Scalar

• Scalar[expr] denotes that expr is a scalar (no free indices) expression. The expression is simplified as much as possible extracting scalars and constants.

• Scalar is not an inert-head.
• Scalar hides internal dummies from the external computations.
• See: Section 5.3.
• See also: PutScalar, NoScalar, BreakScalars.
• New in version 0.
• Last update: 26-X-2007 for version 0.9.3 of xTensor`.

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