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math.SG2006★ 3 cited
A unique decomposition theorem for tight contact 3-manifolds
Fan Ding, Hansjörg Geiges
It has been shown by V. Colin that every tight contact 3-manifold can be written as a connected sum of prime manifolds. Here we prove that the summands in this decomposition are un…
math.SG2006
A formula for the Chern classes of symplectic blow-ups
Hansjörg Geiges, Federica Pasquotto
It is shown that the formula for the Chern classes (in the Chow ring) of blow-ups of algebraic varieties, due to Porteous and Lascu-Scott, also holds (in the cohomology ring) for b…