## 無限可積分系メーリングリスト

Documents of past years : 2017 | 2016 |
2015 | 2014 | 2013 | 2012 | 2011 | 2010 | 2009 | 2008 | 2007 | 2006 |
2005 | 2004 | 2003 | 2002 | 2001 | 2000 | 1999 | 1998 | 1997 | 1996


International Symposium "Rikkyo MathPhys 2018"

また，会場も昨年度までとは別の建物となっています。

Babak Haghighat (Tsinghua University)
Yasuaki Hiraoka (Tohoku University)
Yu-tin Huang (NTU)
Ivan Ip (Kyoto University)
Katsushi Ito (Tokyo Institute of Technology)
Kohei Iwaki (Nagoya University)
Norio Konno (Yokohama National University)
Tatsuhiro Misumi (Akita University)
Daisuke Yamakawa (Tokyo Science University)
Masahito Yamazaki (Kavli IPMU)

をご覧いただければ幸いです。

なお、準備の都合上、参加ご希望の方は、上のURLのフォームにて、
お名前、所属等をお知らせくださるようお願い申し上げます。
3月13日に懇親会を予定しております。

----------------------------------------------------------------------------

Ikenmeyer さんはこの方面でもっとも活躍されている研究者の一人ですが，数学・

GCT Seminar at Univ. Tokyo
Speaker: Christian Ikenmeyer (Max-Planck-Institut für Informatik)
"Representation theory and algebraic geometry in geometric complexity theory"
Date: Tuesday, March 6, 14:00 - 15:00
Venue: Graduate School of Math Sciences, Univ. Tokyo, Room 126.

GCTセミナー＠東京大学数理

"Representation theory and algebraic geometry in geometric complexity theory"

なお，この後，

Computation Theory -- Geometric Complexity Theory and Related Topics —，

でも集会・セミナーが予定されています．下記添付ファイルをご覧下さい．

*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*

Kyo Nishiyama

〒252-5258 相模原市中央区淵野辺 5-10-1
研究室: L棟5階 L513
Tel. 042-759-6269  Fax. 6532
http://www.gem.aoyama.ac.jp/~kyo/
*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*.*

****************

Workshop on Mathematics in Computation Theory
-- Geometric Complexity Theory and Related Topics --

Date: March 7—9 2018.
Place: 東北大学情報科学研究科研究棟

Supported by Grant-in-Aid for challenging Exploratory Research 17K19954

Program
March 7 (Wed) 　情報科学研究棟2階中講義室（一部　大講義室に変更の可能性あり）
10:15 Opening and Introduction
Takeshi Tokuyama (Tohoku University)
10:30 -12:00
Christian Ikenmeyer (MPII, Germany)
"Geometric complexity theory: An ambitious approach towards P versus NP"
12:00—13:30 Lunch Break
13:30 – 15:00
Satoru Iwata (U. Tokyo)
Matroid Parity Problems (tentative title)
15:00- 15:30 Break
15:30 –16:00
Takeshi Tokuyama (Tohoku U)
Enumeration on Squared Ice model
16:00- 17:00
Matias Korman　（Tohoku U）
Title TBD
Andre van Renssen (NII)
Title TBD

March 8 (Thr) 　情報科学研究科研究棟2階中講義室
10:00- 12:00
Discussion and work together.
13:00 -14:00
Christian Ikenmeyer (MPII)
"Representation theory and algebraic geometry in geometric complexity theory"
14:00-14:30
Break
14:30—16:00
TBD

March 9
10:00---12:00  情報科学研究科研究棟8階演習室
Discussion about future plan of GCT project
Contact: Takeshi Tokuyama (tokuyama  AT  dais.is.tohoku.ac.jp)

よろしくお願いします。

———————

Speaker: Takahiro Nagaoka (Kyoto U)
Date & Place: February 23trd 2018 (Fri) RIMS room 402 16:30–18:00
Title : The universal Poisson deformation space of hypertoric varieties.

Hypertoric variety $Y(A, \alpha)$ is a (holomorphic) symplectic variety,
which is defined as Hamiltonian reduction of complex vector space by torus
action. By definition, there exists projective morphism $\pi:Y(A, \alpha) \to Y(A, 0)$, and for generic $\alpha$, this gives a symplectic resolution
of affine hypertoric variety $Y(A, 0)$. In general, for conical symplectic
variety and it's symplectic resolution, Namikawa showed the existence of
universal Poisson deformation space of them.  We construct universal Poisson
deformation space of hypertoric varieties $Y(A, \alpha)$, $Y(A, 0)$.  We
will explain this construction and concrete description of Namikawa-Weyl
group action in this case. If time permits, We will also talk about some
classification results of affine hypertoric variety. This talk is based on
my master thesis.

みなさま

お誘い合わせの上ご参加下さい。

---------------

Title: Topological phases and anomalies in relativistic quantum field theories

と思う。
Abstract: In the recent years, we have seen a great development in the
understanding of topological phases and anomalies in the context of condensed
matter physics. These new insights can also be usefully applied to the study
of quantum field theory on the high energy physics side. In this lecture we
will give a very elementary review of this subject.

