Rainbow bee-eater Rainbow bee-eater The rainbow bee-eater ("Merops ornatus") is a near passerine bird in the bee-eater family Meropidae. It is the only species of Meropidae found in Australia. Rainbow bee-eaters are brilliantly coloured birds that grow to be 19–24 cm (max 28 cm) in length, including the elongated tail feathers. The upper back and wings are green in colour, and the lower back and under-tail coverts are bright blue. The undersides of the wings and primary flight feathers are red and tipped with black, and the tail is black to deep violet. The rainbow bee-eater's two central tail feathers are longer
Rainbow matching Rainbow matching In the mathematical discipline of graph theory, a rainbow matching in an edge-colored graph is a matching in which all the edges have distinct colors. Given an edge-colored graph "G" = ("V","E"), a rainbow matching "M" in "G" is a set of pairwise non-adjacent edges, that is, no two edges share a common vertex, such that all the edges in the set have distinct colors. A maximum rainbow matching is a rainbow matching that contains the largest possible number of edges. Rainbow matchings are of particular interest given their connection to transversals of Latin squares. For complete bipartite