# How to hide equation number with using align

Either use `\begin{align*}...\end{align*}`

or use `\nonumber`

for a specific equation to be suppressed in an `align`

environment.

This might get tedious if all equations in an `align`

environment should be unnumbered.

General rule: An environment or command with `*`

most times means: 'Do not number'

The same is true for `alignat`

and `alignat*`

environments and `equation`

and `equation*`

environments from `amsmath`

, the later two are for a single equation only.

```
\documentclass[conference]{IEEEtran}
\usepackage{amsmath}
\begin{document}
\begin{align}
f_{n}(\beta,\lambda)&= \lambda(1-\lambda/n)^{n-1} \int_{0} ^{1} g_{n}(\beta,\lambda)d\alpha \nonumber \\
& \leq \lambda(1-\lambda/n)^{n-1}\int_{0}^{1} g_{n}(\beta,1)d\alpha \\
& \leq (1-1/n)^{n-1} \int_{0}^{1} g_{n}(\beta,1)d\alpha = f_{n}(\beta,1)
\end{align}
\end{document}
```

The star form `\begin{align*}`

...`\end{align*}`

suppresses the equation number:

```
\documentclass[conference]{IEEEtran}
\usepackage{amsmath}
\begin{document}
\begin{align*}
f_{n}(\beta,\lambda)&= \lambda(1-\lambda/n)^{n-1} \int_{0} ^{1}
g_{n}(\beta,\lambda)d\alpha \\
& \leq \lambda(1-\lambda/n)^{n-1}\int_{0}^{1}
g_{n}(\beta,1)d\alpha \\
& \leq (1-1/n)^{n-1} \int_{0}^{1} g_{n}(\beta,1)d\alpha
= f_{n}(\beta,1)
\end{align*}
\end{document}
```

This is a single equation, not a collection of equations that are being aligned, so I would use `equation*`

, the `*`

suppresses the equation number, and do the alignment with `split`

, as below. This way, if I later find I need to refer to this equation and add a number all I need do is change the outer environment to `equation`

and add a `\label`

command.

```
\documentclass[conference]{IEEEtran}
\usepackage{amsmath}
\begin{document}
\begin{equation*}
\begin{split}
f_{n}(\beta,\lambda)
&= \lambda(1-\lambda/n)^{n-1} \int_{0} ^{1} g_{n}(\beta,\lambda)
\, d\alpha \\
& \leq \lambda(1-\lambda/n)^{n-1}\int_{0}^{1} g_{n}(\beta,1)
\, d\alpha \\
& \leq (1-1/n)^{n-1} \int_{0}^{1} g_{n}(\beta,1) \, d\alpha
= f_{n}(\beta,1)
\end{split}
\end{equation*}
\end{document}
```

I have added a standard thin space `\,`

before the differentials and would assume you have some punctuation to add at the end of the final line.