10:00--11:30（90分）　講義
11:30--13:00（90分）　お昼休み
13:00--14:30（90分）　講義
14:30--14:45（15分）　休憩
14:45--16:15（90分）　講義
---------------

（重複してお受け取りの際はご容赦ください）

Algebraic and Enumerative Combinatorics in Okayama (AECO)
Date: February 19 - 23, 2018.
の懇親会を 2 月 20 日（火）に開催するとお伝えしましたが、都

日時：2 月 21 日（水）18:30 〜 20:30
場所：リーセントカルチャーホテル 4F ベネチア
料金：5,500 円（飲み物：ビール・日本酒・ソフトドリンクを含む）
と変更させていただきたいと思います。直前の変更で申し訳ありま
せん。（なお、場所、料金には変更ありません。）

ありますので、参加を希望される方は、2 月 17 日（土）までに、
nu+okayama2018  AT  shinshu-u.ac.jp
まで、参加希望の旨をお知らせください。また、菜食主義、アレル
ギーなどの要望がございましたら、一緒にお知らせください。

--------------------< 返信フォーム >--------------------

2 月 21 日の懇親会   参加

(                         )
--------------------------------------------------------

また、代わりに Conference Lunch を
日時：2 月 20 日（火）12:00 〜 13:00
場所：Terrace Cafe（岡山大学構内）
に行います。こちらは前日の 2 月 19 日 (月) に希望を取ります
ので、到着が遅れる方はメールを頂けたら幸いです。

だければば幸いです。

Ian Le氏によるセミナーも行われます。

よろしくお願いします。

——————————————

Date & Place: February 16th 2018 (Fri) RIMS room 402 15:45–16:45
Title : An introduction to higher Teichmuller theory

Abstract : I will speak about recent joint work with Alexander Shapiro in
which we develop a cluster realization of the quantum group U_q(sl(n))
using quantized moduli spaces of framed local systems on marked surfaces.
I will also discuss the notion of a positive representation of a quantum
cluster algebra, and explain how the positive representations of U_q(sl(n))
introduced by Frenkel and Ip can be studied in the cluster algebra framework.
——————————————

Speaker: Alexander Shapiro (UC Berkeley)
Date & Place: February 16th 2018 (Fri) RIMS room 402 17:00–18:00
Title : An introduction to higher Teichmuller theory

Abstract :Igor Frenkel and Ivan Ip conjectured that positive representations
of quantum groups are closed under tensor products. This conjecture happens
to be closely related to the so-called modular functor conjecture by Fock and
Goncharov. I will speak about joint works with Gus Schrader (some of which are
works in progress) where we prove the above conjectures.

よろしくお願いします。

———————
Speaker: Ian Le (Perimeter Institute)
Date & Place: February 16th 2018 (Fri) RIMS room 402 14:00–15:30
Title : An introduction to higher Teichmuller theory

Abstract : Let S be a topological surface. Teichmuller space parameterizes
the different ways of giving S the structure of a Riemann surface.
Uniformization tells us that any Riemann surface can realized as a quotient
of the upper-half-plane by a subgroup of PSL(2,R). Thus Teichmuller space
to be viewed as a space of representations of the fundamental group of S
into PSL(2,R). We will explain how cluster algebras and the theory of total
positivity give an approach to Teichmuller theory which recovers classical
ideas (like hyperbolic geometry, measured laminations, and quadratic
differentials) while also permitting a generalization to PSL(n,R).

お知らせいたします：
http://www.ms.u-tokyo.ac.jp/~noboru/knot_alg_geom2018.html

=========

noboru[at]ms.u-tokyo.ac.jp

（[at]を@に変えてください。）
=========

# 重複して受け取られた場合はご容赦ください。

（参加登録は不要です。）

Pramod Achar
Shun-Jen Cheng
Terry Gannon
Naoki Genra
Yi-Zhi Huang
Yasuyuki Kawahigashi
Toshiro Kuwabara
Ching Hung Lam
Martina Lanini
Shotaro Makisumi
Fedor Malikov
Antun Milas
Masahiko Miyamoto
Sven Möller
Takahiro Nishinaka
Ryo Sato
Bailin Song
Anne Taormina
Yongchang Zhu

１６：００までに終了する予定です。

Organizers:
Tomoyuki Arakawa
Peter Fiebig
Nils Scheithauer
Katrin Wendland
Hiroshi Yamauchi

-- Patricio Gallardo and Sara Muhvic -- Mar 6, 2018

Dear all,

I would like to announce the following 2 Mathematics and String theory
seminars at Kavli IPMU.

1) Speaker: Patricio Gallardo (U of Washington)
Date:  Tue, Mar 06, 2018, 13:30 - 15:00
Place:  Seminar Room A

Title:  On double covers and their degenerations

Abstract: We discuss different compactifications of the moduli space of smooth
plane curves, explicit descriptions of the singular objects they parametrize,
and applications for understanding the degenerations of double covers
branching along them.

