/** \brief embedding LaTeX into the documentation

- Fractions   \f$ \frac{1}{2} \f$
- Functions   \f$ \sin \alpha \cos \beta \tan \gamma \f$
- Indicies    \f$ \Psi_{i \sigma \mathbf k} \f$
- Bra and Ket \f$ \langle \Psi | H | \Psi \rangle \f$
- Matrices
  \f[
     \mathbf{M} = \left( 
                     \begin{matrix}
                        11 & 12 & 13 \\
                        21 & 22 & 23 \\
                        31 & 32 & 33
                     \end{matrix}
                  \right)
  \f]
- Branching assignments / arrays
  \f[
     S(i) = \left\{ 
               \begin{array}{cl}
                   -1   &   i < 0  \\
                    0   &   i = 0  \\
                    1   &   i > 0
             \end{array}
         \right.
  \f]

 */
  void latex ();
