Bartholomaeus Pitiscus

Bartholomaeus Pitiscus

:"Pitiscus" redirects here. For the crater, see Pitiscus (crater). For the scholar, see Samuel Pitiscus."

Bartholomaeus Pitiscus (also "Barthélemy, Bartholomeo", August 24, 1561 – July 2, 1613) was a 16th century German trigonometrist, astronomer and theologian who first coined the word Trigonometry.

Pitiscus was born to poor parents in Grünberg (Zielona Góra) in Lower Silesia, the part of Austrian-ruled Duchy of Glogau. He studied theology in Zerbst and Heidelberg. A Calvinist, he was appointed to teach the ten year-old Frederick IV, Elector Palatine of the Rhine, by Frederick's Calvinist uncle Johann Casimir of Simmern, as Frederick's father had died in 1583. Pitiscus was subsequently appointed court chaplain at Breslau (Wrocław) and court preacher to Frederick. Pitiscus supported Frederick's subsequent measures against the Roman Catholic Church.

Pitiscus achieved fame with his influential work written in Latin, called "Trigonometria: sive de solutione triangulorum tractatus brevis et perspicuus" (1595, first edition printed in Heidelberg), which introduced [Groundbreaking Scientific Experiments, Inventions, and Discoveries [http://books.google.com/books?id=MTXdplfiz-cC&pg=PA153&vq=pitiscus&sig=iUWyiMp6dVhUH74BC8LFt9id1JE] ] the word "trigonometry" to the English and French languages, translations of which had appeared in 1614 and 1619, respectively. It consists of five books on plane and spherical trigonometry. Pitiscus is sometimes credited with inventing the decimal point, the symbol separating integers from decimal fractions, which appears in his trigonometrical tables and was subsequently accepted by John Napier in his logarithmic papers (1614 and 1619).

Pitiscus edited "Thesaurus mathematicus" (1613) in which he improved the trigonometric tables of Georg Joachim Rheticus and also corrected Rheticus’ "Magnus Canon doctrinæ triangulorum".

Pitiscus died in Heidelberg. The lunar crater Pitiscus is named after him.

The classical scholar Samuel Pitiscus (1637-1727) was his nephew.

Literature


* S. Gottwald, H.-J. Ilgauds, K.-H. Schlote (Hrsg.): "Lexikon bedeutender Mathematiker". Verlag Harri Thun, Frankfurt a. M. 1990 ISBN 3-8171-1164-9

External links

* [http://www-history.mcs.st-andrews.ac.uk/Biographies/Pitiscus.html Biography MacTutor History of Mathematics archive]
* Allgemeine Deutsche Biographie [http://mdz.bib-bvb.de/digbib/lexika/adb/images/adb026/@ebt-link?target=idmatch(entityref,adb0260206)]


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