The signature of the Ricci curvature of left-invariant Riemannian metrics on four-dimensional Lie groups. The nonunimodular case
2010 ◽
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2009 ◽
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pp. 245-267
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2016 ◽
Vol 47
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Keyword(s):
2016 ◽
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2007 ◽
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pp. 1650039
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2013 ◽
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