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math-ph2010
Spinor algebra and null solutions of the wave equation
Mohammad Wehbe
In this paper we exploit the ideas and formalisms of twistor theory, to show how, on Minkowski space, given a null solution of the wave equation, there are precisely two null direc…
math-ph2010★ 5 cited
Twistor theory on a finite graph
Paul Baird, Mohammad Wehbe
We show how the description of a shear-free ray congruence in Minkowski space as an evolving family of semi-conformal mappings can naturally be formulated on a finite graph. For th…
math-ph2009★ 1 cited
Shear-free ray congruences on curved space-times
Paul Baird, Mohammad Wehbe
A shear-free ray congruence on Minkowski space is a 3-parameter family of null geodesics along which Lie transport of a complementary 2-dimensional spacelike subspace (called the s…