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English: Gray, blue, red, green, light green, black graph papers with 1 cm–0.5 cm–1 mm grids (page size: A4) in printable PDF format. Date 25 July 2013, 18:04:17
The triangle-free graphs are diamond-free graphs, since every diamond contains a triangle. 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.
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The columns 'vertices', 'edges', 'radius', 'diameter', 'girth', 'P' (whether the graph is planar), χ (chromatic number) and χ' (chromatic index) are also sortable, allowing to search for a parameter or another.
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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.
English: Gray, blue, red, green, black graph papers with 1 inch–0.5 inch–1/12 inch grids (page size: US Letter) in printable PDF format. Date 25 July 2013, 18:02:35
Printable version; Page information; Get shortened URL; ... For instance, this 1-page embedding of the diamond graph has pagewidth 3. Date: 15 April 2016: Source: Own ...