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WWGD

Science Advisor

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2019 Award

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## Main Question or Discussion Point

Hi, there is a result that every closed, oriented 3-manifold is the boundary of a 4-manifold that has only 0- and 2- handles. Anyone know other of these "boundary results" for some higher-dimensional manifolds, e.g., every closed, oriented k-manifold is the boundary of a (k+1)- dimensional manifold..... ?

Thanks.

Thanks.