On the occasion of Prof. Kengo Hirachi's 60th birthday, we would like to hold a workshop that aims to serve as a place to discuss the latest works in conformal and CR geometry and related fields as well as to encourage students beginning their research and experts from other fields to enter this area by including introductory lectures.
- Update (Dec. 25, 2024): Added information on the registration and the reception.
- Update (Jan. 6, 2025): Added information on the conference venue.
- Update (Feb. 4, 2025): Added short-talk speakers. Posted the schedule. Added direction to Senri Hankyu Hotel from Senri-Chuo station.
- Update (Feb. 5, 2025): Added the link to the abstracts (and a photo in the campus).
- Update (Feb. 14, 2025): Schedule update due to the cancellation of Peter Ebenfelt's talk.
- Update (Feb. 17, 2025): Schedule update due to Alice Chang and Paul Yang's cancellation of their trip. They will give online talks in the first slots on Thursday and Friday.
Invited Speakers
- Andreas Čap (University of Vienna)
- Jeffrey Case (Pennsylvania State University)
- Sun-Yung Alice Chang (Princeton University)
- Boris Doubrov (Belarusian State University)
- C Robin Graham (University of Washington)
- Kengo Hirachi (University of Tokyo)
- Jun-Muk Hwang (Institute for Basic Science)
- Yoshinobu Kamishima (Tokyo Metropolitan University)
- Stephen McKeown (University of Texas at Dallas)
- Dương Ngọc Sơn (Phenikaa University)
- Paul Yang (Princeton University)
- Igor Zelenko (Texas A&M University)
* Fang Wang's and Peter Ebenfelt's talks have been cancelled.
Short-Talk Speakers
- Yoshiaki Suzuki (Niigata University)
- David Sykes (Institute for Basic Science)
Registration
Please fill in the Google form. You may update your response even after completing the registration.
If you will attend the reception party on Tuesday (see below), please register by Friday, February 7. Registration is optional for other participants, but is strongly appreciated.
Schedule
The room will be opened by 12:30 on Monday and by 9:00 on Tuesday onward. Prof. Hwang's second lecture and Prof. Graham's first and second lectures are intended as introductory talks.
The abstracts are available here.
Monday, February 17 — Nambu Hall
- 13:30–14:30 Jun-Muk Hwang (1) — Convergence of formal equivalences between embeddings
- 15:00–16:00 Dương Ngọc Sơn — A classification and invariants of CR maps between certain models of real hypersurfaces
Tuesday, February 18 — Nambu Hall
- 9:40–10:40 Jun-Muk Hwang (2) — Canonical connections of geometric structures
- 11:00–12:00 Boris Doubrov — CR geometry via finite type PDEs
- 13:30–14:30 C Robin Graham (1) — Introduction to conformal anomalies I
- 15:00–15:30 Yoshiaki Suzuki — The spectrum of the Folland-Stein operator on some Heisenberg Bieberbach manifolds
- 15:45–16:15 David Sykes — Pre-Kähler structures and finite-nondegeneracy
- 17:30– Reception
- Place: Cafeteria Kasane (on the campus; No. 82 of this map)
- Planned participation fee: 2,000 yen (speakers), 5,500 yen (others), collected on-site in cash. Except in unavoidable circumstances, cancellations after February 7 will, in principle, incur a fee.
Wednesday, February 19 — Nambu Hall
- 9:40–10:40 C Robin Graham (2) — Introduction to conformal anomalies II
- 11:00–12:00 Igor Zelenko — Methods of Tanaka theory in the local geometry of $k$-nondegenerate CR structures of hypersurface type
- 13:30–14:30 Andreas Čap — Recent developments on para-CR structures
- 15:00–16:00 Kengo Hirachi — Rigidity of CR functional on the spheres
Thursday, February 20 — Nambu Hall
- 9:40–10:40 Paul Yang (online) — Q prime curvature and isoperimetric constants
- 11:00–12:00 C Robin Graham (3) — Recent developments in conformal submanifold geometry
- 13:30–14:30 Jeffrey Case — CR analogues of the Bott-Chern and Aeppli cohomology groups
- 15:00–16:00 Yoshinobu Kamishima — The role of Reeb group in the parabolic structure and quaternionic contact aspherical manifolds
Friday, February 21 — Lecture Room F102
- 9:40–10:40 Sun-Yung Alice Chang (online) — On a problem of conformal fill in by Poincaré Einstein metric
- 11:00–12:00 Stephen McKeown — Renormalized volume and extrinsic GJMS operators in higher-codimension via the singular Yamabe problem
Venue
Getting to Osaka
Kansai International Airport (関西国際空港, KIX) and Osaka International Airport (大阪国際空港, a.k.a. Itami Airport = 伊丹空港, ITM) are the main options to get to Osaka University from overseas. While KIX is a major international airport, ITM currently operates as a domestic airport, contrary to its name. You may find flights to ITM connecting at Tokyo, for example.
All the speakers from overseas will be accommodated at Senri Hankyu Hotel (千里阪急ホテル), which is adjacent to Senri-Chuo Station (千里中央駅) on Osaka Monorail (大阪モノレール) and on Kita-Osaka Kyuko Line (北大阪急行).
- If you arrive at ITM, Senri-Chuo is just four stops away via the monorail. Taking a taxi directly to the hotel is also a convenient choice.
- If you arrive at KIX, we recommend taking a shuttle bus to Itami Airport/Hotarugaike Station (Hotarugaike is the monorail station next to Itami Airport) or to Namba OCAT. From Namba, take the northbound Osaka Metro Midosuji Line (大阪メトロ御堂筋線) and stay on the train as it continues onto Kita-Osaka Kyuko Line until you reach Senri-Chuo. Alternatively, a taxi from Namba to the hotel probably costs around 6,000 yen.
Here is the direction from Senri-Chuo Station to Senri Hankyu Hotel taken from the hotel's webpage: from Osaka Monorail's station from Kita-Osaka Kyuko Line's station
Conference Venue
Osaka University's Toyonaka Campus is within a five-minute walk from Osaka monorail's Shibahara-Handai-mae Station (柴原阪大前駅). To avoid confusion, we recommend entering the campus through the main gate, rather than the closer “Shibahara Entrance.”
Here is the campus map — or this one may be more informative.
For the first four days, the workshop will be held at Nambu Yoichiro Hall, located on the second floor of the Building J of the School of Science. There is a Lawson (a convenience store) on the first floor of the same building; the entrance is on its back.
For the last day, the venue will change to Lecture Room F102 in Building F of the School of Science, which is the closest building to the main gate of the campus.
Both rooms are equipped with blackboards and projectors.
Travel Support
We provide financial support mainly for graduate students and postdocs for domestic travel & accommodation expenses. Contact Yuya Takeuchi (ytakeuchi (at) math.tsukuba.ac.jp) with your name, affiliation, and the name of your advisor. Apply by Sunday, December 8 for full consideration.
Organizers
- Taiji Marugame (University of Electro-Communications)
- Yoshihiko Matsumoto (Osaka University)
- Yuya Takeuchi (University of Tsukuba)