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\documentclass[leqno]{article}
\usepackage{url}
\usepackage{graphicx}
\usepackage{amsmath}
\usepackage{amssymb}
\usepackage{amsfonts}
\usepackage{bm}
\usepackage{gellmu}
\usepackage[margin=100bp,nohead]{geometry}
\setlength{\parskip}{6bp}
\setlength{\parindent}{0bp}
\thispagestyle{empty}
\title{An Example Document}
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\date{January 21, 1994}
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\newlength{\centerskip}
\setlength{\centerskip}{\topsep}
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\newcommand{\tdbc}[1]{\hsf\textbf{#1}\hsf}
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\setlength{\labelwidth}{0.03\linewidth}
\setlength{\leftmargin}{0.06\linewidth}
\setlength{\itemindent}{0bp}
\setlength{\itemsep}{-6bp}
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}{\end{list}}
\newenvironment{Menulist}{
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\setlength{\leftmargin}{0.06\linewidth}
\setlength{\itemindent}{0bp}
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}{\end{list}}
\newenvironment{toclist}{\normalsize
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\author{Leslie Lamport}
\begin{document}
\begin{center}\LARGE\bfseries{}
An Example Document
\end{center}
\begin{center}\Large\bfseries{}
\textsl{Leslie Lamport}
\end{center}
\begin{center}
\large\bfseries{}
January 21, 1994
\end{center}

\medskip
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\par{This is an example input file. \   Comparing it with
the output it generates can show you how to
produce a simple document of your own. \ 

}

\section*{1\ \ \label{SU-1}Ordinary Text}
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\par{The ends  of words and sentences are marked
  by   spaces. It  doesn't matter how many
spaces    you type; one is as good as 100. \   The
end of   a line counts as a space. \ 
}
\par{One   or more   blank lines denote the  end
of  a paragraph. \ 
}
\par{Since any number of consecutive spaces are treated
like a single one, the formatting of the input
file makes no difference to
      \LaTeX{},                 %cs0
but it makes a difference to you. \   When you use
\LaTeX{}, making your input file as easy to read
as possible will be a great help as you write
your document and when you change it. \   This sample
file shows how you can add comments to your own input
file. \ 
}
\par{Because printing is different from typewriting,
there are a number of things that you have to do
differently when preparing an input file than if
you were just typing the document directly. \ 
Quotation marks like
       ``this''
have to be handled specially, as do quotes within
quotes:
       ``\,`this'             %cs0
        is what I just
        wrote, not  `that'\,''. \ 
}
\par{Dashes come in three sizes: an
       intra-word
dash, a medium dash for number ranges like
       1--2,
and a punctuation
       dash---like
this. \ 
}
\par{A sentence-ending space should be larger than the
space between words within a sentence. \   You
sometimes have to type special commands in
conjunction with punctuation characters to get
this right, as in the following sentence. \ 
       Gnats, gnus, etc.\ all   %cs0
       begin with G\@. \           %cs0
You should check the spaces after periods when
reading your output to make sure you haven't
forgotten any special cases. \   Generating an
ellipsis
       \ldots{}\                %cs0
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with the right spacing around the periods requires
a special command. \ 
}
\par{\LaTeX{}\ interprets some common characters as
commands, so you must type special commands to
generate them. \   These characters include the
following:
       \$ \& \% \# \{ and \}. \ 
}
\par{In printing, text is usually emphasized with an
       \emph{italic}
type style. \ 
}
\par{\emph{   A long segment of text can also be emphasized
   in this way. \   Text within such a segment can be
   given \emph{additional} emphasis. \ }
}
\par{It is sometimes necessary to prevent \LaTeX{}\ from
breaking a line where it might otherwise do so. \ 
This may be at a space, as between the ``Mr.'' and
``Jones'' in
       ``Mr.~Jones'',         %cs0
or within a word---especially when the word is a
symbol like
       \emph{itemnum}
that makes little sense when hyphenated across
lines. \ 
}
\par{Footnotes\footnote{This is an example of a footnote.}
pose no problem. \ 
}
\par{\LaTeX{}\ is good at typesetting mathematical formulas
like
       \,\( x-3y + z \, = \, 7 \)\,
or
       \,\( a_{1} > x^{2n} + y^{2n} > x' \)\,
or
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       \,\( (A, B) \, = \, \sum_{i} a_{i} b_{i} \)\,. \ 
The spaces you type in a formula are
ignored. \   Remember that a letter like
       \(x\)                    %cs0
is a formula when it denotes a mathematical
symbol, and it should be typed as one. \ 

}

\section*{2\ \ \label{SU-2}Displayed Text}
\par{Text is displayed by indenting it from the left
margin. \   Quotations are commonly displayed. \   There
are short quotations
\begin{quote}

This is a short a quotation. \   It consists of a
   single paragraph of text. \   See how it is formatted. \ 

\end{quote}
and longer ones. \ 
\begin{quotation}
This is a longer quotation. \   It consists of two
   paragraphs of text, neither of which are
   particularly interesting. \ 

   This is the second paragraph of the quotation. \   It
   is just as dull as the first paragraph. \ 
\end{quotation}
Another frequently-displayed structure is a list. \ 
The following is an example of an \emph{itemized}
list. \ 
\begin{itemize}

\item  This is the first item of an itemized list. \ 
         Each item in the list is marked with a ``tick''. \ 
         You don't have to worry about what kind of tick
         mark is used. \ 

   

\item  This is the second item of the list. \   It
         contains another list nested inside it. \   The inner
         list is an \emph{enumerated} list. \ 
         \begin{enumerate}

\item  This is the first item of an enumerated
                  list that is nested within the itemized list. \ 

            

\item  This is the second item of the inner list. \ 
                  \LaTeX{}\ allows you to nest lists deeper than
                  you really should. \ 
         
\end{enumerate}
         This is the rest of the second item of the outer
         list. \   It is no more interesting than any other
         part of the item. \ 
   

\item  This is the third item of the list. \ 
\end{itemize}
You can even display poetry. \ 
\begin{verse}
There is an environment
    for verse  \\{}  %cs0
   Whose features some poets  %cs0
   will curse. \ 

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   For instead of making \\{} Them do \emph{all} line breaking,  \\{} It allows them to put too many words on a line when they'd rather be
   forced to be terse. \ 
\end{verse}
}
\par{Mathematical formulas may also be displayed. \   A
displayed formula
is
one-line long; multiline
formulas require special formatting instructions. \ 
   \[  (\Gamma{}, \psi{}') \ = \  x'' + y^{2} + z_{i}^{n}\]
Don't start a paragraph with a displayed equation,
nor make one a paragraph by itself. \ 

}
\end{document}
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