ScalarQ

• ScalarQ[expr] gives True if expr is a scalar (a expression without free indices) and False otherwise.

• Recall that only abstract and basis indices can be free. Blocked indices are never free indices.
• See: Section 5.3.
• See also: Scalar, UpVectorQ, DownVectorQ.
• New in version 0.
• Last update: 28-X-2007 for version 0.9.3 of xTensor`.

Created by Mathematica  (May 16, 2008)