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  2. Rainbow coloring - Wikipedia

    en.wikipedia.org/wiki/Rainbow_coloring

    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 ...

  3. Category:NP-complete problems - Wikipedia

    en.wikipedia.org/wiki/Category:NP-complete_problems

    Print/export Download as PDF; Printable version; In other projects ... Radio coloring; Rainbow coloring; Rainbow matching; Rainbow-independent set; Reverse engineering;

  4. ROYGBIV - Wikipedia

    en.wikipedia.org/wiki/ROYGBIV

    ROYGBIV is an acronym for the sequence of hues commonly described as making up a rainbow: red, orange, yellow, green, blue, indigo, and violet. When making an artificial rainbow, glass prism is used, but the colors of "ROY-G-BIV" are inverted to VIB-G-YOR".

  5. Glass Gem Corn - Wikipedia

    en.wikipedia.org/wiki/Glass_gem_corn

    It is a variety of what people call "Indian corn" and is considered unique due to its rainbow coloring. [1] [2] Glass Gem Corn has been called the "poster child" for the return to heirloom seeds. It became popular on social media in 2012 due to its unique appearance. [3] Enthusiasts save its seeds to plant again and to trade with others. [2]

  6. Category:Graph coloring - Wikipedia

    en.wikipedia.org/wiki/Category:Graph_coloring

    Print/export Download as PDF ... Pages in category "Graph coloring" The following 82 pages are in this category, out of 82 total. ... Rainbow coloring;

  7. Rainbow matching - Wikipedia

    en.wikipedia.org/wiki/Rainbow_matching

    In 1967, H. J. Ryser conjectured that, when n is odd, every proper edge-coloring of K n,n has a rainbow matching of size n. [2] In 1975, S. K. Stein and Brualdi conjectured that, when n is even, every proper edge-coloring of K n,n has a rainbow matching of size n – 1. [3] (it is known that a rainbow matching of size n need not exist in this ...

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