作者: Sigbjørn Hervik , Alan Coley
DOI: 10.1142/S0219887811005932
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摘要: We consider arbitrary-dimensional pseudo-Riemannian spaces of signature (k, k + m). introduce a boost-weight decomposition and define number algebraic properties (e.g. the Si- N-properties) present to classify Weyl tensors arbitrary discuss degenerate types VSI spaces). four dimensional neutral space as an illustration.