Archive
Papers
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I. Choi,
A solution to Haagerup’s problem and positive Hahn-Banach separation theorems in operator algebras,
J. Funct. Anal. 290 (2026), no. 2, Paper No. 111228, 11 pp.
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I. Choi,
Curved folding and planar cutting of simple closed curve on a conical origami,
Kodai Math. J. 39 (2016), no. 3, 579–595.
Talks
A solution to Haagerup's problem on normal weights
You may find my slide file in here.
2025
| May 13 | Tokyo, Operator Algebra Seminars at the University of Tokyo |
| Jun 6 | Kyoto, Kyoto Operator Algebra Seminars |
| Jul 8 | Seoul, China-Japan-Korea Conference on Functional Analysis |
| Jul 14 | Seoul, KIAS Seminars |
| Sep 24 | Kyoto, Operator Algebraists’ Symposium, Recent Developments in Operator Algebras |
2026
| Jun 24 | Sleat, |
| Jul 1 | Bonn, |
| Jul 7 | Münster, |
KK-theory as a stable infinity category
2025
| Sep 3 | Matsuyama, Functional Analysis Conference (Junior) |
Unbounded bivariant K-theory
2024
| Sep 18 | Sapporo, Functional Analysis Conference (Junior) |