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numerical procedures in scheme

   From: jaffer@ai.mit.edu (Aubrey Jaffer)
   Date: Wed, 12 Dec 90 13:13:35 -0500

   The scheme spec does not specify the minimum number of arguments for
   =, <, >, <=, >=.  If 0 or 1 argument is acceptable, I assume that
   these functions should return #t.

R3.99RS specifies quite clearly that each of those procedures requires
at least two arguments.