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The CIELAB color space, also referred to as L*a*b*, is a color space defined by the International Commission on Illumination (abbreviated CIE) in 1976. [a] It expresses color as three values: L* for perceptual lightness and a* and b* for the four unique colors of human vision: red, green, blue and yellow. CIELAB was intended as a perceptually ...
The Cuban Missile Crisis, also known as the October Crisis ( Spanish: Crisis de Octubre) in Cuba, or the Caribbean Crisis ( Russian: Карибский кризис, romanized : Karibskiy krizis ), was a 13-day confrontation between the governments of the United States and the Soviet Union, when American deployments of nuclear missiles in Italy ...
For Roth's theorem on Diophantine approximation of algebraic numbers, see Roth's theorem. Roth's theorem on arithmetic progressions is a result in additive combinatorics concerning the existence of arithmetic progressions in subsets of the natural numbers. It was first proven by Klaus Roth in 1953. [1] Roth's theorem is a special case of ...
The square–cube law was first mentioned in Two New Sciences (1638). The square–cube law (or cube–square law) is a mathematical principle, applied in a variety of scientific fields, which describes the relationship between the volume and the surface area as a shape's size increases or decreases. It was first [dubious – discuss] described ...
Roots of unity can be defined in any field. If the characteristic of the field is zero, the roots are complex numbers that are also algebraic integers. For fields with a positive characteristic, the roots belong to a finite field, and, conversely, every nonzero element of a finite field is a root of unity.
Here the function is . In algebra, a cubic equation in one variable is an equation of the form. in which a is nonzero. The solutions of this equation are called roots of the cubic function defined by the left-hand side of the equation.
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Almost all of the Caribbean islands are in the Caribbean Sea, with only a few in inland lakes. The largest island is Cuba. Other sizable islands include Hispaniola, Jamaica, Puerto Rico, North Andros, and Trinidad. Some of the smaller islands are referred to as a rock or reef. Islands are listed in alphabetical order by sovereign state.