论文标题
在线条排列，向后和向后然后到
On the Pappus arrangement of lines, forth and back and to the point
论文作者
论文摘要
本文的目的是研究$ 9 $线的著名Pappus配置及其双重布置。我们表明，通过将Pappus定理应用于双重布置，我们获得了与开始配置的初始数据相对应的配置。我们还考虑了一些额外事件的Pappus布置，并建立与这些事件并行的代数条件。
The purpose of this paper is to study the famous Pappus configuration of $9$ lines and its dual arrangement. We show among others that by applying the Pappus Theorem to the dual arrangement we obtain the configuration corresponding to the initial data of beginning configuration. We consider also the Pappus arrangements with some additional incidences and we establish algebraic conditions paralleling with these incidences.
