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CLAVIUS, CHRISTOPH, S.J. Algebra. 1609

CLAVIUS, CHRISTOPH, S.J. Algebra. [40], 383 pages. 4to, 201x152 mm, contemporary limp vellum dyed black, spine and front cover rubbed, lacking ties; marginal dampstaining, mainly at beginning end, blank portion of title excised and restored with some discoloration, early owner's scattered marginalia and extensive notes on rear endleaves. Geneva: Stephanus Gamonetus, 1609

  • Notes: Originally published the year before in Rome, "one of the best textbooks on the subject that had been written up to that time" (Smith); "his Algebra marks the appearance in Italy of the German plus (+) and minus (-) signs and of algebraic symbols used by Stifel. He was one of the very first to use parentheses to express aggregation of terms" (DSB). DSB III, 312; Smith, History of Mathematics I, 335.

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