Odd indentation after \newline, after Math text

So this happens whenever I try to insert a new line in my source code:

The center equation is no longer centered! Why does that happen? I can't seem to figure out how to center it. Here's the related source code:

\begin{center}

$$\frac{p_{0a}}{p_{a}}=(1+\frac{\gamma-1}{2} M_{a}^2)^{\frac{\gamma}{\gamma-1}} \label{p0/p}$$

$\frac{p_{0a}}{19,000Pa}=(1+\frac{1.393-1}{2}0.85^2)^{\frac{1.393}{1.393-1}}$ \newline

$p_{0a}=30416.8 Pa$


I don't want the equation numbering on the second and third equations is why I haven't used . I've tried using \newline, \\\\, and \noindent but nothing seems to work. Any help would be much appreciated!

• The math content of an equation is already centered (even without center env., the equation number isn't. If you don't want to have a number, use $....$ instead, but in this case, the \label  is useless. Please consider to use siunitx as well for the numbers and units
– user31729
May 4 '16 at 23:34
• Oh, I see. Thank you for the explanation! Will keep this in mind May 4 '16 at 23:38
• the \begin{center} isn't ended before your two "in-text" math lines. for the first of those, the \newline forces a "long" line, but then you have a blank line which causes a paragraph break, and the next line is centered. May 5 '16 at 13:34

How about using the \begin{equation*} ... \end{equation*} environment? This helps avoid the numbering of your equation.

• This worked great! Thanks for the quick reply. It makes the equations look better too which is definitely better. May 4 '16 at 23:38

The math content of the equation environment is already centered, the equation number is either left or right, so there's no need to use an external center environment.

The same is true for the $...$ display math structure.

A suggestion with $....$ and with \begin{align*}...\end{align*} and the numbered align version.

In my opinion the align(*) version is to be preferred here!

I've added siunitx to improve the look of the physical units and quantities.

\documentclass{article}

\usepackage{siunitx}
\usepackage{mathtools}
\usepackage{mleftright}

\begin{document}

$\frac{p_{0a}}{p_{a}}=(1+\frac{\gamma-1}{2} M_{a}^2)^{\frac{\gamma}{\gamma-1}}$

$\frac{p_{0a}}{19,000Pa}=(1+\frac{1.393-1}{2}0.85^2)^{\frac{1.393}{1.393-1}}$

$p_{0a}=30416.8 Pa$

\begin{align}
\frac{p_{0a}}{p_{a}}&=\mleft(1+\frac{\gamma-1}{2} M_{a}^2\mright)^{\frac{\gamma}{\gamma-1}}\label{pressureequation} \\
\frac{p_{0a}}{\SI{19000}{\pascal}}&=\mleft(1+\frac{1.393-1}{2}0.85^2\mright)^{\frac{1.393}{1.393-1}} \nonumber \\
p_{0a}&=\SI{30416.8}{\pascal} \nonumber
\end{align}

\begin{align*}
\frac{p_{0a}}{p_{a}}&=\mleft(1+\frac{\gamma-1}{2} M_{a}^2\mright)^{\frac{\gamma}{\gamma-1}} \\
\frac{p_{0a}}{\SI{19000}{\pascal}}&=\mleft(1+\frac{1.393-1}{2}0.85^2\mright)^{\frac{1.393}{1.393-1}} \\
p_{0a}&=\SI{30416.8}{\pascal}
\end{align*}

\end{document}


• Oh, that certainly cleans things up quite a bit. Thank you for your suggestion May 4 '16 at 23:45

Simply try gatherand the \notag command:

\documentclass{article}
\usepackage{mathtools}

\begin{document}

\begin{gather}
\frac{p_{0a}}{p_{a}}=\Bigl(1+\frac{\gamma-1}{2} M_{a}²\Bigr)^{\frac{γ}{\gamma-1}}\label{p0/p}\\
\frac{p_{0a}}{19,000Pa}=\Bigl(1+\frac{1.393-1}{2}0.85²\Bigr)^{\frac{1.393}{1.393-1}} \notag\\[1ex]
p_{0a}=30416.8 Pa \notag
\end{gather}

\end{document}