Wolfgang Haken
Wolfgang Haken
German-American mathematician who in 1976 submitted the first mathematical proof that depended on computer assistance. This proof, that the four-color map conjecture was true, was a watershed event in mathematics, ushering in an era of proofs increasingly dependent on computers for their success. The four-color map conjecture, which had defied proof for over a century, stated that it was impossible to construct a map that needed more than four colors to make all adjacent regions a different color.
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Warning Coloration , warning coloration (aposematic coloration) The conspicuous markings of an animal that make it easily recognizable and warn would-be predators that it… Color Blindness , The condition known as color blindness is a defect in vision that causes problems in distinguishing between certain colors. The condition is usually… Color Therapy , Chromotherapy, the practice of healing with color, emerged in the nineteenth century as the object of scientific speculation and research, out of whi… Colored People (south Africa) , Cape Coloreds
Cape Coloreds
ALTERNATE NAMES: Coloureds, Coloreds
POPULATION: 3.6 million
LANGUAGE: Afrikaans; English
1 • INTRODUCTION
South Africa's… Color , Color
Color is a complex and fascinating subject. Several fields of science are involved in explaining the phenomenon of color. The physics of light… Protective Coloration , protective coloration, coloration or color pattern of an animal that affords it protection from observation either by its predators or by its prey. T…
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Wolfgang Haken