2) Speaker: Sara Muhvic    (Warwick U)
Date:  Tue, Mar 06, 2018, 15:30 - 17:00
Place:  Seminar Room B

Title: G-Hilb and crepant resolutions of certain abelian orbifolds
in dimension 4

Abstract: Let G \subset Sl(4,\CC) be a maximal diagonal subgroup of exponent r.
In this talk, I will describe the G-Hilbert scheme G-Hilb(C4) through its toric
fan and show how it can be used to construct "special" crepant resolutions of
the quotient variety \CC^4/ G. I will also discuss whether these crepant
resolutions could be interpreted as the moduli spaces \mathcal{M}_\theta of
\theta-stable G-constellations.

-----------------------------
Todor Eliseev Milanov
Associate Professor
Kavli IPMU, Japan

http://www.tfc.tohoku.ac.jp/event/4200.html
について、第一報をお送りします。

----

Koji Hasegawa at Mathematical Institute, Tohoku University, Sendai JAPAN

※ 重複して受け取られた場合は，ご容赦ください．

----------------------- Original Message -----------------------
Dear professor Sagaki,

I am writing to inform you about our upcoming workshop and conference
"Interactions of quantum affine algebras with cluster algebras, current
algebras and categorification", in honor of Vyjayanthi Chari's 60th birthday.
It will be held at the Catholic University of America, Washington DC,
from June 2 to June 8. Further details can be found at

https://quantumaffine2018.catholic.edu

Registration is now open (see https://quantumaffine2018.catholic.edu/
QAAREGISTRATION.html).

We would greatly appreciate if you could circulate the news/website with any
of your colleagues, students and postdocs interested in representation theory.

The conference is partially funded by the NSF and some travel support will be
available for participants, with the priority given to graduate students,
and persons from group which are underrepresented in mathematical sciences are
particularly encouraged to apply. The deadline for funding applications is
April, 15.

Sincerely,
Jacob Greenstein

--------------------- Original Message Ends --------------------
Daisuke SAGAKI
Division of Mathematics
Faculty of Pure and Applied Sciences
University of Tsukuba
Tsukuba, Ibaraki 305-8571, Japan

みなさま

ぜひご参加いただければと思います．

--

お手数ですが事前に福田 (afukudaあっとshibaura-it.ac.jp) まで

プログラム：
14:00-15:30

ちょっと変わった楕円函数（論）とその応用

16:00-17:30

18:00-19:00
フリーディスカッション

なおセミナー終了後に講演者を交えて懇親会を開く予定です。

ご連絡ください。

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

おりました。訂正とお詫びを申し上げます。

【誤】
nu+okayama2018  AT  shinsyu-u.ac.jp.

【正】
nu+okayama2018  AT  math.shinshu-u.ac.jp

We are sorry that I cited a wrong email address in my last email:
Our email address is nu+okayama2018  AT  shinsyu-u.ac.jp.

Our correct email address is nu+okayama2018  AT  math.shinshu-u.ac.jp.

Algebraic and Enumerative Combinatorics in Okayama (AECO)

Date: February 19 - 23, 2018.
Place: Graduate School of Natural Science and Technology, Building No.1.

つきましては、ホテル側の要請で３日前までに懇親会参加者数を

nu+okayama2018  AT  shinsyu-u.ac.jp.

Dear participants,

The participants do not need any registration to attend this conference.
However, we need to know the number of people who attend
the banquet which will be held on February 20:

Date:February 20 (Tue) 18:00 - 20:00
Place:Recent Culture Hotel, 4F, Room Venetia
Food:Japanese cuisine
Price:5,500JPY (including beer, Japanese sake and nonalcoholic drinks)

If you would like to attend the banquet, please let us know
by email before February 16 (Fri). The hotel request us to fix the number
of attendants to the banquet 3 days before it.
If you have special demands, for example, vegetarian foods,
Halal foods or special allergy, please tell us your request by email.
Our email address is nu+okayama2018  AT  shinsyu-u.ac.jp.
We are very glad if this banquet stimulates the discussions between
participants.

Best regards,

Masao Ishikawa (Okayama University)

--
Masao Ishikawa
Department of Mathematics, Faculty of Science, Okayama University

=========

noboru[at]ms.u-tokyo.ac.jp

（[at]を@に変えてください。）
=========

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

Algebraic and Enumerative Combinatorics in Okayama (AECO)

Date: February 19 - 23, 2018.
Place: Graduate School of Natural Science and Technology, Building No.1.

つきましては、ホテル側の要請で３日前までに懇親会参加者数を

nu+okayama2018  AT  shinsyu-u.ac.jp.

Dear participants,

The participants do not need any registration to attend this conference.
However, we need to know the number of people who attend
the banquet which will be held on February 20:

Date:    February 20 (Tue) 18:00 - 20:00
Place:    Recent Culture Hotel, 4F, Room Venetia
Food:    Japanese cuisine
Price:    5,500JPY (including beer, Japanese sake and nonalcoholic drinks)

If you would like to attend the banquet, please let us know
by email before February 16 (Fri). The hotel request us to fix the number
of attendants to the banquet 3 days before it.
If you have special demands, for example, vegetarian foods,
Halal foods or special allergy, please tell us your request by email.
Our email address is nu+okayama2018  AT  shinsyu-u.ac.jp.
We are very glad if this banquet stimulates the discussions between
participants.

