Jae Choon Cha is an Associate Professor of Mathematics and K. W. Kwun Chair Professor at POSTECH. He is also an Affiliate Professor at KIAS, and an Editor of Bulletin of the Korean Mathematical Society.
- Program Committee, The 8th East Asian School of Knots and Related Topics, January 9-12, 2012, KAIST, Daejeon, Korea.
- Program Committee, The 7th East Asian School of Knots and Related Topics, January 10-13, 2011, Hiroshima University, Higashi-Hiroshima, Japan.
- Some recent results on links, 3-manifolds, Whitney towers and amenable Cheeger-Gromov invariants, Tokyo workshop on low dimensional topology, March 20, 2012, Tokyo Institute of Technology, Tokyo, Japan.
- Hidden torsion in 3-manifold groups and homology cobordism, The 8th East Asian School of Knots and Related Topics, January 11, 2012, Daejeon, Korea.
- An introduction to $L^2$-invariants I, II, III, The 8th East Asian School of Knots and Related Topics, January 9-11, 2012, Daejeon, Korea.
- Invariants of cobordism of knots and 3-manifolds, Invited talk at 2011 Fall Meeting of Mathematical Society of Japan, September 28, 2011, Shinshu University, Matsumoto City, Nagano, Japan.
Research on Geometric Topology
Knot theory: placement problems of manifold pairs- Topology of low dimensional manifolds
- Related algebra, homotopy theory, and L2-invariants
KnotInfo: a table of invariants of classical knots, maintained by Charles Livingston and me.
- Jae Choon Cha, Symmetric Whitney tower cobordism for bordered 3-manifolds and links.
[ Preprint version arxiv:1204.4968 (28 pages) ] - Jae Choon Cha and Daniel Ruberman, Concordance to links with unknotted components, Algebraic and Geometric Topology 12 (2012), 963-977.
[ Published version | Preprint version arXiv:1103.2417 ] - Jae Choon Cha and Kent E. Orr, Hidden torsion, 3-manifolds, and homology cobordism, to appear in Journal of Topology.
[ Preprint version arXiv:1101.4092 (23 pages) ] - Jae Choon Cha, Taehee Kim, Daniel Ruberman, and Saso Strle, Smooth concordance of links topologically concordant to the Hopf link, to appear in Bulletin of the London Mathematical Society.
[ Published version | Preprint version arXiv:1012.2045 ] - Jae Choon Cha, Amenable L2-theoretic methods and knot concordance.
[ Preprint version arXiv:1010.1058 (25 pages) ] - Jae Choon Cha and Stefan Friedl, Twisted torsion invariants and link concordance, to appear in Forum Mathematicum.
[ Published version | Preprint version arXiv:1001.0926 ] - Jae Choon Cha and Kent E. Orr, $L^2$-signatures, homology localization, and amenable groups, Communications on Pure and Applied Mathematics 65 (2012), 790-832.
[ Published version | Preprint version arXiv:0910.3700 ]