112 citations · 483 across the 59 of their papers we have counts for
Showing 2011 · math.SGShow all
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math.SG2011★ 10 cited
Symplectic cobordisms and the strong Weinstein conjecture
Hansjörg Geiges, Kai Zehmisch
We study holomorphic spheres in certain symplectic cobordisms and derive information about periodic Reeb orbits in the concave end of these cobordisms from the non-compactness of t…
math.SG2011★ 7 cited
Contact structures on principal circle bundles
Fan Ding, Hansjörg Geiges
We describe a necessary and sufficient condition for a principal circle bundle over an even-dimensional manifold to carry an invariant contact structure. As a corollary it is shown…
math.SG2011★ 24 cited
How to recognise a 4-ball when you see one
Hansjörg Geiges, Kai Zehmisch
We apply the method of filling with holomorphic discs to a 4-dimensional symplectic cobordism with the standard contact 3-sphere as a convex boundary component. We establish the fo…