#enumerateline-numbering
I'm trying to enumerate the lines within my proof, based on the section that I'm working in. For instance I would like something that:
Thereom 2.2 My theorem
Proof: Statement
(2.11) equation for my proof
(2.12) equation for my proof (continued)
Q.E.D
Where the 2 is the section number and the numbers after the dot are the line numbers.
I would define the items using the functionality of the enumitem package. This would require you to label the items that you want to reference (using \label) and reference them accordingly using \ref.
In the minimal example below the list of equivalent items are constructed using a label that is formatted as (<arabic#>) with an equivalent referencing output. This is done using the optional arguments to the enumerate environment ([label=..,ref=..]). The command \Implies{<ref1>}{<ref2>} constructs $\text{\ref{<ref1>}}\implies\text{\ref{<ref2>}}$, for consistency and ease-of-use.
\documentclass{article}
\usepackage{enumitem}% http://ctan.org/pkg/enumitem
\usepackage{amsthm}% http://ctan.org/pkg/amsthm
\usepackage{amsmath}% http://ctan.org/pkg/amsmath
\newtheorem{theorem}{Theorem}
\newcommand{\Implies}[2]{$\text{\ref{#1}}\implies\text{\ref{#2}}$}% X => Y
\begin{document}
\begin{theorem}
The following are equivalent:
\begin{enumerate}[label=(\arabic*),ref=(\arabic*)]
\item Statement 1 \label{statement1}
\item Statement 2 \label{statement2}
\item Statement 3 \label{statement3}
\end{enumerate}
\end{theorem}
\begin{proof}
\Implies{statement1}{statement2}: Proof if~\ref{statement1} then~\ref{statement2}.
\Implies{statement2}{statement3}: Proof if~\ref{statement2} then~\ref{statement3}.
\Implies{statement3}{statement1}: Proof if~\ref{statement3} then~\ref{statement1}.
\end{proof}
\end{document}
The main approach here is to allow referencing of listed items so you don't have to worry about whether you're changing the appearance and have to subsequently modify your (hard-)coded proof. Additionally, you only need to label those entries you would be referencing. In this case, all statements were labelled.
The package lineno provides the possibility to add frame numbers inside boxes by internallinnumbers
Here the resulting mwe:
\documentclass[letterpaper,12pt]{book}
\usepackage{lineno}
\usepackage{lipsum}
\newsavebox{\fmbox}
\newenvironment{fmpage}[1]
{\begin{lrbox}{\fmbox}\begin{minipage}{#1}}
{\end{minipage}\end{lrbox}\fbox{\usebox{\fmbox}}}
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\begin{document}
Introduction: \\
\lipsum[1]
\begin{center}
\begin{fmpage}{5in}
\vspace{.25cm} % Maybe look into frame sep
{ %
Satellites \\
\modulolinenumbers[2]
\begin{internallinenumbers}
When you watch the news and see pictures of weather from around the United States
or the world, you are seeing data from NOAA's environmental satellites. NOAA's
environmental satellites provide data from space to monitor the Earth to analyze the
coastal waters, relay life-saving emergency beacons, and track tropical storms and
hurricanes.
\end{internallinenumbers}
\ldots and then there are some multiple-choice questions about it.
}
\vspace{.25cm}
\end{fmpage} \end{center}%
\end{document}
Best Answer
A simple method is to locally redefine the labels for the enumerate environment.
To avoid repeatedly making the redefinition, you can use a new environment.