Dubrovnik VI – Geometric Topology

September 30 – October 7, 2007

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ABSTRACTS

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Gerard Venema
Calvin College, Grand Rapids, MI, USA

Embeddings of 2-spheres in 4-manifolds

The basic problem addressed is which 2-dimenisonal homology classes of simply connected 4-manifolds can be represented by embedded spheres. I will describe both positive and negative results and explore some of the unknown territory between the two.
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