Best regards,

Masao Ishikawa (Okayama University)

--
Masao Ishikawa
Department of Mathematics, Faculty of Science, Okayama University

いました。正しくは
です。申し訳ありません。
どうぞよろしくお願いいたします。

Algebraic Lie Theory and Representation Theory 2018について、アナウンス
させて頂きます。

この研究集会は、2014年度まで「代数群と量子群の表現論研究集会(RAQ)」として運営され
てきたものを、研究対象を広げる意味で2015年度からタイトルを変えて開催しています.

に概説講演をお願いしました。

つきましては、3月末を締切として、一般講演を募集致します。もちろん、大学院生による

ォームをご利用下さい。また、他薦の場合は、下記の世話人のメールアドレスまで直接お

どうぞよろしくお願い致します。

Higher Structures and Quantisation -- March 20-22, 2018

Dear all,

I would like to announce a series of lectures on Higher structures and
quantisation at Kavli IPMU organised by Andrew Macpherson. The invited
speakers are Bertrand Toen, Gabriele Vezzosi, Aaron Mazel-Gee, and
Isamu Iwanari. For more details and precise schedule please refer to
the conference webpage

http://www.stashproject.org/conf.html

The webpage has a link with a Doodle pole for registration. It is not
necessary, but it would be very helpful if those who are planning to
attend register.

-----------------------------

Todor Eliseev Milanov
Associate Professor
Kavli IPMU, Japan

クロスポストご容赦ください．

------------------------------------

【1件目】

URL：http://www.ms.u-tokyo.ac.jp/seminar/infana/index.html

サイン二乗変形(SSD)とは、量子系のハミルトニアンの局所的エネルギースケールを、
サイン二乗関数にしたがって空間的方向に変調させる変形操作である。SSDにより、一様

ハミルトニアンへと変形される。しかしながら、空間次元１次元で系が臨界的な場合には、
この変形後のハミルトニアンの基底状態は、変形前の一様周期的な基底状態からほとんど

スピン鎖や横磁場Ising模型においては、両者の基底状態が厳密に一致することを示して
いる[1,2,3]。また、ディラック・フェルミオン系や一般の(1+1)次元の共形場理論につい
ても、適切にSSDを定義すれば、やはり一様周期系とSSD系の基底状態が一致するという

の結果についても紹介する。

[1] H. Katsura, J. Phys. A: Math. Theor. 44, 252001 (2011).
[2] H. Katsura, J. Phys. A: Math. Theor. 45, 115003 (2012).
[3] I. Maruyama, H. Katsura, T. Hikihara, Phys. Rev. B 84, 165132 (2011).
[4] K. Okunishi and H. Katsura, J. Phys. A: Math. Theor. 48, 445208 (2015).
[5] S. Tamura and H. Katsura, Prog. Theor. Exp. Phys 2017, 113A01 (2017).

【2件目】

URL：http://www.ms.u-tokyo.ac.jp/seminar/infana/index.html

よいクラスの頂点作用素超代数の表現の指標はモジュラー不変性という顕著な性質を示す．
この性質の応用として，中心電荷がc_{p,1} = 3(1-2/p)であるN=2頂点作用素超代数のフ
ュージョン則は，モジュラーS行列Verlinde公式によって計算されることが知られている
(p,p')を用いて中心電荷がc_{p,p’}:=3(1-2p’/p)と表わされる場合に，然るべき意味で
モジュラー不変性を示す新たなN=2頂点作用素超代数の表現族を紹介する．また，Creutzig
-Ridoutによって提案されたVerlinde公式の一般化を踏まえて，フュージョン則の計算へ
の応用を議論する．

------------------------------------

よろしくお願いします。

————————
Speaker: Myungho Kim (Kyung Hee University)
Date & Place: February 2nd 2018 (Fri) RIMS room 402 16:30–18:00
Title : Monoidal categorification of cluster algebras

Abstract : In this talk, I will explain our work on the monoidal
categorification of the quantum coordinate ring $A_q(n(w))$ of the unipotent
subgroup associated with a symmetric Kac-Moody algebra $g$ and an element
$w$ of the Weyl group. This is a joint work with Seok-Jin Kang,
Masaki Kashiwara, and Se-jin Oh.

The notion of monodical categorification of cluster algebras was introduced
by Hernandez and Leclerc: an abelian monodical category $C$ is called a
monodical categorification of a cluster algebra $A$ if the Grothendieck
ring of $C$ is isomorphic to $A$ and the cluster monomials of $A$ belong
to the classes of real simple objects of $C$.

The existence of a monodical categorification of a cluster algebra $A$
implies several nice properites of $A$ in a natural way, for example, the
positivity of the coefficients of the expansion of cluster monomials with
respect to an arbitrary cluster.

