Hello, World

this is a test...

sourcecod
    <p> and another&hellip; again and again </p>    

\begin{tikzpicture}[scale=1.5]
  \SetVertexNormal[MinSize=12pt]
  \tikzset{VertexStyle/.append style=
    {inner sep=0pt,font=\footnotesize\sffamily}}
  \begin{scope}[rotate=-90]
    \grCirculant[RA=0.6,prefix=a]{5}{2}
  \end{scope}
  \begin{scope}[rotate=-18]
    \grEmptyCycle[RA=1.5,prefix=b]{5}{2}
  \end{scope}
  \begin{scope}[rotate=18]
    \grCycle[RA=2.5,prefix=c]{5}
  \end{scope}
  \EdgeIdentity{a}{b}{5} 
  \EdgeIdentity{b}{c}{5}
  {\tikzset{EdgeStyle/.append style = {blue,
      line width=3pt}}
  \EdgeDoubleMod{b}{5}{0}{1}{a}{5}{2}{1}{5}}
  {\tikzset{EdgeStyle/.append style = {style=-&gt;,
        line width=2pt}}
  \EdgeDoubleMod{c}{5}{0}{1}{b}{5}{1}{1}{5}}
\end{tikzpicture}

\(a+b\) and \(a\)

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