[texhax] Having a Problem Compiling My Tex Document

[Susan Dittmar]

Hello Peter,

as you are new to LaTeX and this mailing list, I completed your minimal example. 
You made it easy for me, I have to admit, telling me all the packages needed:

\documentclass{article}
\usepackage{amssymb}
\usepackage{amsmath}
\usepackage{amsthm}
\usepackage{mathrsfs}
\begin{document}
\fbox{\parbox{\textwidth}{\vskip.2em
13. Let $K = \mathbb{Q)(\sqrt{m})$, let $p$ be a prime integer and let
$m \neq 1$ be a square free integer such that $m \equiv 1 \emph{mod} 4$).
\begin{enumerate}
\item[a.] Prove: $p\mathbb{Z}$ ramifies in $K/\mathbb{Q}$ if and only if
$p \mid m$.
\item[b.] Perform computations analogous to those made in section 4.8 of
the text. (Note that $2\mathbb{Z}$ will be unramified in $K/\mathbb{Q}$,
and care must be taken to distinguish between the split and inert cases
for $p = 2$.)
\end{enumerate}
\vskip.2em}}
{\it Solution.} \bigskip
%--------insert your solution to problem 2 below this line
\end{document}

And with this and some commenting out further lines (the whole enumerations is 
not needed for reproducing the error for example), I found your mistake fast:
right behing "13." you have \mathbb{Q) instead of \mathbb{Q}

Yours,

	Susan