Our main result is that a subcategory $C_w$ of category of finite-
dimensional graded modules over the symmetric quiver Hecke algebra is a
monodical categorification of the (quantum) cluster algebra $A_q(n(w))$.

Combining the results of Khovanov-Lauda, Rouquier and Varagnolo-Vasserot,
we conclude that the cluster monomials of $A_q(n(w))$ belongs to the upper
global basis (dual canonical basis).  It answers the conjecture by Kimura
and Geiss-Leclerc-Schroer, which can be also regarded as a sharpened
version of a question asked by Fomin-Zelevinsky.

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
Dear colleagues,

The program and abstracts (the final version)
of the following conference is now available:

Algebraic and Enumerative Combinatorics in Okayama
http://www.math.okayama-u.ac.jp/~mi/comb2018/

Date: February 19 - 23, 2018.
Place: Graduate School of Natural Science and Technology Building No.1.
The N24 building in the Tsushima campus map:

http://www.math.okayama-u.ac.jp/~mi/comb2018/pdf/program.pdf
http://www.math.okayama-u.ac.jp/~mi/comb2018/pdf/abstracts.pdf

Access: Okayama University is 3km north to Okayama JR station.
Take Okaden Bus No.47 from the west exit of the station
and get off at the bus stop named West Gate of Okayama U.
(Okadai-Nishimon). The final destination of the bus is
Okayama University of Science which is NOT Okayama University.
It takes 7 minutes from the station to the west gate.

No registration is required to participate in this conference.
We welcome anybody to come and join in this conference,
which will make it very active and fruitful.
If you have any questions or requests, please feel free to

We are looking forward to seeing you in Okayama.

Masao Ishikawa (Okayama University)
--
Masao Ishikawa
Department of Mathematics, Faculty of Science, Okayama University

Tony Yue-Yu (Universite Paris-Sud) -- Feb 27, 2018

Dear all,

I would like to announce the following Mathematics and String theory seminar
at Kavli IPMU

Speaker: Tony Yue-Yu (Laboratoire de Mathematiques d'Orsay, Universite Paris-Sud)
Date:  Tue, Feb 27, 2018, 15:30 - 17:00
Place:  Seminar Room B

Title:  The Frobenius structure conjecture in dimension two

Abstract: The Frobenius structure conjecture is a conjecture about the
geometry of rational curves in log Calabi-Yau varieties proposed by
Gross-Hacking-Keel. It was motivated by the study of mirror symmetry.
It predicts that the enumeration of rational curves in a log Calabi-Yau
variety gives rise naturally to a Frobenius algebra satisfying nice
properties. In a joint work with S. Keel, we prove the conjecture in
dimension two. Our method is based on the enumeration of non-archimedean
holomorphic curves developed in my thesis. We construct the structure
constants of the Frobenius algebra directly from counting non-archimedean
holomorphic disks. If time permits, I will also talk about compactification
and extension of the algebra.

-----------------------------
Todor Eliseev Milanov
Associate Professor
Kavli IPMU, Japan

ちしております．

=======================================================

また，4次元の場合の最近の結果も報告する．
=======================================================

http://www.josai.ac.jp/education/gra_science/mathematics_major/（次行に続く）
workshop_seminar_lecture/seminar/seminar.html

ちしております．

=======================================================

ち上がるものを岡本ー坂井の初期値空間という．

また，4次元の場合の最近の結果も報告する．
=======================================================

http://www.josai.ac.jp/education/gra_science/mathematics_major/（次行に続く）
workshop_seminar_lecture/seminar/seminar.html

# いくつかの ML に投稿しております．
# 案内を重複して受け取られた場合はご容赦ください．

Finite Groups, VOAs, and Related Topics 2018

プログラムは以下の集会サイトよりご確認ください．

https://r.gnavi.co.jp/a538505/

*** 以下のフォームより事前に参加登録 *** をお願いいたします．

フォームからの登録がうまく行かない場合には，佐垣まで直接メールにて

sagakiあっとmath.tsukuba.ac.jp

になります．夕食会のみの参加も歓迎いたします．

--
Daisuke SAGAKI
Division of Mathematics
Faculty of Pure and Applied Sciences
University of Tsukuba
Tsukuba, Ibaraki 305-8571, Japan

ご興味のある方はご参集ください。

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
Dear colleagues,

A tentative program and abstracts of the following conference is now
available at http://www.math.okayama-u.ac.jp/~mi/comb2018/
The final program will come soon.

Algebraic and Enumerative Combinatorics in Okayama (AECO)

Date: February 19 - 23, 2018.
Place: Graduate School of Natural Science and Technology, Building No.1.
The N24 build of the Tsushima campus map at

Webpage: http://www.math.okayama-u.ac.jp/~mi/comb2018/

The aim of this conference is to allow participants an opportunity
to discusses recent developments and new ideas in
algebraic and enumerative combinatorics and related areas
such as representation theory, algebraic geometry and statistical physics.
Topics will include (but are not limited to):
plane partitions, P-partitions, alternating sign matrices,
perfect matchings, and symmetric functions.

