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HyperK\"ahler Manifolds and Birational Transformations in dimension 4
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math.AG
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birationalahlerdimensionhyperkmanifoldstransformationsassumptioncomponent
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We show that any birational map between projective hyperK\"ahler manifolds of dimension 4 is composed of a sequence of simple flops or elementary Mukai transformations under the assumption that each irreducible component of the indeterminacy of the birational map is normal.
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