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  2. Paint by number - Wikipedia

    en.wikipedia.org/wiki/Paint_by_number

    The user selects the color corresponding to one of the numbers then uses it to fill in a delineated section of the canvas, in a manner similar to a coloring book. The kits were invented, developed and marketed in 1950 by Max S. Klein, an engineer and owner of the Palmer Paint Company in Detroit, Michigan, United States, and Dan Robbins, a ...

  3. Equitable coloring - Wikipedia

    en.wikipedia.org/wiki/Equitable_coloring

    The equitable chromatic number of a graph G is the smallest number k such that G has an equitable coloring with k colors. But G might not have equitable colorings for some larger numbers of colors; the equitable chromatic threshold of G is the smallest k such that G has equitable colorings for any number of colors greater than or equal to k. [2]

  4. List coloring - Wikipedia

    en.wikipedia.org/wiki/List_coloring

    For a graph G, let χ(G) denote the chromatic number and Δ(G) the maximum degree of G.The list coloring number ch(G) satisfies the following properties.. ch(G) ≥ χ(G).A k-list-colorable graph must in particular have a list coloring when every vertex is assigned the same list of k colors, which corresponds to a usual k-coloring.

  5. Urn problem - Wikipedia

    en.wikipedia.org/wiki/Urn_problem

    This is referred to as "drawing without replacement", by opposition to "drawing with replacement". multivariate hypergeometric distribution: the balls are not returned to the urn once extracted, but with balls of more than two colors. [3] geometric distribution: number of draws before the first successful (correctly colored) draw. [3]

  6. Elements of art - Wikipedia

    en.wikipedia.org/wiki/Elements_of_art

    A shape is a two-dimensional design encased by lines to signify its height and width structure, and can have different values of color used within it to make it appear three-dimensional. [2] [4] In animation, shapes are used to give a character a distinct personality and features, with the animator manipulating the shapes to provide new life. [1]

  7. Paint by number (disambiguation) - Wikipedia

    en.wikipedia.org/wiki/Paint_by_number...

    Paint by number is a painting technique where each area is marked with a number that corresponds to a particular color. Paint by number(s) may also refer to: Paint by Number, a music album by the band 3; Paint by Number Songs, an album by Sole "Paint by Numbers", a track on the album 24 Carrots by Al Stewart

  8. Graph coloring - Wikipedia

    en.wikipedia.org/wiki/Graph_coloring

    With only two colors, it cannot be colored at all. With four colors, it can be colored in 24 + 4 × 12 = 72 ways: using all four colors, there are 4! = 24 valid colorings (every assignment of four colors to any 4-vertex graph is a proper coloring); and for every choice of three of the four colors, there are 12 valid 3-colorings. So, for the ...

  9. Edge coloring - Wikipedia

    en.wikipedia.org/wiki/Edge_coloring

    By applying exact algorithms for vertex coloring to the line graph of the input graph, it is possible to optimally edge-color any graph with m edges, regardless of the number of colors needed, in time 2 m m O(1) and exponential space, or in time O(2.2461 m) and only polynomial space (Björklund, Husfeldt & Koivisto 2009).

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