Labels

Labels is the "vbundle" to which all labels belong.

• Label-indices can be given a height: LI[expr] is a "contravariant label" and -LI[expr] (not LI[-expr]) is a "covariant label".
• Label-indices can have any internal structure. In particular they can have several elements.
• See: Section 2.5.
• See also: LI, LIndexQ.
• New in version 0.
• Last update: 24-IX-2007 for version 0.9.3 of xTensor`.


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