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The rainbow connection number of a graph is the minimum number of colors needed to rainbow-connect , and is denoted by (). Similarly, the strong rainbow connection number of a graph G {\displaystyle G} is the minimum number of colors needed to strongly rainbow-connect G {\displaystyle G} , and is denoted by src ( G ) {\displaystyle {\text{src ...
Any family of rn – r + 1 fractional-matchings (=colors) of size at least n in an r-partite hypergraph has a rainbow-fractional-matching of size n. [18]: Thm.1.7 The rn – r + 1 is the smallest possible: the extremal case is when n = r – 1 is a prime power , and all colors are edges of the truncated projective plane of order n .
A color in the RGB color model is described by indicating how much of each of the red, green, and blue is included. The color is expressed as an RGB triplet (r,g,b), each component of which can vary from zero to a defined maximum value. If all the components are at zero the result is black; if all are at maximum, the result is the brightest ...
The Rainbow Goblins. Thames & Hudson. ISBN 978-0-500-27759-1. Graham, Lanier F., ed. (1976). The Rainbow Book. Berkeley, California: Shambhala Publications and The Fine Arts Museums of San Francisco. (Large format handbook for the Summer 1976 exhibition The Rainbow Art Show which took place primarily at the De Young Museum but also at other ...
The conventional gradient colors of the rainbow symbol. 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
Category: Rainbow colors. ... Articles relating to ROYGBIV, the sequence of hues commonly described as making up a rainbow: red, orange, yellow, green, ...
In mathematics, particularly in combinatorics, A rainbow problem is a problem in which there are several objects of different colors, and the goal is to select a single object of each color. Pages in category "Rainbow problems"
An edge coloring with k colors is called a k-edge-coloring and is equivalent to the problem of partitioning the edge set into k matchings. The smallest number of colors needed for an edge coloring of a graph G is the chromatic index, or edge chromatic number, χ ′ (G). A Tait coloring is a 3-edge coloring of a cubic graph.