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matrix

(Encyclopedia)matrix, in mathematics, a rectangular array of elements (e.g., numbers) considered as a single entity. A matrix is distinguished by the number of rows and columns it contains. The matrix CE5 is a 2...

Cooley, Charles Horton

(Encyclopedia)Cooley, Charles Horton, 1864–1929, American sociologist, b. Ann Arbor, Mich., grad. Univ. of Michigan (B.A., 1887; Ph.D., 1894); son of Thomas M. Cooley. He taught in the sociology department at the...

Eysenck, Hans Jurgen

(Encyclopedia)Eysenck, Hans Jurgen häns yo͝orˈgən īˈsĕngk [key], 1916–97, British psychologist. Best known for his theory of human personality, Eysenck suggested that personality is biologically determined...

Fellenberg, Philipp Emanuel von

(Encyclopedia)Fellenberg, Philipp Emanuel von fēˈlĭp āmäˈno͞oĕl fən fĕlˈənbĕrkh [key], 1771–1844, Swiss educator and agriculturist. He purchased (1799) an estate, Hofwyl (near Bern), where he put int...

Frankel, Charles

(Encyclopedia)Frankel, Charles, 1917–79, American philosopher, b. New York City, grad. Columbia 1937, Ph.D., 1946. A teacher at Columbia since 1939, he became Old Dominion professor of philosophy and public affai...

Goddard, Robert Hutchings

(Encyclopedia)Goddard, Robert Hutchings, 1882–1945, American physicist and rocket expert, b. Worcester, Mass., grad. Worcester Polytechnic Institute (B.S., 1908), Ph.D. Clark Univ., 1911. From 1914 he was associa...

Giannotti, Donato

(Encyclopedia)Giannotti, Donato dōnäˈtō jän-nôtˈtē [key], 1492–1573, Italian political theorist, b. Florence. He studied at Pisa and in 1527 became secretary of the supreme council of the Florentine repub...

Gassendi, Pierre

(Encyclopedia)Gassendi, Pierre pyĕr gäsäNdēˈ [key], 1592–1655, French philosopher and scientist. A teacher and priest, Gassendi taught at Digne, Aix, and the Royal College at Paris and held several church of...

Fitzgerald, George Francis

(Encyclopedia)Fitzgerald, George Francis, 1851–1901, Irish physicist. Fitzgerald was born in Dublin and studied and taught at Trinity College there. He is best known for suggesting how the ether, by causing the c...

Ohlin, Bertil

(Encyclopedia)Ohlin, Bertil bĕrˈtĭl ōˈlĭn [key], 1899–1979, Swedish economist, b. Klippan. A professor at several Swedish universities, he wrote the influential Interregional and International Trade (1933, ...