HostsOf

HostsOf[symbol] gives the list of all symbols which are required to exist previously, before symbol was defined, and which cannot be undefined as long as symbol exists.

• A symbol with "hosts" is called a "visitor".
• Hosts for a tensor are its dependencies: manifolds and parameters.
• See: Section 1.4.
• See also: ServantsOf, VisitorsOf.
• New in version 0.
• Last update: 15-V-2008 for version 0.9.5 of xTensor`.


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