射影平面上二阶曲线渐近线的几种求法

Several Methods to Solve Asymptotic Line of Curve of Second Order on the Projective Plane

本文介绍一般教课书里不曾介绍的常态二阶曲线渐近线方程的三种求法 :利用两直径共轭求法。

This Paper introduces three methods that have never appeared in the ordinary textbooks to solve the asymptotic equation of normalcy curve of second order: using two conjugate drams, involutory correspondence and trangent passing the center.