57 citations · 499 across the 40 of their papers we have counts for
4 papers · 1 filter
Cycles, submanifolds, and structures on normal bundles
C. Bohr, B. Hanke, D. Kotschick
We give explicit examples of degree 3 cohomology classes not Poincare dual to submanifolds, and discuss the realisability of homology classes by submanifolds with Spin-C normal bun…
Bounded cohomology and non-uniform perfection of mapping class groups
H. Endo, D. Kotschick
Using the existence of certain symplectic submanifolds in symplectic 4-manifolds, we prove an estimate from above for the number of singular fibers with separating vanishing cycles…
On products of harmonic forms
D. Kotschick
We prove that manifolds admitting a Riemannian metric for which products of harmonic forms are harmonic satisfy strong topological restrictions, some of which are akin to propertie…
Some examples of aspherical symplectic four-manifolds
H. Endo, D. Kotschick
The paper was withdrawn due to a gap in the proof of Lemma 3.