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Johann Rahn

Index Johann Rahn

Johann Rahn (Latinised form Rhonius) (10 March 1622 – 25 May 1676) was a Swiss mathematician who is credited with the first use of the division symbol, ÷ (obelus) and the therefore sign, ∴. The symbols were used in Teutsche Algebra, published in 1659. [1]

10 relations: Christoph Scriba, Florian Cajori, History of mathematical notation, Jackie Stedall, John Pell, Mathematician, Moritz Cantor, Obelus, Pell's equation, Therefore sign.

Christoph Scriba

Christoph J. Scriba (October 6, 1929 – July 26, 2013) was a German historian of mathematics.

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Florian Cajori

Florian Cajori (February 28, 1859 – August 14 or 15, 1930) was a Swiss-American historian of mathematics.

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History of mathematical notation

The history of mathematical notation includes the commencement, progress, and cultural diffusion of mathematical symbols and the conflict of the methods of notation confronted in a notation's move to popularity or inconspicuousness.

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Jackie Stedall

Jacqueline Anne "Jackie" Stedall (4 August 1950 – 27 September 2014) was a British mathematics historian.

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John Pell

John Pell (1 March 1611 – 12 December 1685) was an English mathematician and political agent abroad.

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Mathematician

A mathematician is someone who uses an extensive knowledge of mathematics in his or her work, typically to solve mathematical problems.

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Moritz Cantor

Moritz Benedikt Cantor (23 August 1829 – 10 April 1920) was a German historian of mathematics.

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Obelus

An obelus (symbol: ÷ or †, plural: obeluses or obeli) is a symbol consisting of a short horizontal line with a dot above and another dot below, and in other uses it is a symbol resembling a small dagger.

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Pell's equation

Pell's equation (also called the Pell–Fermat equation) is any Diophantine equation of the form where n is a given positive nonsquare integer and integer solutions are sought for x and y. In Cartesian coordinates, the equation has the form of a hyperbola; solutions occur wherever the curve passes through a point whose x and y coordinates are both integers, such as the trivial solution with x.

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Therefore sign

In logical argument and mathematical proof, the therefore sign (∴) is generally used before a logical consequence, such as the conclusion of a syllogism.

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Redirects here:

Johann Heinrich Rahn, Rhonius.

References

[1] https://en.wikipedia.org/wiki/Johann_Rahn

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