“Grégoire de Saint-Vincent… was a Jesuit, taught mathematics in Rome and Prag (1629-1631), and was afterwards called to Spain by Phillip IV as tutor to his son… He wrote two works on geometry [Principia Matheseos Univerales (1651); Exercitationum Mathematicarum Libri quinque (1657)], giving in one of them the quadrature of the hyperbola referred to its asymptotes, and showing that as the area increased in arithmetic series the abscissas increased in geometric series.”

p, 125
History of Mathematics (1923) Vol.1

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David Eugene Smith33

American mathematician 1860–1944

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History of Mathematics (1923) Vol.1

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This work is also noteworthy because it contains the first of an effort to represent the imaginary number graphically by the method now used. The effort stopped short of success but was an ingenious beginning.
History of Mathematics (1923) Vol.1

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David Eugene Smith33

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