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本刊2010年10月(下半月)所载的这篇文章(以下简称“《抛物线》”)首先揭示有心圆锥曲线和抛物线在主要特征上的谐调一致,然后根据前一种曲线的性质推想后一种曲线的相应性质并给予证明,立意很好,内容也较充实,只是存在一些可议和不足之处.本文拟概述对有关问题的拙识,与该文作者交流并请同仁们指正.最古老的几何,即欧氏几何,所塑述的空间不存在无穷远点.中学的平面几何和立体几何都属于欧
This article, published in October 2010 (second half), first reveals that the conic and parabolic harmonics of the concentric and parabolic major features are the same, and then based on the nature of the previous curve The corresponding curve of the postulated a corresponding nature and to prove that the conception is very good, the content is also more substantial, but there are some suggestions and deficiencies.This article intends to summarize the knowledge of the problem, communicate with the author and please colleagues correct me The oldest geometry, the Euclidean geometry, does not exist at infinite infinity. The plane geometry and the solid geometry of the middle schools belong to the European