[Tex/LaTex] Remove horizontal space from align and equation globally

Question

I want to cram as many equations that I can in align environment. I was able to set the margins to zero and remove the space before and after the equations. Se below example code.

However, currently (and by default) the align and equation environments insert generous whitespace to the left of my equations. How do I set this space to zero globally?

I wasn't able to find an answer on google, so I hope some of you know the answer.

Here is an example. Notice that once compiled, the words "Harmonic oscillator" refuses to squeeze to the left margin:

\documentclass[9pt,norsk,a4paper]{article}
\usepackage[paper=a4paper, top=.1in,bottom=.1in,right=0.1in,left=0.1in]{geometry}
\usepackage[utf8]{inputenc}
\usepackage[norsk]{babel}
\usepackage{amsmath,amsthm}
\newcommand{\E}[1]{\left\langle #1 \right\rangle}
\def\dd #1;#2;{\frac{\mathrm{d} #1 }{\mathrm{d} #2 }}
\def\pp #1;#2;{\frac{\partial #1 }{\partial #2 }}

\setlength\parindent{0pt}
\begin{document}
\setlength{\abovedisplayskip}{0pt}
\setlength{\belowdisplayskip}{0pt}
\setlength{\abovedisplayshortskip}{0pt}
\setlength{\belowdisplayshortskip}{0pt}
\begin{align*}
\textbf{Harmonisk oscillator} & a  & \hat{a}_\pm = \frac{1}{(2\hbar \omega m)^{1/2}}\left(\mp \hbar \pp ;x; + m\omega \hat{x} \right) & \hat{x} = \left( \frac{\hbar}{2m\omega} \right)^{1/2}\left( a_+ + a_- \right) & \hat{p} = i \left( \frac{\hbar m \omega}{2} \right)\left( a_+-a_- \right) & \E{V} = \E{\frac{1}{2}m\omega^2x^2} & a_-\psi_0 = 0\\
\psi_0 = \left(\frac{m\omega}{\pi\hbar}\right)^{1/4}e^{-m\omega x^2/(2 \hbar)}
\end{align*}
\begin{tabular}{l c r}
Variabel    &symbol  & observator\\
Posisjon: &$\hat{x}$ &$x$\\
bevegelsesmengde &$\hat{p}$ &$\frac{\hbar}{i} \pp;x;$\\
potensiell energi &$\hat{V}$ &$V(x)$\\
kinetisk energi &$\hat{K}$ &$-\frac{\hbar^2}{2m}\pp ^2;x^2;$\\
Hameltonian &$\hat{H}$ &$-\frac{\hbar^2}{2m} \pp ^2;x^2; + V(x)$\\
Total energi &$\hat{E}$ &$i \hbar \pp ;t;$
\end{tabular}
\end{document}

Thank you for your time.

Kind regards,

Marius

Answer 1

I think what you need is flalign*

\documentclass[9pt,norsk,a4paper]{article}
\usepackage[paper=a4paper, top=.1in,bottom=.1in,right=0.1in,left=0.1in]{geometry}
\usepackage[utf8]{inputenc}
\usepackage[norsk]{babel}
\usepackage{amsmath,amsthm}
\newcommand{\E}[1]{\left\langle #1 \right\rangle}
\def\dd #1;#2;{\frac{\mathrm{d} #1 }{\mathrm{d} #2 }}
\def\pp #1;#2;{\frac{\partial #1 }{\partial #2 }}

\setlength\parindent{0pt}
\begin{document}
\setlength{\abovedisplayskip}{0pt}
\setlength{\belowdisplayskip}{0pt}
\setlength{\abovedisplayshortskip}{0pt}
\setlength{\belowdisplayshortskip}{0pt}
\begin{flalign*}
&\intertext{\textbf{Harmonisk oscillator}}
& a   \hat{a}_\pm = \frac{1}{(2\hbar \omega m)^{1/2}}\left(\mp \hbar \pp ;x; + m\omega \hat{x} \right)  \hat{x} = \left( \frac{\hbar}{2m\omega} \right)^{1/2}\left( a_+ + a_- \right)  \hat{p} = i \left( \frac{\hbar m \omega}{2} \right)\left( a_+-a_- \right)  \E{V} = \E{\frac{1}{2}m\omega^2x^2}  a_-\psi_0 = 0 &\\
&\psi_0 = \left(\frac{m\omega}{\pi\hbar}\right)^{1/4}e^{-m\omega x^2/(2 \hbar)}&
\end{flalign*}
\begin{tabular}{l c r}
Variabel    &symbol  & observator\\
Posisjon: &$\hat{x}$ &$x$\\
bevegelsesmengde &$\hat{p}$ &$\frac{\hbar}{i} \pp;x;$\\
potensiell energi &$\hat{V}$ &$V(x)$\\
kinetisk energi &$\hat{K}$ &$-\frac{\hbar^2}{2m}\pp ^2;x^2;$\\
Hameltonian &$\hat{H}$ &$-\frac{\hbar^2}{2m} \pp ^2;x^2; + V(x)$\\
Total energi &$\hat{E}$ &$i \hbar \pp ;t;$
\end{tabular}
\end{document}