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For instance, R 2 (3) = 6, that is, if the edges of the graph K 6 are 2-colored, there will always be a monochromatic triangle. A path in an edge-colored graph is said to be a rainbow path if no color repeats on it. A graph is said to be rainbow colored if there is a rainbow path between any two pairs of vertices.
A rangoli on the occasion of Diwali, Goa, India A rangoli made with flowers on the occasion of Onam Rangoli at Delhi, India Rangoli is an art form that originates from the Indian subcontinent, in which patterns are created on the floor or a tabletop using materials such as powdered limestone, red ochre, dry rice flour, coloured sand, quartz powder, flower petals, and coloured rocks.