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function

(Encyclopedia)function, in mathematics, a relation f that assigns to each member x of some set X a corresponding member y of some set Y; y is said to be a function of x, usually denoted f(x) (read “f of x ”)....

innate ideas

(Encyclopedia)innate ideas, in philosophy, concepts present in the mind at birth as opposed to concepts arrived at through experience. The theory has been advanced at various times in the history of philosophy to s...

Haring, Keith

(Encyclopedia)Haring, Keith hârˈĭng [key], 1958–90, American artist, b. Kutztown, Pa. He moved to New York City in 1975 and studied at the School of Visual Arts (1978–79). Fascinated with the 1970s graffiti ...

silicone

(Encyclopedia)silicone, polymer in which atoms of silicon and oxygen alternate in a chain; various organic radicals, such as the methyl group, CH3, are bound to the silicon atoms. Silicones, which are unusually sta...

Sotomayor, Sonia

(Encyclopedia)Sotomayor, Sonia sōtōmīyôrˈ [key], 1954–, associate justice of the U.S. Supreme Court (2009–), b. Bronx, N.Y., to Puerto Rican parents, grad. Princeton (B.A. 1976), Yale (J.D. 1979). She work...

Spratly Islands

(Encyclopedia)Spratly Islands, group of about 100 low islands and coral reefs in the central South China Sea, intersecting busy shipping lanes. The whole group is claimed by China, Taiwan, and Vietnam, and parts ar...

beta particle

(Encyclopedia)beta particle, one of the three types of radiation resulting from natural radioactivity. Beta radiation (or beta rays) was identified and named by E. Rutherford, who found that it consists of high-spe...

Law, William

(Encyclopedia)Law, William, 1686–1761, English clergyman, noted for his controversial, devotional, and mystical writings. One of the nonjurors, Law was deprived of his fellowship in Emmanuel College, Cambridge, a...

legislative apportionment

(Encyclopedia)legislative apportionment, subdivision of a political body (e.g., a state or province) for the purpose of electing legislative representatives. In the United States, the Constitution requires that Con...

Kitt Peak National Observatory

(Encyclopedia)Kitt Peak National Observatory, astronomical observatory located southwest of Tucson, Ariz.; it was founded in 1958 under contract with the National Science Foundation and is administered by the Assoc...