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The diamond-free graphs are locally clustered: that is, they are the graphs in which every neighborhood is a cluster graph. Alternatively, a graph is diamond-free if and only if every pair of maximal cliques in the graph shares at most one vertex. The family of graphs in which each connected component is a cactus graph is downwardly closed ...
A circle trapezoid is the region in a circle that lies between two non-crossing chords and a circle trapezoid graph is the intersection graph of families of circle trapezoids on a common circle. There is an O ( n 2 ) {\displaystyle O(n^{2})} algorithm for maximum weighted independent set problem and an O ( n 2 log n ) {\displaystyle {O}(n ...
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Date/Time Thumbnail Dimensions User Comment; current: 01:52, 18 March 2012: 765 × 990 (62 KB): Yamaplos: alpha was still showing in the margin: 01:48, 18 March 2012
English: The diamond graph (left) and its line graph (right). The line graph has more symmetry than the diamond graph, making this an exception to the Whitney isomorphism theorem. The line graph has more symmetry than the diamond graph, making this an exception to the Whitney isomorphism theorem.
The U.S. is in peak flu season, as the Centers for Disease Control (CDC) says "seasonal influenza activity remains elevated and continues to increase across the country." Case counts vary by state ...
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Google aims to release commercial quantum computing applications within five years, Google's head of quantum told Reuters on Wednesday, in a challenge to Nvidia's predictions of a 20-year wait.