$AccelerationSign

• $AccelerationSign defines the global sign of the acceleration vector in terms of the derivative of a vector field: Acceleration[-a] = $AccelerationSign n[b] cd[-b][ n[-a] ] / norm.

• The default value is +1, following Wald's conventions, as usual.
• See: Section 4.6.
• See also: Acceleration.
• New in version 0.
• Last update: 14-V-2008 for version 0.9.5 of xTensor`.

Created by Mathematica  (May 16, 2008)