Access: Okayama University (West Gate) is 7 minute distance
by Okaden No. 47 bus which departs from the west gate of
Okayama JR railway station. The conference will take place
at the second floor of the Graduate School of Natural Science
and Technology, Building No.1:

No registration is required to participate in this conference.
We welcome anybody to come and join in this conference,
which will make it very active and fruitful.
If you have any questions or requests, please feel free to

The Tsushima College residence is still available
at the rate 2800JPY/night. If you would like to stay
at the residence, please conatct us.
The Recent Culture hotel is the closest one to Okayama
University. You can walk to the conference (maybe 15 minutes).
It is available at 6800JPY/night if you tell them that
you will attend this conference at Okayama University.

We are looking forward to seeing you in Okayama.

Masao Ishikawa (Okayama University)
--
Masao Ishikawa
Department of Mathematics, Faculty of Science, Okayama University

======================================================

======================================================

****プログラム**************

1月19日（金）
13：30〜14：30 長尾 秀人（明石高専）
加法差分パンルヴェ方程式の超幾何型特殊解
15：00〜16：00 竹井 優美子（神戸大）
超幾何微分方程式の Voros 係数の位相的漸化式による表示
16：30〜17：30 関口 次郎（東京農工大）
３次元の一般化されたWDVV方程式の特殊解について

（18:30〜　懇親会）

1月20日（土）
09：30〜10：30 眞野 智行（琉球大学）
パンルヴェ方程式と平坦座標
11：00〜12：00 斎藤 恭司（東京大学IPMU）
原始形式の周期写像、鏡像対称性そしてBridgeland安定性条件の空間
13：30〜14：30 大山 陽介（徳島大）
q-超幾何級数の総和法
15：00〜16：00 鹿野 忠良（Institut Vercors）
Airy の浅水波が津波の正体である：津波の古典解析

Webサイト
http://math0.pm.tokushima-u.ac.jp/~ohyama/seminar.html
ポスター
http://math0.pm.tokushima-u.ac.jp/~ohyama/seminar/201801.pdf

■追記

http://math0.pm.tokushima-u.ac.jp/~ohyama/sato/index_sato_mikio.html
オンラインで読める論文はリンクしてあり、読めないものはCiNiiなどに
リンクして論文にアクセスしやすくしてあります。

---
〒770-8506　徳島市南常三島町2-1

R-matrices, Cluster Algebras, and Integrable Systems

First Announcement of IA18 Spring School:
R-matrices, Cluster Algebras, and Integrable Systems

ご案内をいたします。

Infinite Analysis 18 Spring School
R-matrices, Cluster Algebras, and Integrable Systems

Date: May 22(tue) - 24(thu), 2018
Place: Graduate School of Mathematics, Nagoya University

Lecturers:
Michael Gekhtman (Notre Dame)
Pavlo Pylyavskyy (Minnesota)
Rei Inoue (Chiba)
Naoto Okubo (Aoyama)

Organizers: Atsuo Kuniba (Tokyo), Tomoki Nakanishi (Nagoya),

Contact: Tomoki Nakanishi (nakanisiあっとmath.nagoya-u.ac.jp)

プログラムなどの詳細は以下のサイトで随時更新をいたしますので、ご覧ください。

Mauro Porta (University of Strasbourg) -- Feb 13, 2018

Dear all,

I would like to announce the following Mathematics and String theory seminar
at Kavli IPMU.

Speaker: Mauro Porta (University of Strasbourg)
Date: Tue, Feb 13, 2018, 13:15 - 14:45
Place: Seminar Room A

Title: HKR theorems in analytic geometry

Abstract: In this talk I will survey recent advances in derived geometry.
Building on the framework of derived analytic geometry introduced in my
thesis, I will explain how to obtain an S^1-equivariant version of the
Hochschild-Kostant-Rosenberg theorem for analytic spaces. Here analytic
means at the same time complex analytic and non-archimedean analytic,
and an analytic space is understood to be possibly singular (and, in fact,
possibly derived).
-----------------------------
Todor Eliseev Milanov
Associate Professor
Kavli IPMU, Japan

ご関心のある方はぜひご参加ください．

------------------------------------

Vertex algebras and topology.

1. Boson-fermion correspondence.Integrable representations of Lie algebra sl(2)^.
2. Monomial base in the integrable modules.Characters in the simplest cases.
3. Brion theorem for complex polytopes. Weyl character formula as a consequence
of Brion.
4. Rodgers-Ramanujan and Gordon identity as a consequence of Brion.
5. Constructions of vertex algebras.Exstensions of W-algebras.
6. Vertex algebras and 4-dimensional manifolds.
------------------------------------

++++++++++++++++++++++++++++++
2017年度 第９回セミナー

（これをWirtinger積分と呼ぶ）．この結果に触発されて講演者は積分表示の高次元化を

と因子配置のコホモロジーを調べる必要がある．このうち非常によく研究されてきたのは，

ものである．これに比べ，非有理的多様体上の因子配置についてはこれまであまり研究さ
れて来なかったのではないかと思われる．Wirtinger積分が楕円曲線上の点配置に関する

