New examples of indefinite hyper-Kaehler symmetric spaces
classification
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spacessymmetrichyper-kaehlerexamplesindefiniteapproachclassifydeveloped
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Following the approach to pseudo-Riemannian symmetric spaces developed in math.DG/0408249 we exhibit examples of indefinite hyper-Kaehler symmetric spaces with non-abelian holonomy. Moreover, we classify indecomposable hyper-Kaehler symmetric spaces whose metric has signature (4,4n). Such spaces exist if and only if n=0,1,3.
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