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THE r-REDUCED CUTTING NUMBERS AND CUTTING POWERS OF CYCLES, SEQUENCES OF CYCLES AND GRAPHS

机译:r减少的切割数和切割力,循环序列和图

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In (1), the authors defined the cutting number of a cycle and of a graph. In this paper, we extend their results in two ways. First, we define the r-reduced cutting number of a cycle within a graph and the r-reduced cutting number of a graph. We find the minimum and maximum number of edges in a graph on n vertices and r-reduced cutting number k. Second, we extend the definition of r-reduced cutting number of a cycle within a graph to include edge-disjoint collections of cycles, which we call progressions. The cutting power (at level r) of a graph is the length of the shortest progression with r-reduced cutting number at least 2. We determine the cutting powers at level 1 of complete graphs. Finally, we find a formula for the maximum number of edges in a graph on n vertices with cutting power 2 and with a progression of length 2 having r-reduced cutting number k.
机译:在(1)中,作者定义了一个循环和一个图形的切割编号。在本文中,我们通过两种方式扩展其结果。首先,我们定义图内循环的r减少切削数和图的r减少切削数。我们在n个顶点和r减少的切割数k上的图中找到边的最小和最大数目。其次,我们将图形中一个循环的r减少切割数的定义扩展为包括边沿不相交的循环集合,我们称其为级数。图的切割能力(在级别r)是r减少的切割数至少为2的最短进程的长度。我们确定完整图的级别1的切割能力。最后,我们找到了一个公式,该公式用于在n个具有切割能力2且长度为2的级数上具有r减少的切割数k的顶点上的图形中的最大边数。

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