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Dexippus

(Encyclopedia)Dexippus (Publius Herennius Dexippus) dĕksĭpˈəs [key], fl. 253–276, Greek historian of the Roman period. He commanded Greek troops in an unsuccessful attempt to halt a Gothic invasion in 262. Hi...

Dioscorides, Pedanius

(Encyclopedia)Dioscorides, Pedanius pĭdānˈēəs dīəskôrˈĭdēz [key], fl. 1st cent. a.d., Greek physician of Anazarbus, Cilicia. While traveling as a surgeon in the Roman army, he collected information on th...

Napier, John

(Encyclopedia)Napier, John nāˈpēr, nəpērˈ [key], 1550–1617, Scottish mathematician and theologian. He invented logarithms and wrote Mirifici logarithmorum canonis descriptio (1614), containing the first log...

Klein, Christian Felix

(Encyclopedia)Klein, Christian Felix klīn [key], 1849–1925, German mathematician. He is noted for his work in geometry and on the theory of functions. His Erlangen program (1872) for unifying the diverse forms ...

Knuth, Donald Ervin

(Encyclopedia)Knuth, Donald Ervin no͞oth, kəno͞othˈ [key], 1938–, American mathematician and computer scientist, b. Milwaukee, Wis., grad. Case Institute of Technology (B.S. and M.S., 1960) and California Ins...

Gödel, Kurt

(Encyclopedia)Gödel, Kurt göˈdəl [key], 1906–78, American mathematician and logician, b. Brünn (now Brno, Czech Republic), grad. Univ. of Vienna (Ph.D., 1930). He came to the United States in 1940 and was na...

Dee, John

(Encyclopedia)Dee, John, 1527–1608, English mathematician and occultist. He was educated at Cambridge. Accused of practicing sorcery against Queen Mary I, he was acquitted and later was a favorite of Queen Elizab...

Hamilton, Sir William Rowan

(Encyclopedia)Hamilton, Sir William Rowan, 1805–65, Irish mathematician and astronomer, b. Dublin. A child prodigy, he had mastered 13 languages by the age of 13 and was still an undergraduate when he became prof...

Helmholtz, Hermann Ludwig Ferdinand von

(Encyclopedia)Helmholtz, Hermann Ludwig Ferdinand von hĕrˈmän lo͞otˈvĭkh fĕrˈdēnänt fən hĕlmˈhôlts [key], 1821–94, German scientist. Although known especially as a physicist and biologist, he was al...

Ochakiv

(Encyclopedia)Ochakiv əchäˈkəf [key], city, S Ukraine, on the Dnieper-Buh estuary and on the Black Sea. It is the center of an agricultural district and a seaport with fishing industries. In the 7th and 6th cen...