LIndexQ

• LIndexQ[expr] gives True if expr is a valid label-index.

• A label index can be either an expression with head LI, or minus that expression.
• See: Section 2.5.
• See also: GIndexQ.
• New in version 0.
• Last update: 24-IX-2007 for version 0.9.3 of xTensor`.

Created by Mathematica  (May 16, 2008)