On the cohomology of hyperkahler quotients
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🧮 math.SG
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ahlerhyperkquotientscohomologycriterionactionsanalogueapplied
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This paper gives a partial desingularisation construction for hyperk\"ahler quotients and a criterion for the surjectivity of an analogue of the Kirwan map to the cohomology of hyperk\"ahler quotients. This criterion is applied to some linear actions on hyperk\"ahler vector spaces.
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