Using graphical simulation, we observe the motion of parabolas inscribed and circumscribed about certain Poncelet triangle families. In doing so one is surprised by the fact that most parabolas' key objects such as vertex, directrix, focus, perspector, polar triangle, etc., will often sweep (or envelop) surprisingly simple curves, such as lines, circles, points, etc. We revisit some three-dozen such curious observations. Since most are without proof we very much welcome reader contributions.
翻译:使用图形模拟,我们观察了Parabolas对庞斯莱三角形某些家族的刻画和限制运动。在这样做的时候,我们感到惊讶的是,大多数Parabolas的关键对象,如顶点、直线、焦点、观察者、极三角等,往往会扫荡(或嵌入)令人惊讶的简单曲线,如线条、圆圈、点等。我们重温了大约三分之三的这种好奇的观察。因为大多数都没有证据,我们非常欢迎读者的贡献。