## Articles (Subscribe)

### Links

#### Why Time is Absolute, and Relative, But Never Universal

http://home.pacbell.net/skeptica/time.html

Article by Vincent Sauv elaborating upon a materialist view of the absolute and relative nature of time.

#### Solving Einstein's Equations in Three Dimensions

http://www.theory.caltech.edu/people/patricia/test/Einstein3.html#Einstein31

Mathematica notebook showing how to plot light cones in two plus one spacetime dimensions with a point mass. By Patricia Schwarz.

#### Inertia Manipulation Through Metric Patching

http://arxiv.org/abs/gr-qc/0106003

E-print which presents the exact solution for the stress-energy tensor of a spherical matter shell of finite thickness that will patch together different metrics at the boundaries of the shell. By David Waite.

#### Gravitomagnetic Effects

http://arxiv.org/abs/gr-qc/0407116

Introductory article by Gerhard Schfer (Jena University) about the ways that rotating bodies affect spacetime (and hence the propagation of light and particles in free fall) in their vicinity.

#### Are There Pictorial Examples of Covariant and Contravariant Vectors?

http://arxiv.org/abs/gr-qc/9807044

Present pictorial means of distinguishing contravariant vectors (or simply vectors) from covariant vectors (or linear forms). By Bernard Jancewicz (University of Wroclaw).