This is documentation for Mathematica 3, which was
based on an earlier version of the Wolfram Language.
 3.10.4 Operators Basic Mathematical Operators Some operators used in basic arithmetic and algebra. Note that the for \[Cross] is distinguished by being drawn slightly smaller than the Ã for \[Times]. Interpretation of some operators in basic arithmetic and algebra. Operators in Calculus Operators used in calculus. Logical and Other Connectives Operators used as logical connectives. The operators , and ¬ are interpreted as corresponding to the built-in functions And, Or and Not, and are equivalent to the keyboard operators &&, || and !. Note that ¬ is a prefix operator. xy and xy are both taken to give the built-in function Implies[x,y]. This is interpreted using the built-in functions And and Implies. In[1]:= 3 < 4 x > 5 y < 7 Out[1]= Mathematica supports most of the standard syntax used in mathematical logic. In Mathematica, however, the variables that appear in the quantifiers , and must appear as subscripts. If they appeared directly after the quantifier symbols then there could be a conflict with multiplication operations. and are essentially prefix operators like . In[2]:= Out[2]//FullForm= Operators Used to Represent Actions Operators typically used to represent actions. All the operators except \[Square] are infix. Following Mathematica's usual convention, all the operators in the table above are interpreted to give functions whose names are exactly the names of the characters that appear in the operators. The operators are interpreted as functions with corresponding names. In[3]:= x y z // FullForm Out[3]//FullForm= All the operators in the table above, except for ï , are infix, so that they must appear in between their operands. Bracketing Operators Characters used as bracketing operators. Interpretations of bracketing operators. Operators Used to Represent Relations Operators usually used to represent similarity or equivalence. The special character (or \[Equal]) is an alternative input form for ==.  is used both for input and output. In[4]:= {a == b, a b, a != b, a b} Out[4]= Operators usually used for ordering by magnitude. Operators used for relations in sets. Operators usually used for other kinds of orderings. Relational operators based on vertical bars. Operators Based on Arrows and Vectors Operators based on arrows are often used in pure mathematics and elsewhere to represent various kinds of transformations or changes. is equivalent to ->. In[5]:= x + y /. x 3 Out[5]= Arrow-like operators with built-in meanings in Mathematica. Ordinary arrows. Vectors and related arrows. All the arrow and vector-like operators in Mathematica are infix. In[6]:= x y z Out[6]= Tees.