Indagationes Mathematicae ( IF 0.6 ) Pub Date : 2021-01-21 , DOI: 10.1016/j.indag.2021.01.004 Ian Doust , Gavin Robertson , Alan Stoneham , Anthony Weston
Graham and Winkler derived a formula for the determinant of the distance matrix of a full-dimensional set of points in the Hamming cube . In this article we derive a formula for the determinant of the distance matrix of an arbitrary set of points in . It follows from this more general formula that if and only if the vectors are affinely independent. Specializing to the case provides new insights into the original formula of Graham and Winkler. A significant difference that arises between the cases and is noted. We also show that if is the distance matrix of an unweighted tree on vertices, then where is the column vector all of whose coordinates are 1. Finally, we derive a new proof of Murugan’s classification of the subsets of that have strict 1-negative type.
中文翻译:
海明立方体子集的距离矩阵
Graham和Winkler推导了一个公式的维矩阵的行列式的行列式 点数 在汉明立方体 。在本文中,我们得出了距离矩阵行列式的公式 任意一组 点数 在 。从这个更一般的公式可以得出 当且仅当向量 亲密独立。专案提供了有关Graham和Winkler原始公式的新见解。案例之间存在重大差异 和 被注意到。我们还表明,如果 是上的未加权树的距离矩阵 顶点,然后 在哪里 是所有坐标均为1的列向量。最后,我们推导了Murugan对的子集分类的新证明。 具有严格的1负数类型。