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Gunter, Edmund

(Encyclopedia)Gunter, Edmund, 1581–1626, English mathematician and astronomer, educated at Westminster School, London, and Christ Church, Oxford. He invented (1618) a small portable quadrant and discovered (1622)...

Habash al-Hasib

(Encyclopedia)Habash al-Hasib häbäshˈ äl-häsēbˈ [key], d. c.870, Arab mathematician and astronomer. Habash al-Hasib was born in what is now Mary, Turkmenistan, and worked in Baghdad. He calculated tables of ...

Wallis, John

(Encyclopedia)Wallis, John wŏlˈĭs [key], 1616–1703, English mathematician. He was Savilian professor of geometry at Oxford from 1649. He systematized the use of formulas, introduced the symbol ∞ for infinity...

Bouguer, Pierre

(Encyclopedia)Bouguer, Pierre pyĕr bo͞ogĕrˈ [key], 1698–1758, French mathematician and hydrographer. He made some of the first photometric measurements, calculating the intensity of the light of the sun as co...

Mittag-Leffler, Magnus Gösta

(Encyclopedia)Mittag-Leffler, Magnus Gösta mängˈno͝os yöˈstä mĭtˈäg-lĕfˈlər [key], 1846–1927, Swedish mathematician. He was (1877–81) professor at Helsingfors (Helsinki) and at the Univ. of Stockho...

Viète, François

(Encyclopedia)Viète or Vieta, François fräNswäˈ vyĕt, vyātäˈ, vīēˈtə [key], 1540–1603, French mathematician. As a founder of modern algebra, he introduced the use of letters as algebraic symbols and ...

Ch'in Chiu-shao

(Encyclopedia)Ch'in Chiu-shao chĭn chyo͞o-shou [key], c.1202–1261, Chinese mathematician. He pioneered in the study of indeterminate analysis in his Mathematical Treatise in Nine Sections of 1247. The text exis...

Babbage, Charles

(Encyclopedia)Babbage, Charles băbˈĭj [key], 1792–1871, English mathematician and inventor. He devoted most of his life and expended much of his private fortune and a government subsidy in an attempt to perfec...

Nash, John Forbes, Jr.

(Encyclopedia)Nash, John Forbes, Jr., 1928–2015, American mathematician, b. Bluefield, W.Va., grad. Carnegie Institute of Technology (now Carnegie-Mellon Univ., B.A. and M.A. 1948), Ph.D. Princeton 1950. During a...

chaos theory

(Encyclopedia)chaos theory, in mathematics, physics, and other fields, a set of ideas that attempts to reveal structure in aperiodic, unpredictable dynamic systems such as cloud formation or the fluctuation of biol...