Is it possible to color the naturals with finitely many colors so that no Pythagorean triple is monochromatic? This question is even open for two colors. A natural strategy is to show that some small nonbipartite triple systems cannot be realized as a family of Pythagorean triples. It suffices to consider partial triple systems (PTS’s), and it is therefore natural to consider the Fano plane, th...

Anthocyanins are colored water-soluble pigments belonging to the phenolic group. The pigments are in glycosylated forms. Anthocyanins responsible for the colors, red, purple, and blue, are in fruits and vegetables. Berries, currants, grapes, and some tropical fruits have high anthocyanins content. Red to purplish blue-colored leafy vegetables, grains, roots, and tubers are the edible vegetables...

this article is an attempt to investigate the aesthetics of color themes in arabic poetry. as a means of psychological description, color is one of the manifestations of realism in poetic images. in the application of colors some mythical and civilized structures are portrayed in the culture of nations. since languages have their own specific organizations of colors, the author aims to measure ...

introduction: the use of computer vision technology has been highly successful in food classification in the past and it has continued this success in recent times. however, a number of opportunities to progress computer vision technology exist which are critically examined based on cost and feasibility. a range of hardware options are considered along with a range of software options. the econ...

A coloring of a tree is convex if the vertices that pertain to any color induce a connected subtree; a partial coloring (which assigns colors to some of the vertices) is convex if it can be completed to a convex (total) coloring. Convex colorings of trees arise in areas such as phylogenetics, linguistics, etc., e.g., a perfect phylogenetic tree is one in which the states of each character induc...

the manifest of value of colors in nazik al-malaika s poemsali piranishal *khadije hashemi**from the early times, colors have played an important role in developing poeticimages, and colorful images are the realistic and sensory aspects among poets. poetshave used colorful words to explore and explain the relationship between poeticimages and sometimes they have used colorful words to express t...

The enormous increase in phylogenetic information in recent years has allowed many old questions to be reexamined from a macroevolutionary perspective. We have recently considered evolutionary convergence in floral colors within pollination syndromes, using bird-pollinated species in Australia. We combined quantitative measurements of floral reflectance spectra, models of avian color vision, an...