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Clavis Mathematicae
''Clavis mathematicae'' (English: ''The Key of Mathematics'') is a mathematics book written by William Oughtred William Oughtred ( ; 5 March 1574 – 30 June 1660), also Owtred, Uhtred, etc., was an Kingdom of England, English mathematician and Anglican ministry, Anglican clergyman.'Oughtred (William)', in P. Bayle, translated and revised by J.P. Bernar ..., originally published in 1631 in Latin. It was an attempt to communicate the contemporary mathematical practices, and the European history of mathematics, into a concise and digestible form. The book contains an addition in its 1647 English edition, "Easy Way of Delineating Sun-Dials by Geometry", which had been written by Oughtred earlier in life. The original edition brought the autodidactic Oughtred acclaim amongst mathematicians, but the English-language reissue brought him celebrity, especially amongst tradesman who made use of the arithmetic in their labors. The book is also notable for using the symbol "x" for multi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mathematics
Mathematics is an area of knowledge that includes the topics of numbers, formulas and related structures, shapes and the spaces in which they are contained, and quantities and their changes. These topics are represented in modern mathematics with the major subdisciplines of number theory, algebra, geometry, and analysis, respectively. There is no general consensus among mathematicians about a common definition for their academic discipline. Most mathematical activity involves the discovery of properties of abstract objects and the use of pure reason to prove them. These objects consist of either abstractions from nature orin modern mathematicsentities that are stipulated to have certain properties, called axioms. A ''proof'' consists of a succession of applications of deductive rules to already established results. These results include previously proved theorems, axioms, andin case of abstraction from naturesome basic properties that are considered true starting points of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
William Oughtred
William Oughtred ( ; 5 March 1574 – 30 June 1660), also Owtred, Uhtred, etc., was an Kingdom of England, English mathematician and Anglican ministry, Anglican clergyman.'Oughtred (William)', in P. Bayle, translated and revised by J.P. Bernard, T. Birch and J. Lockman, ''A General Dictionary, Historical and Critical'', (James Bettenham, for G. Strachan and J. Clarke, London 1734/1739), Vol. VIIIpp. 77-86(Google). After John Napier invented logarithms and Edmund Gunter created the logarithmic scales (lines, or rules) upon which slide rules are based, Oughtred was the first to use two such scales sliding by one another to perform direct multiplication and division (mathematics), division. He is credited with inventing the Slide rule scale, slide rule in about 1622. He also introduced the "×" multiplication sign, symbol for multiplication and the abbreviations "sin" and "cos" for the sine and cosine functions. Clerical life Education The son of Benjamin Oughtred of Eton, Berkshi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1631 Books
Events January–March * January 23 – Thirty Years' War: Sweden and France sign the Treaty of Bärwalde, a military alliance in which France provides funds for the Swedish army invading northern Germany. * February 5 – Puritan leader Roger Williams arrives in Boston. * February 16 – The Reval Gymnasium is founded in Tallinn, Estonia, by Swedish king Gustavus II Adolphus. * February 20 – A fire breaks out in Westminster Hall, but is put out before it can cause serious destruction."Fires, Great", in ''The Insurance Cyclopeadia: Being an Historical Treasury of Events and Circumstances Connected with the Origin and Progress of Insurance'', Cornelius Walford, ed. (C. and E. Layton, 1876) p29 * March 7 – Ambrósio I Nimi a Nkanga, the ruler of the Kingdom of Kongo (in what is now Angola) dies after a reign of five years. * March 10 – Al Walid ben Zidan becomes the new Sultan of Morocco upon the death of Abu Marwan Abd al-Mal ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
