August 27, 16:00-16:45, slides
    manuscript for proceedings References to add
    • Ramification and cleanliness, with Ahmed Abbes, arXiv:1007.3873
    • Ramification theory for varieties over a local field, with Kazuya Kato, arXiv:1007.0310
    Correction : r_i is missing in the defining equation of CC(F) in page 18.
  • PANT, Kyoto, September 17, 13:30-14:30 slides
  • Witt vectors, foliations, and absolute de Rham cohomology Nagoya 2010 Nov 24, 16:30-17:30
  • Seoul-Tokyo Conference on Arithmetic and Algebraic Geometry KIAS 2010 Nov. 26, 11:30-12:30

2009

• 分岐理論の現状と展望 １月１３日(火) 数論幾何における分岐(神戸フルーツフラワーパーク) 三枝氏のノート(pdf 1.7MB)
• Tamely ramified coverings, 5/28 Thu, Workshop on arithmetic geometry at Tambara.
• Local Fourier transform and epsilon factors, (Rennes, July 10, Journees arithmetiques de Rennes, July 6-10, Univ. de Rennes)
• Characteristic cycle of an l-adic sheaf (Tsinghua, Beijing, August 19, East Asia number theory conference, Aug. 19-22, Tsinghua Univ.)

2008

• Local Fourier transform and epsilon factors, arithmetic side (Tambara (June 29, Workshop on Arithmetic and Algebraic Geometry))
• Local Fourier transform and epsilon factors, (pdf Tokyo (July 3))

2007

• Wild ramification and the characteristic cycle of an l-adic sheaf, (pdf Chicago (March 14), Toronto (March 23))
  (pdf Tokyo (April 11 16:30), Villetaneuse (8 juin 17h), Oberwolfach (June 17), Kyoto (june 27), Rennes (5 juillet 10h30))
• Conductor formula for l-adic sheaves (Chevalret 11 juin 15h30 see pdf)
• Automorphic forms and l-adic representations 4 (Luminy July 13, 11:00-) pdf revised on 08/07/30
• 局所体の分岐群について， 九州大学 10月19日 16:00-17:00 pdf

2006

• Galois representations and modular forms. July 17-22, IHES. ps pdf.
  expanded version ps pdf for proceedings revised on (08/08/21)
• l進層の特性類と分岐、 8月7日、東大. (in Japanese) ps pdf (改訂版はこちら ps pdf)
• Ramification of schemes over a local field (joint work with K. Kato). ps pdf September 4 at El Escorial, September 13 at RIMS.

2005

• Characteristic class and Swan class of an l-adic sheaf. Mar. 16, Johns Hopkins, JAMI.
• The characteristic class and ramification of l-adic sheaf (joint works with Abbes and with Kato). June 20, Oberwolfach.
• Ramification theory of schemes in mixed characteristic case (joint work with K. Kato). June 28, Orsay.
• Upper numbering filtration of ramification groups. (joint work with A. Abbes). July 8, Strasbourg
• Characteristic class and microlocal analysis on an l-adic etale sheaf (joint work with A. Abbes). August 15, Tianjin

2004

• Euler-Poincare characteristic of l-adic sheaves on a variety of characteristic p>0. Jan. 23 Tokyo, July 29 Durham, Oct. Cambridge.
• Galois representations in arithmetic geometry. Oct. 19. Kuwait lecture at Cambridge
• 高次元のスキームにおける分岐 (加藤和也氏との共同研究) １２月９日 京大数理研 「代数的整数論とその周辺」
• Characteristic class and Swan class of an l-adic sheaf. Dec. 20, Univ. of Tokyo.