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Q3141450 - MaRDI portal

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    4 January 1994
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    stabilizing with connected sums of \(S^ 2\times S^ 2\)
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    cancelling connected summands of products of 2-spheres
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    quadratic modules
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    topological 4-manifolds with finite fundamental group
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    cancellation of hyperbolic forms
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    diffeomorphisms of 4-manifolds
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    locally flat simple embeddings of 2-spheres in a 1-connected 4-manifold
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    pseudo-free actions of finite cyclic groups on 1-connected 4-manifolds
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    local fixed-point data
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    signature
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    Euler characteristic
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    Kirby-Siebenmann invariant
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