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2.5.2. Commands and Functions for User-Defined Functions
User-defined functions can contain just about any CoCoA command and
may refer to other user-defined functions.  The following are some
commands that pertain particularly to functions:

  * Call -- apply a function to given arguments
  * Define -- define a function
  * Function -- return a function
  * Functions -- list the functions of a package
  * NewId -- create a new identifier
  * Return -- exit from a structured command
  * Var -- function calls by reference, other complex referencing

Details can be found by looking up each item by name.  Online, try
'?ItemName' or 'H.Syntax("ItemName")'.