4 papers
Lanczos potentials and curvature-free connections aligned to a geodesic shear-free expanding null congruence
Fredrik Andersson
By the method of rho-integration we obtain all Lanczos potentials L_{ABCA'} of the Weyl spinor that, in a certain sense, are aligned to a geodesic shear-free expanding null congrue…
Integration of the GHP equations in spacetimes admitting a geodesic shear-free expanding null congruence
Fredrik Andersson
We perform a complete rho-integration of the GHP equations for all spacetimes that admit a geodesic shear-free expanding null congruence, whose Ricci spinor is aligned to the congr…
Local Existence of Spinor- and Tensor Potentials
F. Andersson, S. B. Edgar
We give new simple direct proofs in all spacetimes for the existence of asymmetric -spinor potentials for completely symmetric -spinors and for the existence of s…
Spinors, Spin Coefficients and Lanczos Potentials
F. Andersson, S. B. Edgar
It has been demonstrated, in a number of special situations, that the spin coefficients of a canonical spinor dyad can be used to define a Lanczos potential of the Weyl curvature s…