Start up MathTensor

MathTensor is a set of Mathematica programs for doing calculations with tensors. First the package has to be loaded into the kernel:

In[1]:=

  
  <</LocalApps/MathTensor/MathTensor.m

  Loading MathTensor for UNIX . . . 

  

  

  

  ========================================================

  MathTensor (TM) 2.2 (UNIX (R)) (June 1, 1994)

  by Leonard Parker and Steven M. Christensen

  Copyright (c) 1991-1994 MathSolutions, Inc.

  Runs with Mathematica (R) Versions 2.X.

  Licensed to machine patricia-ppp.

  ========================================================

  No unit system is chosen. If you want one,

  you must edit the file called Conventions.m,

  or enter a command to interactively set units.

  Units: {}

  Sign conventions: Rmsign = 1 Rcsign = 1

  MetricgSign = 1 DetgSign = -1

  TensorForm turned on,

  ShowTime turned off,

  MetricgFlag = True.

  =========================================

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What is the spacetime geometry?