ので本講演ではそれを紹介したい．時間があればツイストホモロジー類の構成にも触れる

++++++++++++++++++++++++++++++

タイトル：

アブストラクト：
ヘッセンバーグ多様体は旗多様体の部分多様体であり，幾何・トポロジー・組み合わせ論・

るヘッセンバーグ多様体を観察してみると，その幾何やトポロジーは正則元の取り方によ
って大きく変わるようにも見えますが，実は共通する幾何学的な性質も持っています．こ
の講演では，正則ヘッセンバーグ多様体の族の性質を観察することで，何が共通する性質
なのかを説明したいと思います．また，応用として，旗多様体のホモロジーにおいて正則
ヘッセンバーグ多様体が定めるサイクルが正則元の取り方によらないことを見たいと思い
ます．この研究は，復旦大学の曽昊智さんと東京工業大学の藤田直樹さんとの共同研究で
す．

この度下記の通り紀尾井町数理セミナーを開催致します．

お待ちしております．

=======================================================

filtered regular D-module と filtered local systemの間の圏同値について解説し，

=======================================================

http://www.josai.ac.jp/education/gra_science/mathematics_major/workshop/index_copy2.html

また次回は

を予定しております．

Dear Colleagues,

It is our great pleasure to make the second announcement of the 13th edition
of the InternationalConference on Symmetries and Integrability of Difference
Equations (SIDE 13), during 11-17 November 2018, in Fukuoka, Japan.

Please post and/or circulate the attached announcement freely.

Yours Sincerely,
====================================================
Kenji Kajiwara, Chair, Organizing Committee of SIDE 13
Institute of Mathematics for Industry, Kyushu University
744 Motooka, Fukuoka 819-0395, JAPAN
====================================================

13TH INTERNATIONAL CONFERENCE ON SYMMETRIES AND INTEGRABILITY OF DIFFERENCE
EQUATIONS (SIDE 13)

SECOND ANNOUNCEMENT
7 January, 2018

Venue: JR Hakata City Conference Rooms, Fukuoka, Japan
Dates: Sunday 11 November (arrival day) to Saturday 17 November 2018
(departure day)

SIDE 13 is the thirteenth in a series of biennial conferences devoted to
Symmetries and Integrability of Difference Equations, and in particular to:
ordinary and partial difference equations, analytic difference equations,
orthogonal polynomials and special functions, symmetries and reductions,
discrete differential geometry, integrable discrete systems on graphs,
integrable dynamical mappings, (discrete) Painlevé equations, integrability
criteria, Yang-Baxter type equations, cluster algebras, difference Galois
theory, quantum mappings, quantum field theory on space-time lattices,
representation theory, combinatorics, numerical models of differential
equations, discrete stochastic models and other related topics.

The first SIDE conference took place in Estérel, Quebec, Canada, May 22-29,
1994. The event was so successful that it gave rise to the series of
conferences since held in the United Kingdom, Italy, Japan, France, Finland,
Germany, Australia, Bulgaria, China, India and Canada.

SIDE 13 will take place at JR Hakata City Conference Rooms, in Fukuoka, Japan,
from November 11, 2018 (arrival day) to November 17, 2018 (departure day).
JR Hakata City is located within JR Hakata Station in Fukuoka, and is just
five minutes travel from Fukuoka Airport by subway. Fukuoka is one of the
oldest historic cities in Japan and famous for its excellent local food.
Transportation to and from other major cities in Japan is frequent and
reasonably fast: there are more than 60 flights per day from Tokyo (1:30),
and more than 70 JR Shinkansen trains per day from Osaka (typically 2:30).

Organizing Committee

* Kenji Kajiwara (Chair, IMI, Kyushu University, Fukuoka)
* Saburo Kakei (Rikkyo University, Tokyo)
* Ken-ichi Maruno (Waseda University, Tokyo)
* Nozomu Matsuura (Fukuoka University, Fukuoka)
* Masatoshi Noumi (Kobe University, Kobe)
* Daisuke Takahashi (Waseda University, Tokyo)
* Tetsuji Tokihiro (University of Tokyo, Tokyo)
* Satoshi Tsujimoto (Kyoto University, Kyoto)
* Ralph Willox (University of Tokyo, Tokyo)
* Yasuhiko Yamada (Kobe University, Kobe)

* Frank Nijhoff (Chair, Leeds)
* Alexander Bobenko (TU Berlin)
* Lucia Di Vizio (Univ. de Versailles-St Quentin)
* Basil Grammaticos (CNRS, Paris VII)
* Rei Inoue (Chiba)
* Jarmo Hietarinta (Turku)
* Nalini Joshi (Sydney)
* Kenji Kajiwara (Kyushu)
* Decio Levi (Rome TRE)
* Vassilis Papageorgiou (Patras)
* Junkichi Satsuma (Musashino University)
* Wolfgang Schief (UNSW)
* Yuri Suris (TU Berlin)
* Claude Viallet (CNRS, Paris VI)
* Pavel Winternitz (CRM, Montreal)
* Da-jun Zhang (Shanghai University)

