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nonlinear dynamics

(Encyclopedia)nonlinear dynamics, study of systems governed by equations in which a small change in one variable can induce a large systematic change; the discipline is more popularly known as chaos (see chaos theo...

lyric

(Encyclopedia)lyric, in ancient Greece, a poem accompanied by a musical instrument, usually a lyre. Although the word is still often used to refer to the songlike quality in poetry, it is more generally used to ref...

Macaulay, Thomas Babington, 1st Baron

(Encyclopedia)Macaulay, Thomas Babington, 1st Baron, 1800–1859, English historian and author, b. Leicestershire, educated at Cambridge. After the success of his essay on Milton in the Edinburgh Review (Aug., 1825...

Hubble, Edwin Powell

(Encyclopedia)Hubble, Edwin Powell, 1889–1953, American astronomer, b. Marshfield, Mo. He did research (1914–17) at Yerkes Observatory, and joined (1919) the staff of Mt. Wilson Observatory, Pasadena, Calif., o...

sonnet

(Encyclopedia)sonnet, poem of 14 lines, usually in iambic pentameter, restricted to a definite rhyme scheme. There are two prominent types: the Italian, or Petrarchan, sonnet, composed of an octave and a sestet (rh...

West, Paul Noden

(Encyclopedia)West, Paul Noden, 1930–2015, British-American writer, b. Eckington, Derbyshire, England, B.A. Univ. of Birmingham (1950), M.A. Columbia (1953). After serving in the Royal Air Force and teaching at M...

Grateful Dead, The

(Encyclopedia)Grateful Dead, The, American rock music group formed in 1965 by guitarists Jerry Garcia, 1942–95, and Bob Weir, 1947–, harmonica player Ron “Pigpen” McKernan, 1945–73, bassist Phil Lesh, 194...

Lieberson, Peter

(Encyclopedia)Lieberson, Peter. 1946–2011, American composer, b. New York City. Lieberson studied composition at Columbia, where his teachers included modernists Milton Babbitt and Charles Wuorinen. While in scho...

Klaus, Václav

(Encyclopedia)Klaus, Václav klous [key], 1941–, Czech politician. A staunch free-market economist and leader (1991–2002) of the Civic Democratic party, he has been one of Eastern Europe's more influential pos...

epic

(Encyclopedia)epic, long, exalted narrative poem, usually on a serious subject, centered on a heroic figure. The earliest epics, known as primary, or original, epics, were shaped from the legends of an age when a n...