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Linking forms revisited

Conway, Anthony ; Friedl, Stefan ; Herrmann, Gerrit


We show that the Q/Z-valued linking forms on rational homology spheres are (anti-) symmetric and we compute the linking form of a 3-dimensional rational homology sphere in terms of a Heegaard splitting. Both results have been known to a larger or lesser degree, but it is difficult to find rigorous down-to-earth proofs in the literature.

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