two-way adjacency 维持一种部分邻居关系
Although retailers think they know how to position products in a way that will maximise sales, says Peter Hoyt of the In-store Marketing Institute, “the science of adjacency is not a science.”
尽管零售商认为他们直到如何摆放货品以获得最大销量，店内营销机构的彼特•赫伊特（Peter Hoyt）讲道，“相邻物品摆放的科学并不是科学。”
One helpful way to determine the isomorphism of graphs is to use elementary operations on a graph adjacency matrix so as to transform one matrix into another.
判断图同构的一种有用的方法是对图的邻接矩阵进行初等变换，变成另一个图的邻接矩阵。
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