答案1
这是一个非常基本的解决方案,但也许它可以有所帮助:
\begin{tikzpicture}
\draw (0,0) node{+};
\draw (2,0) node{$\cdot$} node[right]{$\alpha$};
\draw (2,0) arc (0:30:2) node{$\cdot$} node[right]{$\beta$} ;
\draw (45:2) node{$\cdot$} node[right, above]{$\gamma$} arc (45:90:2) node{$\cdot$} node[above]{$\delta$} ;
\draw[dashed] (105:2) arc (105:345:2) ;
\end{tikzpicture}