Scientific Committee

* Ralph Willox (Chair, Tokyo)
* Wolfgang Schief (UNSW)
* Lucia Di Vizio (Versailles-St Quentin)
* Decio Levi (Rome TRE)
* Satoshi Tsujimoto (Kyoto)
* Rei Inoue (Chiba)
* Takao Suzuki (Kinki University)

It is expected that the number of participants to the meeting will exceed
the number of available slots for talks and posters. The scientific committee
will therefore have to make a selection of proposed presentations. Applicants
will be informed of the decision of the scientific committee by August 10 2018.

In general, all talks will be allotted 30 minutes (including discussions).
A poster session will be organized and each presenter will have a short
two minute oral presentation to advertise the poster. Poster Awards will be
organized for students and early career researchers.

There will be no parallel sessions.

Instead of publishing proceedings we plan to arrange a book of abstracts
(1 page each in A4 size).

Important Dates

* Registration and submission opens May 1 2018
- Early bird registration deadline: September 15 2018
- Final deadline: September 30 2018
* Submission deadline for titles and abstracts: July 31 2018
- Notification of the result of each application: August 10 2018
* Financial support application deadline: June 15 2018
- Notification of financial support: July 15 2018

Registration Fee and Related Costs

* Registration fee: 30,000JPY (Until September 15 2018)
35,000JPY (After September 15 2018)
* Conference dinner: 8,000JPY
* Excursion: 2,000JPY

Accompanying persons will not be required to pay the registration fee.
However, if they choose to attend, the conference dinner and excursion will
be charged as above.

Accommodation

Currently, accommodation for participants has been secured in blocks at:
* Hyatt Regency Fukuoka (rates to be confirmed)
https://www.hyattregencyfukuoka.co.jp/en/
* Hakata Green Hotel No.1 10,000JPY
https://www.booking.com/hotel/jp/hakata-green-no-1-fukuoka.html
* Hotel Cliocourt Hakata 10,500JPY
https://www.booking.com/hotel/jp/clio-court-hakata.html?aid=330843;lang=en
* Reisenkaku Hotel Ekimae 7,700(6,700)JPY
* ANA Crowne Plaza Hotel Fukuoka 20,000JPY
* HakataEkimae SB Hotel (rates to be confirmed)
* Hotel Route-Inn Hakata Ekimae 9,000JPY
* Hotel Hokke Club Fukuoka 10,700(9,500) JPY
https://www.hokke.co.jp/english/fukuoka/
*JR Kyushu Hotel Blossom Hakata Chuo 10,100 (8,800) JPY (w double bed)
http://www.jrk-hotels.co.jp/en/Hakatachuo/
* Dukes Hotel Hakata (rates to be confirmed)
http://www.dukes-hotel.com/hakata/index.php

The above rates refer to single rooms with breakfast per night (w/o breakfast
inside the braces). Rooms with double bed or two beds will be available on
request.

The above rooms will be available through the online accommodation booking
system which will be prepared together with an online registration system by
the organizing committee. November is high season in Fukuoka and sometimes
it is difficult to book accommodation. For example, the Sumo (Japanese
traditional wrestling) tournament will be held in Fukuoka during November
11-25 which is expected to make the booking tight. It is highly recommended
to secure the booking sufficiently early if you would like to stay at other
hotels.

Financial Support

Limited financial support, mainly for early career researchers and students
giving presentations, will be available. The deadline of application will
be June 15 and the result will be notified July 15.

* Early Career Researchers: Researchers within five years after obtaining
their Ph.D degree, counted from May 1 2018.

Other information such as detailed submission guidelines will be given in
later announcements.

For further information, please see our website:
http://side13conference.net

JR Hakata City Conference Rooms:
http://www.jrhakatacity.com.e.bv.hp.transer.com/communicationspace/meetingroom/
(Chinese and Korean versions are also available from
https://www.jrhakatacity.com/translation/ )

For information on the SIDE series see:
http://side-conferences.net/

タイトル：Cluster algebra structures of the coordinate rings and crystal bases

アブストラクト：The coordinate rings of many varieties relevant to reductive
algebraic groups have special generators so-called cluster variables. A
commutative algebra generated by cluster variables is called a cluster algebra.
When $G$ is a classical group over the complex field, it is decomposed into
cells $G^{u,v}$ parametrized by two Weyl group elements $u$, $v$. It is known
that the coordinate ring of $G^{u,v}$ has a cluster algebra structure.

On the other hand, crystal bases are appearing in the context of Lie theory
and quantum groups theory. By using crystal bases, we can study the structures
of representations of Lie algebras or quantum groups combinatorially.

In this talk, after seeing examples of cluster algebras and crystal bases, I
will explain a relation between the cluster variables in $\mathbb{C}[G^{e,v}]$
and crystal bases in the case $G=SL_{r+1}(\mathbb{C})$.