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A second unnamed parameter, optional, may be used to count several subsets of that category, as described in mw:Help:Magic words#Statistics. {{Category count only|Wikipedia articles with VIAF identifiers}} → 0 {{Category count only|Trees|all}} → 145 {{Category count only|Trees|pages}} → 122 {{Category count only|Trees|subcats}} → 23
In the study of graph coloring problems in mathematics and computer science, a greedy coloring or sequential coloring [1] is a coloring of the vertices of a graph formed by a greedy algorithm that considers the vertices of the graph in sequence and assigns each vertex its first available color. Greedy colorings can be found in linear time, but ...
A proper vertex coloring of the Petersen graph with 3 colors, the minimum number possible. In graph theory, graph coloring is a methodic assignment of labels traditionally called "colors" to elements of a graph. The assignment is subject to certain constraints, such as that no two adjacent elements have the same color.
An interval incidence coloring of G is an incidence coloring c such that for each vertex v of G the set () is an interval. [11] [12] The interval incidence coloring number of G is the minimum number of colors used for the interval incidence coloring of G. It is denoted by .
A 3-edge-coloring of the Desargues graph. In graph theory, a proper edge coloring of a graph is an assignment of "colors" to the edges of the graph so that no two incident edges have the same color. For example, the figure to the right shows an edge coloring of a graph by the colors red, blue, and green.
An edge coloring of is called a -rainbow coloring if for every set of vertices of , there is a rainbow tree in containing the vertices of . The k {\displaystyle k} -rainbow index rx k ( G ) {\displaystyle {\text{rx}}_{k}(G)} of G {\displaystyle G} is the minimum number of colors needed in a k {\displaystyle k} -rainbow coloring of G ...
The unique 3-edge-coloring of the generalized Petersen graph G(9,2) A uniquely edge-colorable graph is a k-edge-chromatic graph that has only one possible (proper) k-edge-coloring up to permutation of the colors. The only uniquely 2-edge-colorable graphs are the paths and the cycles.
This technique is used to good effect in the B&W images of Mandelbrot sets in the books "The Beauty of Fractals [9]" and "The Science of Fractal Images". [10] Here is a sample B&W image rendered using Distance Estimates: This is a B&W image of a portion of the Mandelbrot set rendered using Distance Estimates (DE)