Other Mathematical Notation
Mathematica 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 
, but Mathematica will not initially make any assumption about what you mean by 
.
Mathematica knows that
is an operator, but it does not initially assign any specific meaning to it.
| Out[1]= |  |
This gives
Mathematica a definition for what the
operator does.
Now
Mathematica can evaluate
operations.
| Out[3]= |  |
A few of the operators whose input is supported by Mathematica.
Mathematica assigns built-in meanings to
and
, but not to
or
.
| Out[4]= |  |
There are some forms which look like characters on a standard keyboard, but which are interpreted in a different way by Mathematica. Thus, for example, 
or Esc
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.
| Out[5]= |  |
Most operators work like 
and go in between their operands. But some operators can go in other places. Thus, for example, Esc
and Esc
or 
and 
are effectively operators which go around their operand.
The elements of the angle bracket operator go around their operand.
| Out[6]= |  |
Some additional letters and letter-like forms.
You can use letters and letter-like forms anywhere in symbol names.
| Out[7]= |  |
is assumed to be a symbol, and so is just multiplied by
and
.
| Out[8]= |  |
