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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.
(In decimal arithmetic, only reciprocals of multiples of 2 and 5 have finite decimal expansions.) Also, unlike the Egyptians, Greeks, and Romans, the Babylonians had a true place-value system, where digits written in the left column represented larger values, much as in the decimal system. They lacked, however, an equivalent of the decimal ...
Maximum accuracy for standard linear slide rules is about three decimal significant digits, while scientific notation is used to keep track of the order of magnitude of results. English mathematician and clergyman Reverend William Oughtred and others developed the slide rule in the 17th century based on the emerging work on logarithms by John ...
William Oughtred (1575–1660), inventor of the circular slide rule. A collection of slide rules at the Museum of the History of Science, Oxford. The slide rule was invented around 1620–1630, shortly after John Napier's publication of the concept of the logarithm.
Leonhard Euler was responsible for many of the notations currently in use: the functional notation (), e for the base of the natural logarithm, for summation, etc. [5] He also popularized the use of π for the Archimedes constant (proposed by William Jones, based on an earlier notation of William Oughtred). [6]
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In c. 1622, William Oughtred combined two handheld Gunter rules to make a calculating device that was essentially the first slide rule. [ 9 ] The logarithm function became a staple of mathematical analysis, but printed tables of logarithms gradually diminished in importance in the twentieth century as multiplying mechanical calculators and ...