Which compact boundaryless 3-manifolds embed smoothly in the 4-sphere? โ˜…โ˜…โ˜…

Author(s): Kirby

\begin{problem} Determine a computable set of invariants that allow one to determine, given a compact boundaryless 3-manifold, whether or not it embeds smoothly in the 4-sphere. This should include a constructive procedure to find an embedding if the manifold is embeddable. % Enter your conjecture in LaTeX % You may change "conjecture" to "question" or "problem" if you prefer. \end{problem}

Keywords: 3-manifold; 4-sphere; embedding

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