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Re: What is @@@?

• To: mathgroup at smc.vnet.net
• Subject: [mg87392] Re: What is @@@?
• From: AES <siegman at stanford.edu>
• Date: Wed, 9 Apr 2008 05:56:27 -0400 (EDT)
• Organization: Stanford University
• References: <ftfeg5$bs4$1@smc.vnet.net>

The link presented earlier in this thread,

  <http://documents.wolfram.com/mathematica/book/section-A.2.7>

starts off with:
 

   A.2.7 Operator Input Forms

   Characters that are not letters, letter-like forms or structural
   elements are treated by Mathematica as operators.


Since letters are not numbers (i.e., numerals); the formal documentation 
on "letter-like forms" makes no mention of numbers; and I don't think 
that numbers are "structural elements" (didn't look that one up, 
actually), does this mean that Mathematica treats "3" as an operator, so 
that inputs like

   a 3 b    or    a3b

are taken as some kind of operator connecting a and b, or operating on b?