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William Oughtred (5 March 1574 – 30 June 1660), [1] also Owtred, Uhtred, etc., was an English mathematician and Anglican clergyman. [2] [3] [4] After John Napier discovered 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 ...
Clavis mathematicae (English: The Key of Mathematics) is a mathematics book written by William Oughtred, 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 following other wikis use this file: Usage on bg.wikipedia.org Уилям Отред; Usage on ca.wikipedia.org William Oughtred; Usage on de.wikipedia.org
In c. 1622, William Oughtred of Cambridge combined two handheld Gunter rules to make a device that is recognizably the modern slide rule. [15] Oughtred became involved in a vitriolic controversy over priority, with his one-time student Richard Delamain and the prior claims of Wingate. Oughtred's ideas were only made public in publications of ...
Any such decimal fraction, i.e.: d n = 0 for n > N, may be converted to its equivalent infinite decimal expansion by replacing d N by d N − 1 and replacing all subsequent 0s by 9s (see 0.999...). In summary, every real number that is not a decimal fraction has a unique infinite decimal expansion.
Many areas of mathematics began with the study of real world problems, before the underlying rules and concepts were identified and defined as abstract structures.For example, geometry has its origins in the calculation of distances and areas in the real world; algebra started with methods of solving problems in arithmetic.
Napier then calculated the products of these numbers with 10 7 (1 − 10 −5) L for L from 1 to 50, and did similarly with 0.9998 ≈ (1 − 10 −5) 20 and 0.9 ≈ 0.995 20. [32] These computations, which occupied 20 years, allowed him to give, for any number N from 5 to 10 million, the number L that solves the equation
The multiplication sign (×) was first used by William Oughtred and the division sign (÷) by Johann Rahn. René Descartes further advanced algebraic symbolism in La Géométrie (1637), where he introduced the use of letters at the end of the alphabet (x, y, z) for variables , along with the Cartesian coordinate system , which bridged algebra ...