In many implementations of clustering, items in the collection are represented as vectors in an n-dimensional space.
在许多集群实现中，集合中的项目都是作为矢量表示在n维度空间中的。
This paper with elementary transformation of matrix discusses some properties of a set of vectors in finite dimensional vector space and the theory basis of this method is given.
该文利用矩阵的初等变换解决有限维向量空间中向量组的线性性质的有关问题，并给出了这种方法的理论依据。
This article, on the basis of four dimensional coordinates and four dimensional wave vectors of world space, proves the phrase constancy of electromagnetic waves.
作者在该文中从世界空间的四维坐标和四维波矢量出发，证明了电磁波的相位不变性。
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