Omega(Ω) is an important symbol for scientific use. If you want to make a beautiful document, you need to know many uses of this symbol.

Different latex syntax of this symbol is given in the table below.

```
\documentclass{article}
\begin{document}
$$ [S] = [\Omega^{-1}] $$
$$ \Omega = -K_B T\log Z $$
$$ \Omega = \frac{A}{r^2}$$
$$ \Omega \equiv \frac{\rho}{\rho_c} $$
$$ \Omega = \{S_1, S_2, \dots, S_n\} $$
\end{document}
```

**Output : **

Best practice is to use `\omega`

command for Capital Omega symbol. And below are some more complex expressions that will help make your document more beautiful.

```
\documentclass{article}
\begin{document}
$$ \mathrm{d}\Omega = \sin\theta d\theta d\phi $$
$$ \frac{\partial \Omega}{\partial \phi} = 4\pi\sin^{2}\frac{\theta}{2}d\theta $$
$$ \sum_{i=1}^n \Omega_i = 2\sum_{i=1}^{n-2}-4\pi $$
$$ \Omega_d = \frac{2\pi^{\frac{d}{2}}}{t} $$
\end{document}
```

**Output : **

## Use superscript and subscript with big omega

If you want to use Superscript and Subscript with a symbol, you have to use both expressions at the same time.

I think the most beautiful use of latex is that you can define new commands with different arguments.

```
\documentclass{article}
\newcommand\Ome[2]{\Omega^{#1}_{#2}}
\newcommand\Omex[1]{\Omega_{#1}}
\begin{document}
$$ \Ome{0}{c} \quad \Ome{-}{b} $$
$$ \Ome{+}{cc} \quad \Ome{0}{cb} $$
$$ \Ome{0}{cbb} \quad \Ome{-}{bbb} $$
$$ \Ome{+}{cc} \quad \Ome{0}{cb} $$
$$ \Omex{c}(3050)^0 \quad \Omex{c}(3119)^0 $$
$$ \Omex{0,R} \quad \Omex{0,M} $$
$$ \Omega = e^{-\Omega} $$
\end{document}
```

**Output : **

Two arguments are defined for superscript and subscript with `\Omex`

command.

## Use mho symbol in LaTeX

If you reverse the Big Omega symbol, you will get the mho symbol. Older versions of Latex defined the `\mho`

command for this symbol, which is not currently supported.

Of course, the exact same command you have in more different packages like amssymb, stix, etc.

```
\documentclass{article}
\usepackage{amssymb}
\begin{document}
$$ \mho^{(i)}(G) = \left\{g^{p^i} : g^{\epsilon^G} \right\} $$
$$ \mho(H) = \Omega(G) $$
$$ G=\mho^0(G) \geq \mho^1(G) \geq \dots \geq \mho^{K-1}(G) > \mho^k (G) $$
$$ \mho^i (G/N) \blacktriangleleft G $$
$$ \left|\mho^i(G).\mho^{i+1}(G)\right| $$
\end{document}
```

**Output : **

## Use bold omega symbol as vector in LaTeX

Omega commands should be used for small omega symbols. This symbol is used to represent vector quantity in physics.

A vector quantity is denoted by text-style bold and placing a vector mark on the symbol.

```
\documentclass{article}
\usepackage{amsmath}
\begin{document}
$$ \boldsymbol{\omega} = \omega\mathbf{n} $$
$$ \boldsymbol{\omega} = \frac{\mathbf{r}\times\mathbf{v}}{r^2} $$
$$ \vec{v}_\perp = \vec{w} + \vec{r} $$
\end{document}
```

**Output : **