Real AlphaBeta-Geometries

Details Real AlphaBeta-Geometries Real AlphaBeta-Geometries

2008-08-21

arxiv.org/abs/0808.2847v1

Mathematics

Differential Geometry

13 pages

Scientific paper

By a real alphabeta-geometry we mean a four-dimensional manifold M equipped with a neutral metric h such that (M,h) admits both an integrable distribution of alpha-planes and an integrable distribution of beta-planes. We obtain a local characterization of the metric when at least one of the distributions is parallel (i.e., is a Walker geometry) and the three-dimensional distribution spanned by the alpha- and beta-distributions is integrable. The case when both distributions are parallel, which has been called two-sided Walker geometry, is obtained as a special case. We also consider real \alpha\beta-geometries for which the corresponding spinors are both multiple Weyl principal spinors.

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