Talks
2025
- Singular supports and characteristic cycles (part 2),
Taiwan National University,
February 10, 12, 17, 19, 15:30-16:20, 16:30-17:20.
-
Tokyo-Lyon, March
-
Coloss, March Lyon
2024
-
On relative singular support in mixed characteristic
-
数論幾何学とその周辺, Tokyo Denki University,
2024年5月28日 11:20-12:20
-
Regulators V, Pisa,
June 13, 10:00-11:00
-
Arithmetic Geometry, Algebraic Geometry and Analytic Geometry,
7月3日, 15:15-16:15
-
Séminaire de géométrie arithmétique
Amphithéâtre Léon Motchan (IHES)
Jeudi 19 septembre 2024 de 11h à 12h30
notes
- Singular supports in positive and mixed characteristics
Oct. 4, 2024,
notes,
report,
Oberwolfach, Anabelian Geometry and Representations of Fundamental Groups
-
On the Hasse-Arf theorem.
-
p-adic cohomology and arithmetic geometry,
October 25, 9:30-10:30
-
第20回北陸数論研究集会 12月6日(金)
金沢大学角間キャンパス
10:00-11:00
- Singular supports and characteristic cycles (part 1),
Taiwan National University,
November 18, 20, 25, 27, 15:30-16:20, 16:30-17:20.
2023
-
On the Hasse-Arf theorem.
-
Arithmetic Geometry,
September 18, 15h30-16h30,
notes
-
第19回北陸数論研究集会 「超幾何関数の数論とその周辺」
11月25日 9:30-10:30
notes
2022
-
Upper ramification groups of local fields with imperfect residue fields,
Monday, May 30, 2022,
9h-10h,
10h05-11h05,
Tuesday, May 31, 2022,
11h30-12h30
Franco-Asian Summer School on Arithmetic Geometry
May 30 - June 3, 2022
Centre International de Rencontres Mathématiques (CIRM), Luminy, France
notes
-
余接空間と局所体の分岐群
12/23(金)16:00--17:00
九大代数学セミナー
九州大学伊都キャンパス
ノート
2021
2020
-
Wild ramification and the cotangent bundle in mixed characteristic
-
Graded Quotients of Ramification Groups of a Local Field with Imperfect Residue Field,
2019
- CC,
Wild Ramification and Irregular Singularities, Sep 25 Wednesday 9:00--10:35, 2019 at IMPAN in Warsaw, Poland
-
Etale Cohomology and the Characteristic Cycle
15:00-16:00 September 6, 2019,
BICMR notes
-
Ramification groups of a local field (with Ahmed Abbes and Kazuya Kato),
September 5 (Thu), 10:00-11:30, CAS, Beijing.
notes
-
Characteristic cycle of a constructible sheaf,
Arithmetic Geometry in Carthage,
Summer School, Tunisian Academy Beit al-Hikma, Carthage, Tunisia
Thursday, June 20, 10h-11h, 11h15-12h15, Friday, June 21, 10h-11h, 2019,
notes typed
manuscript
-
Characteristic cycle of an l-adic sheaf,
2018
-
Characteristic cycle of an l-adic sheaf,
-
Characteristic cycles and the conductor of direct image,
-
Characteristic cycle of constructible sheaves
and restriction to curves.
-
Characteristic cycle of an étale sheaf and its functoriality
-
Purdue University, September 24-28
2017
-
Characteristic cycle of an l-adic sheaf,
-
Characteristic cycles and the conductor of direct image,
2016
-
The characteristic cycle and the singular support of an etale sheaf,
Conference on Algebraic Number Theory,
TSIMF Sanya,
January 17, 2016, 9:00-10:00,
notes.
-
On the characteristic cycle of a constructible sheaf,
-
SAGA Orsay,
22/03/16, 14h15-15h15,
notes.
-
Tokyo-Seoul at KIAS,
June 16-17, 10:00-10:50,
notes.
-
PANT
Characteristic cycle of a constructible sheaf,
July 13 9:00-9:45, Academia Sinica in Taipei.
-
On the functoriality of characteristic cycles of constructible sheaves,
Hakodate workshop on arithmetic geometry 2016.
Hakodate arena.
June 1 11:15-12:15
notes.
-
l進層の特性サイクル,
数学会総合分科会,特別講演,
関西大学,9月17日(土)
16:40-17:40
pdf.
2015
-
The characteristic cycle and the singular support of an etale sheaf,
-
Arithmetic and Algebraic Geometry (Shioda 75),
UTokyo, School of Math. Sci., Lecture hall,
January 31, 2015, 11:20-12:20,
notes.
-
Séminaire Théorie des Nombres,
Institute de Mathématique de Bordeaux,
mars 20, 2015, 14h00-15h00
notes.
-
Arithmetic Algebraic Geometry,
May 15, 2015, 9:30-10:30
notes.
-
Nordic Number-theory Network,
Copenhagen June 16, 13:15-14:05.
-
Géométrie arithmétique, théorie des
représentations et applications,
24 juin 2015, 10h30-11h30.
-
Guest seminar,
Freie Universität Berlin,
June 30 12:30-14:00
16:00-17:30,
July 2 14:15-15:45,
July 7 12:00-13:00
notes,
notes taken by
Lars Kindler.
-
AMS algebraic geometry summer institute,
July 27, 2015, 3:20-4:10.
notes
2014
-
l 進層の分岐と特性多様体、
第三回九州合同セミナー
2014 年 1 月 11 日(土) 16:00 --17:00
佐賀大学 DC棟 1 階 講義室
ノート
-
Characteristic cycles of
a constructible sheaf on a surface,
-
Arithmetic and Algebraic Geometry 2014,
東大数理大講義室
2014年1月29日(水)10:00--11:00
ノート1,
ノート2
-
Conference on Motives and Galois groups on the occasion of Uwe Jannsen's 60th birthday, March 12 14:00-15:00, 2014, University of Regensburg.
-
Geometry & Arithmetic of Surfaces,
March 18 10:00-11:00, 2014
LMU & TU Munich
-
集中講義
l 進層の分岐と特性多様体、
大阪大学理学研究科
2014年5月12日(月)--16日(金)
ノート
-
「l進層の特異台と特性サイクル」
数論幾何学セミナー
場所 北海道大学理学部3号館,
7/17(3-307) 10:00-12:00, 14:00-16:00,
7/18(3-205) 10:00-12:00, 14:00-16:00
resume
-
On the characteristic cycle of an l-adic sheaf,
Journees de géométrie arithmétique de l'IHÉS
25-26 septembre 2014 IHÉS,
25 10h30-11h30, 14h00-15h00,
26 10h30-11h30.
resume,
detailed resume,
notes,
video.
-
The characteristic cycle and the singular support of an etale sheaf,
Workshop of arithmetic geometry in Tohoku,
October 30, 2014. 13:30-14:20.
notes.
2013
-
Wild Ramification and the Cotangent Bundle,
notes
-
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)
notes
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
notes
taken by Bruno Chiarellotto.
Disclaimer. The contents are not checked
and there can be some mistakes.
-
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¥UTF{FF5E}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¥UTF{FF5E}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
2004