GradMetricToChristoffel

• GradMetricToChristoffel[expr,metric,covd] expresses the covariant derivatives covd of metric in expr as symmetrized sums of Christoffels from the Levi-Civita connection of metric to covd.
• GradMetricToChristoffel[expr,metric] performs the same operation for all covariant derivatives.
• GradMetricToChristoffel[expr] performs the same operation for all metrics and for all covariant derivatives.

• The second and third arguments are listable.
• `All covariant derivatives´ means those in the list $CovDs.
• `All metrics´ means those in the list $Metrics.
• See: Section 4.5.
• See also: ChristoffelToGradMetric.
• New in version 0.
• Last update: 25-X-2007 for version 0.9.3 of xTensor`.

Created by Mathematica  (May 16, 2008)