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algebraic geometry

(Encyclopedia)algebraic geometry, branch of geometry, based on analytic geometry, that is concerned with geometric objects (loci) defined by algebraic relations among their coordinates (see Cartesian coordinates). ...

United Irishmen

(Encyclopedia)United Irishmen or United Irish Society, Irish political organization. It was founded at Belfast in 1791 by Theobald Wolfe Tone. Disgruntled by the use of English patronage to control Irish politics, ...

Upper Austria

(Encyclopedia)Upper Austria, Ger. Oberösterreich, province (1991 pop. 1,333,480), 4,625 sq mi (11,979 sq km), NW Austria. Linz is the capital. Bordering on Germany in the west and the Czech Republic in the north, ...

pronghorn

(Encyclopedia)pronghorn or prongbuck, hoofed herbivorous mammal, Antilocapra americana, of the W United States and N Mexico. Although it is often called the American, or prong-horned, antelope, the pronghorn is the...

Hidatsa

(Encyclopedia)Hidatsa hēdätˈsä [key], Native North Americans, also known as the Minitari and the Gros Ventre. Their language belongs to the Siouan branch of the Hokan-Siouan linguistic stock (see Native America...

Husayn ibn Ali

(Encyclopedia)Husayn ibn Ali ĭˈbən äˈlē [key], 1856–1931, Arab political and religious leader. In 1908 he succeeded as grand sherif of Mecca and thus became ruler of the Hejaz under the Ottoman Empire. In W...

John Birch Society

(Encyclopedia)John Birch Society, ultraconservative, anti-Communist organization in the United States. It was founded in Dec., 1958, by manufacturer Robert Welch, headquartered in Belmont, Mass., and named after Jo...

Sutlej

(Encyclopedia)Sutlej sŭtˈlĕj [key], longest of the five rivers of the Punjab, c.900 mi (1,450 km) long, rising in the Kailas Range, SW Tibet region of China, and flowing generally west, meandering through the Hi...

calculus of variations

(Encyclopedia)calculus of variations, branch of mathematics concerned with finding maximum or minimum conditions for a relationship between two or more variables that depends not only on the variables themselves, a...

Pickering, Timothy

(Encyclopedia)Pickering, Timothy, 1745–1829, American political leader and Revolutionary War army officer, b. Salem, Mass. He was admitted to the bar (1768) and played an active part in pre-Revolutionary activiti...