Syntax
where
We can use the XF: command to delete functions. The first form
of the syntax deletes the functions whose names are
, 
, ..., are the names of functions.
,
Names of functions which do not exist are ignored. Note in particular
that only the alphanumeric part of the function name should be given -
that is, indices representing unknowns should not be given. The
prefix symbol ``#'' associated with functions may be omitted.
