摘要
用形数结合的观点和条件极值法，研究了四维空间的两三维空间的相交、平行和垂直的相互关系计算出两平行三维空间的距离。
By taking the strategy of uniting geometry with algebra and using the method of minimal value, the relationships of intersection, parallels and perpendicular between two three dimensional spaces in four-dimensional descriptive geometry are investigated and the calculation formula of the distance between two three-dimensional spaces are given.
出处
《山东建材学院学报》
2000年第1期64-65,共2页
Journal of Shandong Institute of Building Materials
关键词
四维空间
三维空间
相交
平行
垂直
距离
four-dimensional space
three-dimensional space
intersection
parallels
perpendicular
distance
