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Long Eaton

(Encyclopedia) Long Eaton, town (1991 pop. 42,285), Derbyshire, central England. A number of products are manufactured, including synthetics, electrical equipment, and railroad carriages.

Post, C. W.

(Encyclopedia) Post, C. W. (Charles William Post), 1854–1914, American food manufacturer and developer of breakfast cereals, b. Springfield, Ill. He worked (1872–86) selling agricultural machines and…

identity theft

(Encyclopedia) identity theft, the use of one person's personal information by another to commit fraud or other crimes. The most common forms of identity theft occur when someone obtains another…

factor

(Encyclopedia) factor, in arithmetic, any number that divides a given number evenly, i.e., without any remainder. The factors of 12 are 1, 2, 3, 4, 6, and 12. Similarly in algebra, any one of the…

Brough, Louise

(Encyclopedia) Brough, Louise (Louise Brough Clapp)Brough, Louisebrŭf [key], 1923–2014, American tennis player, b. Oklahoma City. A champion in the 1940s and 50s, renowned for her powerful serve-and-…

root, in mathematics

(Encyclopedia) root, in mathematics, number or quantity r for which an equation f(r)=0 holds true, where f is some function. If f is a polynomial, r is called a root of f; for example, r=3 and r=−4…

Erdös, Paul

(Encyclopedia) Erdös, PaulErdös, Paulĕrˈdös [key], 1913–96, Hungarian mathematician, b. Budapest. A child prodigy, he was mostly home-schooled by his parents—both teachers of mathematics—until he…

exponent

(Encyclopedia) exponent, in mathematics, a number, letter, or algebraic expression written above and to the right of another number, letter, or expression called the base. In the expressions x2 and…

division, in mathematics

(Encyclopedia) division, fundamental operation in arithmetic; the inverse of multiplication. Division may be indicated by the symbol ÷, as in 15 ÷ 3, or simply by a fraction, 15/3. The number that is…

Moore's Law

(Encyclopedia) Moore's Law, a projection of semiconductor manufacturing trends made by Gordon E. Moore, cofounder of the Intel Corp., in a 1965 magazine article. He observed that the number of…