11.8 Other Mathematical Notation
Mathematica TE supports an extremely wide range of mathematical notation, although often it does not assign a predefined meaning to it. Thus, for example, you can enter an expression such as x 
y, but Mathematica TE will not initially make any assumption about what you mean by 
.
Mathematica TE knows that 
is an operator, but it does not initially assign any specific meaning to it.
In[1]:= {17 
5, 8 3}
Out[1]= 
This gives Mathematica TE a definition for what the 
operator does.
In[2]:= x_ y_ := Mod[x + y, 2]
Now Mathematica TE can evaluate 
operations.
In[3]:= {17 5, 8 3}
Out[3]= 
A few of the operators whose input is supported by Mathematica.
Mathematica TE assigns built-in meanings to 
and 
, but not to 
or 
.
In[4]:= {3 
4, 3 
4, 3 
4, 3 
4}
Out[4]= 
There are some forms that look like characters on a standard keyboard but are interpreted in a different way by Mathematica TE. Thus, for example, \[Backslash] or 
\ displays as \ but is not interpreted in the same way as a \ typed directly on the keyboard.
The 
and 
characters used here are different from the \ and ^ you would type directly on a keyboard.
In[5]:= {a \ b, a ^ b}
Out[5]= 
Most operators work like 
and go in between their operands. But some operators can go in other places. Thus, for example, < and > or \[LeftAngleBracket] and \[RightAngleBracket] are effectively operators that go around their operand.
The elements of the angle bracket operator go around their operand.
In[6]:= \[LeftAngleBracket] 1 + x \[RightAngleBracket]
Out[6]= 
Some additional letters and letterlike forms.
You can use letters and letterlike forms anywhere in symbol names.
In[7]:= {
, \[Angle]ABC}
Out[7]= 
is assumed to be a symbol, and so is just multiplied by a and b.
In[8]:= a b
Out[8]= 
