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Q3803841 - MaRDI portal

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    1988
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    representation of a homology class
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    simply connected smooth 4-manifold
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    almost definite intersection form
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    immersed 2-sphere
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    self-intersection points
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    smooth 4-manifolds which are homeomorphic to \(D^ 2\times {\mathbb{R}}^ 2\)
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