The 43rd Japan Symposium
on Commutative Algebra

Date & Venue

• Date

  November 14-18 (Mon-Fri), 2022

• Venue

  Osaka University (Toyonaka Campus)

  Nambu Yoichiro Hall in the Science Building J

• Style

  IN-PERSON

  (see "Conference Style and Infection Prevention Measures" below)

Program & Abstracts

• Program

  PDF (English) / PDF (Japanese)

• Abstracts

  PDF (updated on November 13, 2022)

Proceedings

• No. 1

  Shinnosuke Ishiro
  The canonical module and a Gorenstein criterion of a local log-regular ring

• No. 2

  Ryo Ishizuka
  An explicit construction of perfectoid almost Cohen–Macaulay algebras in mixed characteristic

• Proceedings of the Symposia on Commutative Algebra in Japan

Slides & Notes

• Day 1

  Koji Nishida
  On the Hilbert coefficients of graded modules over graded rings
  slides

• Tomohiro Okuma, Kei-ichi Watanabe, and Ken-ichi Yoshida
  Gorensteinness for normal tangent cones of geometric ideals
  slides

• Taro Inagawa and Kazuhiko Kurano
  On finite generation of symbolic Rees rings
  slides, notes

• Day 2

  Sora Miyashita
  Levelness versus nearly Gorensteinness of homogeneous domains
  notes

• Koji Matsushita
  Conic divisorial ideals of toric rings and applications to stable set rings
  slides

• Day 3

  Nguyen Thi Thanh Tam
  The existence of balanced neighborly polynomials
  slides

• Anurag K. Singh
  When are the natural embeddings of classical invariant rings pure?
  notes

• Day 4

  Naoki Endo, Shiro Goto
  Reflexive modules over the endomorphism algebras of reflexive trace ideals
  slides

• Day 5

  Mitsuhiro Miyazaki
  On the Ehrhart ring of the stable set polytope of a cycle graph
  slides

Group Photo

• Photo

  Group Photo (taken on November 16, 2022)

  Not all participants appear in the group photos.

  Participants took off their masks only during the photo session.

Talk Application, Registration, and Support

Read "Conference Style and Infection Prevention Measures" below carefully before making your registration.

• 1

  Registration (Deadline: October 31, 2022; CLOSED)

  • Registration closed. If you have made registration before the deadline, you can attend the symposium (except those who got special instruction). You can't attend the symposium if you have not registered or being invited.

• 2

  Talk Application (Deadline: September 30, 2022; CLOSED)

  • Application closed: If you have not submitted an abstract after talk application, please submit your abstract (PDF, A4 paper, about one page, English) at Abstract Submission Page.

  • If there are many speakers, we might ask you to change the length of your talk.

  • You can choose the length of your talk from 30 minutes and 50 minutes. Since we will have an invited speaker from abroad, prepare your slides or writing in English. We also encourage you to speak in English.

  • We will not make the printed proceedings, but you can make your slides or notes available on our website. We will let you know the details later.

• 3

  Travel and Accommodation Support (Deadline: September 30, 2022; CLOSED)

  • Application closed.

  • Since our budget is limited, we might not be able to support all applicants. The result will be informed around the middle of October.

Conference Style and Infection Prevention Measures

• 1

  Conference Style (Updated on July 24, 2022)

  We plan to hold the symposium completely IN-PERSON this year, but we will change the plan in the following cases:

  • If a state of emergency is declared in Osaka Prefecture (or it becomes impossible to hold an in-person symposium in Osaka University), sometime from October 14 to the end of the symposium, then the symposium will be completely ONLINE from that point on.

  • If a state of emergency (except Osaka) or a semi-state of emergency is declared in some prefecture(s) in Japan, sometime from October 14 to the end of the symposium, then the symposium will be in HYBRID style, meaning that each participant can decide whether they attend in-person or online. However, we ask you to attend online if you stay in one of the prefectures under a state of emergency.

  • If some participant(s) get positive for COVID-19, then the symposium will be completely ONLINE from that point on.

  • If some participant(s) get a fever (37.5°C or higher), then the symposium will be in HYBRID style. We ask you to attend online if you have talked or dined with them without wearing a mask.

  • If the symposium is completely ONLINE, each speaker can choose whether giving an online talk or simply uploading the contents of the talk (such as slides, notes, or a video you recorded) to our designated page (which is also regareded as a "talk"). The organizers will manage those files and make them available only to the participants of the symposium.

  • If the symposium is in HYBRID style, each participant (including speakers) can choose whether they attend in-person or online. If the speaker choose to attend online, the rule will be the same as the completely online case.

  • If the meaning of a (semi-)state of emergency, or any of other factors changes, the organizers may change the above policies.

• 2

  Infection Prevention Measures (Updated on July 24, 2022)

  We ask all participants to take the following infection prevention measures:

  • Always wear a mask in the lecture room.

  • Disinfect your hands when you enter the room or use shared items in the room, such as hand-held microphones, chalks, or erasers.

  • Keep your social distance; do not sit right next to another participant.

  • Do not eat in the lecture room.

  • Check your temperature every morning. If your temperature is 37.5°C or higher, refrain from coming to the campus and inform the organizers.

  • Whether you have a fever or not, stay home if you are in bad health potentially related to COVID-19.

  • If the guideline of Osaka University changes, the organizers may change the above policies.

  • For other measures, have a look at Requests from Osaka Prefecture.

Venue Information

• 1

  Room Facilities & Travel Information

  • See the webpage of Nambu Yoichiro Hall for facilities in the lecture room and travel information.

  • eduroam is available in the lecture room. If you have an ID and a password for eduroam issued by your university/organization, you can connect to Wi-Fi in participating organizations (such as Osaka University) without any further application.

• 2

  Others

  • Rooms will not be locked during lunch. Please be responsible of your own belongings.

  • We do not provide drink or snacks. We do not hold a banquet.

Support

• Grant-in-Aid for Scientific Research (A), Grant Number: JP19H00637
  (Principal Investigator: Takayuki Hibi)

• Grant-in-Aid for Scientific Research (C), Grant Number: JP20K03538
  (Principal Investigator: Mitsuyasu Hashimoto)

• Grant-in-Aid for Scientific Research (C), Grant Number: JP20K03513
  (Principal Investigator: Akihiro Higashitani)

• Grant-in-Aid for Early-Career Scientists, Grant Number: JP20K14288
  (Principal Investigator: Ryo Kanda)

• Leading Initiative for Excellent Young Researchers (Researcher: Ryo Kanda)

• OCAMI: MEXT Joint Usage/Research Center on Mathematics and Theoretical Physics JPMXP0619217849

Links

• Mailing List of Commutative Algebra in Japan (website written in Japanese)

• Proceedings of the Symposia on Commutative Algebra in Japan

Organizers

• Yusuke Nakajima (Kyoto Sangyo University)

• Akihiro Higashitani (Osaka University)

• Ryo Kanda (Osaka Metropolitan University)