Sandbox

http://math.chapman.edu/structuresold/files/Sandbox.pdf

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\newtheorem{definition}{Definition}
\newtheorem*{morphisms}{Morphisms}
\newtheorem*{basic_results}{Basic Results}
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\begin{document}
\begin{definition}
A \emph{semigroup} is a structure $\mathbf{S}=\langle S,\cdot\rangle$ such that

$\cdot$ is \emph{associative}:  $(x\cdot y)\cdot z=x\cdot (y\cdot z)$

Remark: 
Click on the 'Edit' link, then make any changes you like and save the page. 

(This is just a shortened sample of the semigroups page. 
Feel free to try anything you like here.)
\end{definition}

\begin{table}[h]
\begin{properties} (\href{http://math.chapman.edu/cgi-bin/structures?Properties}{description})

\begin{tabular}{|ll|}\hline
  Classtype         &   variety\\\hline
  Equational theory &   decidable\\\hline
\end{tabular}
\end{properties}
\end{table}
\begin{finite_members} $f(n)=$ number of members of size $n$.

$\begin{array}{lr}
  f(1)= &1\\
  f(2)= &\\
  f(3)= &\\
\end{array}$
\end{finite_members}
\hyperbaseurl{http://math.chapman.edu/structures/files/}
\parskip0pt
\begin{subclasses}\ 

  \href{Commutative_semigroups.pdf}{Commutative semigroups} 

\end{subclasses}
\begin{superclasses}\ 

  \href{Monoids.pdf}{Monoids} 

\end{superclasses}

\begin{thebibliography}{10}

\bibitem{Ln19xx}

\end{thebibliography}

\end{document}
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