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For any connected graph G, it is possible to construct its universal covering graph. [3] This is an instance of the more general universal cover concept from topology; the topological requirement that a universal cover be simply connected translates in graph-theoretic terms to a requirement that it be acyclic and connected; that is, a tree. The ...
The normal distribution is NOT assumed nor required in the calculation of control limits. Thus making the IndX/mR chart a very robust tool. Thus making the IndX/mR chart a very robust tool. This is demonstrated by Wheeler using real-world data [ 4 ] , [ 5 ] and for a number of highly non-normal probability distributions.
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A w-vertex-cover is a multiset of vertices ("multiset" means that each vertex may appear several times), in which each edge e is adjacent to at least w e vertices. Egerváry's theorem says: In any edge-weighted bipartite graph, the maximum w-weight of a matching equals the smallest number of vertices in a w-vertex-cover.
[3] In statistics and data visualization, edge clique covers of a graph representing statistically indistinguishable pairs of variables are used to produce compact letter displays that assist in visualizing multiple pairwise comparisons, by assigning a letter or other visual marker for each clique and using these to provide a graphical ...
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