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math.DG2008★ 13 cited
Spin coefficients for four-dimensional neutral metrics, and null geometry
Peter R. Law
Notation for spin coefficients for metrics of neutral signature in four dimensions is introduced. The utility and interpretation of spin coefficients is explored through themes in…
math.DG2006★ 13 cited
A spinor approach to Walker geometry
Peter R Law, Yasuo Matsushita
A four-dimensional Walker geometry is a four-dimensional manifold M with a neutral metric g and a parallel distribution of totally null two-planes. This distribution has a natural…