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Aepinus, Franz Ulrich Theodosius

(Encyclopedia)Aepinus, Franz Ulrich Theodosius fränts o͝olˈrĭkh tāˌōdōˈzēo͝os âpēˈno͝os [key], 1724–1802, German physicist. He studied at Jena and Rostock and taught mathematics at Rostock from 174...

Clavius, Cristoph

(Encyclopedia)Clavius, Cristoph krĭsˈtôf klāˈvēəs [key], 1537–1612, German astronomer and mathematician. He entered the Jesuit order in 1555 and studied at Coimbra and Rome. He taught mathematics at the Co...

Jacobi, Carl Gustav Jacob

(Encyclopedia)Jacobi, Carl Gustav Jacob kärl go͝osˈtäf yäˈkôp yäkôˈbē [key], 1804–51, German mathematician. He was an outstanding teacher and was professor of mathematics at Königsberg (1827–42) and...

Jevons, William Stanley

(Encyclopedia)Jevons, William Stanley jĕvˈənz [key], 1835–82, English economist and logician. After working in Australia as assayer to the mint, he taught at Owens College, Manchester, and University College, ...

Buffon, Georges Louis Leclerc, comte de

(Encyclopedia)Buffon, Georges Louis Leclerc, comte de zhôrzh lwē ləklĕrkˈ kôNt də büfôNˈ [key], 1707–88, French naturalist and author. From 1739 he was keeper of the Jardin du Roi (later the Jardin des ...

Al-Biruni, Abu Rayhan Muhammad ibn Ahmad

(Encyclopedia)Al-Biruni or Al Beruni, Abu Rayhan Muhammad ibn Ahmad äbo͞oˈ rīhänˈ məhămˈĭd ĭbˈən äˈməd ăl-bēro͞oˈnē, ăl bĕro͞oˈnē [key], b. 973, d. after 1050, Central Asian scientist. His...

Coleman, James S.

(Encyclopedia)Coleman, James S., 1926–95, American sociologist, b. Bedford, Ind. A graduate of Columbia (Ph.D., 1955), where he was influenced by Paul Lazarsfeld, Coleman achieved recognition with two studies on ...

Spengler, Oswald

(Encyclopedia)Spengler, Oswald spĕngˈglər, Ger. ôsˈvält shpĕngˈglər [key], 1880–1936, German historian and philosopher. His studies covered many fields, among them mathematics, science, philosophy, histo...

Piazzi, Giuseppe

(Encyclopedia)Piazzi, Giuseppe jo͞ozĕpˈpā pyätˈtsē [key], 1746–1826, Italian astronomer, a Theatine priest from 1769. He became (1781) professor of mathematics at the Univ. of Palermo, supervised construct...

commutative law

(Encyclopedia)commutative law, in mathematics, law holding that for a given binary operation (combining two quantities) the order of the quantities is arbitrary; e.g., in addition, the numbers 2 and 5 can be combin...