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This tag is used if a reference is needed in a paper or textbook on a specific result.

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3-sphere bundles over 4-sphere bound smooth disc bundles

I saw in the answer of this post: Is it true that all sphere bundles are boundaries of disk bundles? that a $S^3$-bundle over $S^4$ bounds a disc bundle over $S^4$ iff $O(4)\rightarrow Diff(S^3)$ is …
Renato Moreira's user avatar