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- Asia Pacific Center for Theoretical PhysicsKR22 papers
- Pusan National UniversityKR12 papers
- Seoul National UniversityKR11 papers
- Pohang Accelerator Laboratory6 papers
- Korea Institute for Advanced StudyKR5 papers
- Chonnam National UniversityKR4 papers
- Yonsei UniversityKR4 papers
- Boston UniversityUS3 papers
- Korea Advanced Institute of Science and TechnologyKR3 papers
- Kyoto UniversityJP3 papers
- Lawrence Berkeley National LaboratoryUS3 papers
- Los Alamos National LaboratoryUS3 papers
4 papers · 1 filter
-signatures, homology localization, and amenable groups
Jae Choon Cha, Kent E. Orr
Aimed at geometric applications, we prove the homology cobordism invariance of the -betti numbers and -signature defects associated to the class of amenable groups lying…
Covering link calculus and iterated Bing doubles
Jae Choon Cha, Taehee Kim
We give a new geometric obstruction to the iterated Bing double of a knot being a slice link: for n>1 the (n+1)-st iterated Bing double of a knot is rationally slice if and only if…
Topological minimal genus and -signatures
Jae Choon Cha
We obtain new lower bounds of the minimal genus of a locally flat surface representing a 2-dimensional homology class in a topological 4-manifold with boundary, using the von Neuma…
Injectivity theorems and algebraic closures of groups with coefficients
Jae Choon Cha
Recently, Cochran and Harvey defined torsion-free derived series of groups and proved an injectivity theorem on the associated torsion-free quotients. We show that there is a unive…