TeX - LaTeX Asked on August 7, 2021
I want to nicely put equations and equations arrays inside a box or a frame.
I also like to align objects in align
environment like in the eqnarray
environment [r|c|l], see example below.
Working example:
documentclass{article}[A4]
usepackage{amsmath,amssymb}
newenvironment{bbox}
{parsmallskipcenteringbegin{lrbox}{0}%
begin{minipage}[c]{0.99textwidth}}
{end{minipage}end{lrbox}%
framebox[0.99textwidth]{usebox{0}}%
parmedskip
ignorespacesafterend}
begin{document}
title{Box test}
I want to box equations. For a simple equation:
begin{equation} label{1}
boxed{ 1 + 2 = pi - 0.14 quad implies quad pi in mathbb{Q} }
end{equation}
Eqnarray:
begin{eqnarray}
1 + 2 = pi - 0.14 & implies & pi in mathbb{Q}
end{eqnarray}
Align:
begin{align}
1 + 2 = pi - 0.14 & implies & pi in mathbb{Q}
end{align}
I want the texttt{align} to be aligned like texttt{eqnarray}, how to do that?
For align and eqnarray the texttt{boxed} won't work,
begin{verbatim}
begin{align}
boxed{ 1 + 2 = pi - 0.14 & implies & pi in mathbb{Q} }
end{align}
end{verbatim}
Using the environment ``bbox'' it seems to work but has some space in the top so it looks a little bit ugly:
begin{bbox}
begin{align}
1 + 2 = pi - 0.14 & implies & pi in mathbb{Q}
end{align}
end{bbox}
I want it to look like equation eqref{1}
How to do that?
Edit: What about multiline equations?
Multiline:
begin{align}
Aboxed{ 1 + 2 = pi - 0.14 implies & pi in mathbb{Q}
3 ne pi implies & pi in mathbb{R} }
end{align}
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