VisitorsOf

• VisitorsOf[symbol] gives the list of all symbols which require symbol to exist before they can be defined. symbol can only be removed if this list is empty.

• A symbol with "visitors" is called a "host".
• Hosts for a tensor are its dependencies: manifolds and parameters.
• See: Section 1.4.
• See also: ServantsOf, HostsOf.
• New in version 0. Up to version 0.9.4 this function was called ObjectsOf.
• Last update: 15-V-2008 for version 0.9.5 of xTensor`.

Created by Mathematica  (May 16, 2008)