# 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]= | |