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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 are roots of th...

Moscow, city, Russia

(Encyclopedia)Moscow mŏsˈkou, –kō [key], Rus. Moskva, city (1991 est. pop. 8,802,000), capital of Russia and of Moscow region and the administrative center of the Central federal district, W central European R...

Hancock, Winfield Scott

(Encyclopedia)Hancock, Winfield Scott, 1824–86, Union general in the American Civil War, b. Montgomery Square, near Norristown, Pa. He served with distinction in the Mexican War and was chief quartermaster on the...

amulet

(Encyclopedia)amulet ămˈyəlĭt [key], object or formula that credulity and superstition have endowed with the power of warding off harmful influences. The use of the amulet to avert danger and to dispel evil has...

Oakland

(Encyclopedia)Oakland, city (1990 pop. 372,242), seat of Alameda co., W Calif., on the eastern side of San Francisco Bay; inc. 1852. Together with San Francisco and San Jose, the city comprises the fourth largest m...

Key West

(Encyclopedia)Key West, city (1990 pop. 24,832), seat of Monroe co., S Fla., on an island at the southwestern extremity of the Florida Keys; inc. 1828. About 150 mi (240 km) from Miami (but only 90 mi/145 km from C...

Tudor style

(Encyclopedia)Tudor style, descriptive of the English architecture and decoration of the first half of the 16th cent., prevailing during the reigns (1485–1558) of Henry VII, Henry VIII, Edward VI, and Mary I. It ...

Belasco, David

(Encyclopedia)Belasco, David bəlăsˈkō [key], 1853–1931, American theatrical manager and producer, b. San Francisco. He was actively connected with the theater from his youth, and while associated with Dion Bo...

Ulaanbaatar

(Encyclopedia)Ulaanbaatar or Ulan Bator both: o͞olänˈ bäˈtôr [key] [Mongolian,=red hero], Chinese Kulun, city (2010 est. pop. 1,500,000), capital of the Republic of Mongolia, E central Mongolia, on the Tola R...