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Timotheus , Greek poet and musician

(Encyclopedia)Timotheus tĭmōˈthēəs [key], c.450–c.357 b.c., Greek poet and musician of Miletus. An innovator in music, he added a string to the kithara. Fragments of his dithyrambs and nomes remain. Euripide...

Bradwardine, Thomas

(Encyclopedia)Bradwardine, Thomas brădˈwərdēn [key], c.1295–1349, English mathematician, natural philosopher, and theologian. He was chaplain to Edward III (c.1338) and later archbishop of Canterbury. As a ma...

Syracuse, city, Italy

(Encyclopedia)Syracuse sĭrˈəkyo͞os, –kyo͞oz [key], Ital. Siracusa, city (1991 pop. 125,941), capital of Syracuse prov., SE Sicily, Italy, on the Ionian Sea. It has a port and is a market and tourist center. ...

Kircher, Athanasius

(Encyclopedia)Kircher, Athanasius ätänäˈzēo͝os kĭrkhˈər [key], 1601?–1680, German Jesuit archaeologist, mathematician, biologist, philologist, astronomer, musicologist, and physicist. One of the world's ...

pi

(Encyclopedia)pi, in mathematics, the ratio of the circumference of a circle to its diameter. The symbol for pi is π. The ratio is the same for all circles and is approximately 3.1416. It is of great importance in...

linear programming

(Encyclopedia)linear programming, solution of a mathematical problem concerning maximum and minimum values of a first-degree (linear) algebraic expression, with variables subject to certain stated conditions (restr...

Dedekind, Julius Wilhelm Richard

(Encyclopedia)Dedekind, Julius Wilhelm Richard yo͞olˈyo͝os vĭlˈhĕlm rĭkhˈärt dāˈdəkĭnt [key], 1831–1916, German mathematician. Dedekind studied at Göttingen under the German mathematician Carl Gauss...

Birkhoff, George David

(Encyclopedia)Birkhoff, George David, 1884–1944, American mathematician, b. Overisel, Mich.; father of Garrett Birkhoff. The son of a physician, he was educated at Harvard (B.A., 1905) and the Univ. of Chicago (P...

Boolean algebra

(Encyclopedia)Boolean algebra bo͞oˈlēən [key], an abstract mathematical system primarily used in computer science and in expressing the relationships between sets (groups of objects or concepts). The notational...

Lovelace, Ada

(Encyclopedia)Lovelace, Ada (Augusta Ada King-Noel, Countess of Lovelace), 1815–1852, English mathematician, b. London as Augusta Ada Byron. The daughter of the poet Lord Byron and Anne Isabella Milbanke, she was...