# The physics Package

Documentation | physics |
---|---|

Categories | physics |

Description | The physics package supplies a great many conveniences for typesetting physics equations. Among these is an improved version of the |

Options |
\usepackage{physics} |

Examples |

The following surrounds the fraction a/b with parentheses that are sized appropriately. You can also use brackets and braces.

```
$\qty( \frac{a}{b} )$
$\qty[ \frac{1-x^2}{2x} ]$
$\qty[ \frac{1-x^2}{2x} ]$
```

For the measure in an integral, use `\dd{x}`

, which sets the **d** in roman font and adjust spacing before it according to context. Use `\dv{x}`

for d/dx, `\dv{f}{x}`

for $\df/dx$, and `\dv*{f}{x}`

for an inline version. Similar expressions for partial derivatives use `\pdv`

.

```
\begin{equation}
\Gamma[n+1) = \int_{0}^{\infty} x^n e^{-x} \dd{x}
\label{eq:gamma}
\end{equation}
```

For vectors, you can use `\vb{F}`

or `\vb*{\sigma)`

for vectors set in boldface, `\va{F}`

or `\va*{\theta}`

for an arrow, and `\vu{a}`

or `\vu*{\theta}`

for unit vectors. There is also full support for Dirac bra-ket notation.