align environment without any explicit alignments points (given by &) right justifies the equations in the block. They can be left justified by putting & at the beginning of each equation. Is there any way to left justify them without starting &-s? Maybe some special environment or option? It seems to be an extra work to tell the compiler again and again that I want left alignment on each line.
[Tex/LaTex] Left-align all equations in a block
alignequationshorizontal alignment
Related Solutions
I propose you this layout:
\documentclass[a4paper,10pt,fleqn]{article}
\usepackage{amsmath, amssymb, graphicx}
\setlength{\mathindent}{0pt}
\usepackage[margin=.5in, showframe]{geometry}
\usepackage{titling}
\pretitle{\begin{center}\Large\bfseries}
\posttitle{\end{center}\vspace{2ex}}
\title{Advanced Plasma Physics}
\preauthor{\noindent\large Homework2\hfill}
\postauthor{}
\author{heptacle}
\date{}
\begin{document}
\maketitle
\section*{1.}
\begin{alignat*}{2}
\phi & =-\frac{z}{\sqrt{\pi}}\int_{\infty}^{-\infty}\frac{e^{-t^2}}{t-z}\,dt\\
\phi ' & =\frac{\phi}{z}-\frac{z}{\sqrt{\pi}}\int_{\infty}^{-\infty}\!\frac{e^{-t^2}}{(t-z)^2}\,dt\\
& =\frac{\phi}{z}+\frac{2z}{\sqrt{\pi}}\int_{\infty}^{-\infty}\frac{te^{-t^2}}{t-z}\,dt & \quad & \text{\footnotesize(integration\ by\ parts)}\\
& =\frac{\phi}{z}+\frac{2z}{\sqrt{\pi}}\int_{\infty}^{-\infty}\Bigl(1+\frac{z}{t-z}\Bigr)e^{-t^2} dt\\
& =\frac{\phi}{z}+2z-2z\phi\\
& =\frac{\phi}{z}+2z(1-\phi) \\
&\boldsymbol{\therefore} & \phi' &=\Bigl(\frac{1}{z}-2z\Bigr)\phi+2z
\end{alignat*}
\end{document}
Best Answer
Left justification is the default (with
fleqn) for thegather-environment. So simply use that, after allalignis for aligning at user-specified points, which is not what you need.