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He used capital vowels for the unknown quantities and capital consonants for the known, thus being able to express several unknowns and several knowns.

— David Eugene Smith History of Mathematics (1925)

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More quotes by David Eugene Smith

With the coming of the Jesuits in the 16th century, and the consequent introduction of Western science, China lost interest in her native algebra...

History of Mathematics (1925)

He... gave thirteen forms of the cubic which have positive roots, these having already been given by Omar Kayyam.

History of Mathematics (1925)

He states that the root of x^3 + 6x = 20 isx = \sqrt[3]{\sqrt{108} + 10} - \sqrt[3]{\sqrt{108} - 10}.

History of Mathematics (1925)

The excellent work of Tropfke is an example of the tendency to break away from the mere chronological recital of facts.

History of Mathematics (1923)

The Arabs contributed nothing new to the theory, but al-Khowârizmî (c. 825) states the usual rules, and the same is true of his successors.

History of Mathematics (1925)

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