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games, theory of

(Encyclopedia)games, theory of, group of mathematical theories first developed by John Von Neumann and Oskar Morgenstern. A game consists of a set of rules governing a competitive situation in which from two to n i...

Tucson

(Encyclopedia)Tucson to͞oˈsŏnˌ [key], city (1990 pop. 405,390), seat of Pima co., SE Ariz.; inc. 1877. Situated in a desert plain surrounded by mountains, Tucson is an important and growing transportation and t...

settlement house

(Encyclopedia)settlement house, neighborhood welfare institution generally in an urban slum area, where trained workers endeavor to improve social conditions, particularly by providing community services and promot...

Concord, cities, United States

(Encyclopedia)Concord kŏngˈkərd, kŏnˈkôrdˌ [key]. 1 city (2020 pop. 125,410), Contra Costa c...

Great Migration

(Encyclopedia)Great Migration, in U.S. history. 1 The migration of Puritans to New England from England, 1620–40, prior to the English civil war. As a result of the increasingly tyrannical rule of King Charles I ...

Stuart, Gilbert

(Encyclopedia)Stuart, Gilbert, 1755–1828, American portrait painter, b. North Kingstown, R.I., best known for his portraits of George Washington. Having shown an early talent for drawing, he became the pupil of C...

Qinghai

(Encyclopedia)Qinghai or Tsinghai both: chĭngˈhīˈ [key], province (2010 pop. 5,626,722), c.279,000 sq mi (722,797 sq km), W China. Xining is the capital. Qinghai lies in the Tibetan highlands at an average elev...

Gothic revival

(Encyclopedia)Gothic revival, term designating a return to the building styles of the Middle Ages. Although the Gothic revival was practiced throughout Europe, it attained its greatest importance in the United Stat...

Monitor and Merrimack

(Encyclopedia)Monitor and Merrimack, two American warships that fought the first engagement between ironclad ships. When, at the beginning of the Civil War, the Union forces abandoned the Norfolk Navy Yard at Ports...

Mississippi, state, United States

(Encyclopedia)CE5 Mississippi mĭsˌəsĭpˈē [key], one of the Deep South states of the United States. It is bordered by Alabama (E), the Gulf of Mexico (S), Arkansas and Louisiana, with most of that border fo...