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Cantor
German mathematician, founder of set theory. A student of K. Weierstrass in Berlin, he wrote his doctoral thesis at age 22. His work in number theory built on that of C. F. Gauss. Set theory and transfinite numbers were his major life's work. One of his most important discoveries was a way to list the rational numbers so as to prove them countable. His investigations into such listings led him to the classification of transfinite numbers, which are, informally speaking, degrees of infinity. Cantor's work was fundamental to the development of functional analysis and topology, as well as to the philosophy of mathematics, in particular regarding the question "What is a number?"


cantor
In Judaism and Christianity, an ecclesiastical official in charge of music or chants. In Judaism, the hazan (cantor) leads liturgical prayer and chanting. In medieval Christianity, the cantor had charge of a cathedral's music--specifically, of supervising the choir's singing. The term also designated the head of a college of church music.


Manitoba
Province (pop., 1996: 1,145,000), central Canada. It is bounded by Nunavut, Hudson Bay, Ontario, Saskatchewan, and by Minnesota and N. Dakota; its capital is Winnipeg. Three-fifths of its territory is covered by the Canadian Shield, an area of rocks, forests, and rivers. The region was first inhabited by the Inuit (Eskimo) and by the Cree, Assiniboin, and Ojibwa Indians. The Hudson's Bay Co. opened Manitoba to European influence, and the region became a focus of French and British competition for Canadian fur trade dominance; it was ceded by France to Britain in 1763. The Mé tis rebellion led to the passage of the Manitoba Act in 1870, making it the fifth province of the Dominion of Canada. Steamboat and rail transportation opened the province to settlers from Europe in the late 19th cent. Though much of the economy is based on farming, lumbering and mining, heavy industry has become important to an expanding Winnipeg.


monitor
Ironclad warship originally designed for use in shallow harbors and rivers to blockade the Confederate states in the Amer. Civil War. The original ironclad, built by J. Ericsson, was named Monitor. Its innovative design included minimal exposure above the waterline, a heavily armored deck and hull, and a revolving gun turret. The inconclusive Battle of the Monitor and Merrimack (1862) was the first between ironclad warships. Never seaworthy, the Monitor sank during a gale off Cape Hatteras that same year, but the U.S. Navy built many improved monitors during the war. The British navy kept its monitors in service as late as World War II.

Top words beginning with J: jissom, juxtapapillary, jct, jacobitism, jincamas, juggle, jives, jots, jampan, jees, jamrosade, japanophobia, jawboner, jackies, jetbeads, jauntiness, jebus, jumamoto, jailed, johansen

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