A Neutral Kaehler Metric on Space of Time-like Lines in Lorentzian 3-space

Details A Neutral Kaehler Metric on Space of Time-like Lines in Lorentzian 3-space A Neutral Kaehler Metric on Space of Time-like Lines in Lorentzian 3-space

2006-08-31

arxiv.org/abs/math/0608782v2

Mathematics

Differential Geometry

17 pages, 1 figure, AMS-LATEX

Scientific paper

We study the neutral K\"ahler metric on the space of time-like lines in Lorentzian ${\Bbb{E}}^3_1$, which we identify with the total space of the tangent bundle to the hyperbolic plane. We find all of the infinitesimal isometries of this metric, as well as the geodesics, and interpret them in terms of the Lorentzian metric on ${\Bbb{E}}^3_1$. In addition, we give a new characterisation of Weingarten surfaces in Euclidean ${\Bbb{E}}^3$ and Lorentzian ${\Bbb{E}}^3_1$ as the vanishing of the scalar curvature of the associated normal congruence in the space of oriented lines. Finally, we relate our construction to the classical Weierstrass representation of minimal and maximal surfaces in ${\Bbb{E}}^3$ and ${\Bbb{E}}^3_1$.

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