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Kepler’s Heritage in the Space Age. 400th Anniversary of Astronomia Nova
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SYSNO ASEP 0349415 Document Type M - Monograph Chapter R&D Document Type Monograph Chapter Title Prosthaphaeresis – a Forgotten Algorithm Author(s) Porubský, Štefan (UIVT-O) SAI, RID Source Title Kepler’s Heritage in the Space Age. 400th Anniversary of Astronomia Nova. - Praha : Národní technické muzeum v Praze, 2010 / Hadravová A. ; Mahoney T.J. ; Hadrava P. - ISBN 978-80-7037-193-0 Pages s. 63-77 Number of pages 15 s. Number of copy 200 Number of pages 186 Language eng - English Country CZ - Czech Republic Keywords prostaphaeresis ; multiplication algorithm ; arithmetics of 16. century ; trigonometry ; Tycho Brahe ; Paul Wittich ; Johann Werner ; Jost Buergi ; Georg Joachim von Lauchen Rheticus ; Nicolaus Copernicus Subject RIV BA - General Mathematics R&D Projects 1ET200300529 GA AV ČR - Academy of Sciences of the Czech Republic (AV ČR) CEZ AV0Z10300504 - UIVT-O (2005-2011) Annotation Since the multiplication and division of large numbers is in general much more difficult to perform than addition and subtraction, various methods for reducing multiplication and division to the simpler operations of addition and subtraction were proposed to decrease the computational burden. One of the best-known such device is the use of logarithms. In this paper we summarize the history of a less known technique called prosthaphaeresis, which is based on the use of trigonometric formulas and trigonometric tables. Workplace Institute of Computer Science Contact Tereza Šírová, sirova@cs.cas.cz, Tel.: 266 053 800 Year of Publishing 2011
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