# “! Paragraph ended before \document was complete.<to be read again>\parl.69” [closed]

I'm writing up my latest assignment in LaTeX.

Unfortunately the copy I was given by my lecturer didn't work "out of the box" in LaTeX.

Original: http://pastebin.tlhiv.org/7m9aiLWK My version: http://pastebin.tlhiv.org/qgLkJU7T

So I'm attempting to make it work, but I've gotten stuck on this error:

! Paragraph ended before \document was complete.<to be read again>\parl.69

Many thanks to marcellus for helping me get this working (#latex on FreeNode):

\documentclass[a4paper,11pt]{article}
\usepackage[english]{babel}
\usepackage[pdftex]{graphicx}
\usepackage[all]{xy}
\usepackage{amsmath,amssymb,ntheorem}
\usepackage{multicol}

\title{}
\begin{document}

\begin{enumerate}
\item Negate the sentence $$\exists x\, \left(\forall y\, \left(Qx \wedge \left(\left(-Px \vee Qx\right) \rightarrow Qy\right)\right)\right)\,.$$

Your final answer may involve $-Px$, $-Qx$, $-Py$ and $-Qy$, but should not use $-$ in any other context.
%%%
\item  Write down the negation of the statement
$$\exists x \in \mathbb{Z},\left(\exists y \in \mathbb{Z}, \left(\left(\left(x+1\right)^2 > y^2\right) \rightarrow \left(x \ne y\right)\right)\right)$$
Which, if any, of the two statements is true?
%%%
\item Suppose the universal set $\mathcal{E} = \{x \in \mathbb{N} \mid\ x \le 12\}$. Let $A = \{x\ \mid\ x \text{\ is\ odd}\}$,
$B = \{x\ \mid\ x > 7\}$ and $C = \{x\ \mid\ x$ is\ divisible by $3\}$.\newline
Write the each of following sets in enumerated form, then depict each using a Venn diagram.
\begin{multicols}{2}
\begin{enumerate}
\item $A \cap B$
\item $B \cup C$
\item  $\overline{A}$
\item  $(A \cup \overline{B}) \cap C$
\item $\overline{A \cup C} \cup \overline{C}$
\end{enumerate}
\end{multicols}{2}
%%%
\item Show that $\overline{\overline{A} \cap B} = A \cup \overline{B}$, using the laws of sets.
%%%
\eject
\item In a class of 35 students, there are 12 students who can speak German and 5 students who can speak Japanese. If 2 students can speak both
of these languages, how many students in the class can speak neither language? Justify your answer by constructing some appropriate sets and
considering their cardinality.
%%%
\item With the aid of a Venn diagram, find an expression for the cardinality of $A \cup B \cup C$, for any sets $A,B,C$.

\item   Show that $G=(V,E)$ has no Hamiltonian cycle,
where $V=\{\,a,b,c,d,e,f,g\,\}$ and
$E=\{\,ab,ac,bc,bd,cd,de,df,ef,eg,fg\,\}$.

\item   Prove that $G=(V,E)$ has no Eulerian walk,

where
\begin{align}
V&=\{\,a,b,c,d,e,f\,\} \text{ and}\\
E&=\{\,ab,ac,bc,bd,ce,de,df,ef\,\}.
\end{align}

Show that it is possible to add one edge to $G$ to form a graph that does have an Eulerian walk, and find such a walk.

\item %\bookmark%
Here is a weighted graph. The numbers in the table give
the weight of the edge joining each pair of vertices. Use Prim's
algorithm to find a minimal spanning tree in this weighted graph.
Then use Kruskal's algorithm to do the same thing.
% $$% \paste{pics/assign2tbls}1 %$$
\end{enumerate}

The %\paste%
command above includes the output of the following code to typeset the table, produced with yet another tex variant.

% \boxedtables
% \sides
% \table
% \tss \g(10pt)\cmath\Black\g(10pt)\rt7{&\g(10pt)\cmath\g(10pt)}\\ \hl
% |b|c|d|e|f|g|h\\ \hl
% a|18|4|37|93|28|46|55\\ \hl
% b|\g(-10pt)\Gray\vrule width28pt\g(-10pt)\Black|47|12|9|51|72|63\\ \hl
% c|\xx2\g(-10pt)\Gray\vrule width57pt\g(-10pt)\Black|65|82|11|44|33\\ \hl
% d|\xx3\g(-10pt)\Gray\vrule width85pt\g(-10pt)\Black|94|17|61|56\\ \hl
% e|\xx4\g(-10pt)\Gray\vrule width114pt\g(-10pt)\Black|29|73|38\\ \hl
% f|\xx5\g(-10pt)\Gray\vrule width142pt\g(-10pt)\Black|31|5\\ \hl
% g|\xx6\g(-10pt)\Gray\vrule width171pt\g(-10pt)\Black|59\\ \hl
% \endtable

\end{document}
-

## closed as too localized by Stefan Kottwitz♦Sep 4 '11 at 15:16

This question is unlikely to help any future visitors; it is only relevant to a small geographic area, a specific moment in time, or an extraordinarily narrow situation that is not generally applicable to the worldwide audience of the internet. For help making this question more broadly applicable, visit the help center.If this question can be reworded to fit the rules in the help center, please edit the question.

<marcellus> pastebin.tlhiv.org/by7nIHex –  A T Aug 29 '11 at 5:16
This actually looks like plain TeX and not LaTeX. Using elements like $$...$$, \align ... \endalign, \table ... \endtable and \boxedtable (no environment-style coding) is a clue. You should ask your lecturer for the preamble and then try again using plain TeX. –  Werner Aug 29 '11 at 5:21
I have no problem with your example. Current TeXLive 2011 –  Herbert Aug 29 '11 at 5:36
I'm using MikTeX, perhaps I should switch! - Werner: Interesting, I might try downloading TeX and using it for future assignments. –  A T Aug 29 '11 at 5:38
no, what you have is a LaTeX document and not a TeX one. But it uses some old commands like $$...$$ which should be avoided. Using the environments from amsmath makes more sense –  Herbert Aug 29 '11 at 5:41