Qin Jiushao

died с 1261, MeizhouChinese mathematician who developed a method of solving simultaneous linear congruences.In 1219 he joined the army as captain of a territorial volunteer unit and helped quash a local rebellion. In 1233 he began his official government service. In his only mathematical book, now known as Shushu jiuzhang (1247; "Mathematical Writings in Nine Sections"), he introduced a method of solving systems of linear equations that was rediscovered in Europe about 1802, where it became known as the RuffiniHorner method. He later became provincial governor of Qiongzhou, but charges of corruption and bribery brought his dismissal in 1258.
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▪ Chinese mathematicianWadeGiles Ch'in ChiuShaoborn c. 1202, Puzhou [modern Anyue, Sichuan province], Chinadied c. 1261, Meizhou [modern Meixian, Guangdong province]Chinese mathematician who developed a method of solving simultaneous linear congruences.In 1219 Qin joined the army as captain of a territorial volunteer unit and helped quash a local rebellion. In 1224–25 Qin studied astronomy and mathematics in the capital Lin'an (modern Hangzhou) with functionaries of the Imperial Astronomical Bureau and with an unidentified hermit. In 1233 Qin began his official mandarin (government) service. He interrupted his government career for three years beginning in 1244 because of his mother's death; during the mourning period he wrote his only mathematical book, now known as Shushu jiuzhang (1247; “Mathematical Writings in Nine Sections”). He later rose to the position of provincial governor of Qiongzhou (in modern Hainan), but charges of corruption and bribery brought his dismissal in 1258. Contemporary authors mention his ambitious and cruel personality.His book is divided into nine “categories,” each containing nine problems related to calendrical computations, meteorology, surveying of fields, surveying of remote objects, taxation, fortification works, construction works, military affairs, and commercial affairs. Categories concern indeterminate analysis, calculation of the areas and volumes of plane and solid figures, proportions, calculation of interest, simultaneous linear equations, progressions, and solution of higherdegree polynomial equations in one unknown. Every problem is followed by a numerical answer, a general solution, and a description of the calculations performed with counting rods.The two most important methods found in Qin's book are for the solution of simultaneous linear congruences N ≡ r_{1} (mod m_{1}) ≡ r_{2} (mod m_{2}) ≡ … ≡ r_{n} (mod m_{n}) and an algorithm for obtaining a numerical solution of higherdegree polynomial equations based on a process of successively better approximations. This method was rediscovered in Europe about 1802 and was known as the RuffiniHorner method. Although Qin's is the earliest surviving description of this algorithm, most scholars believe that it was widely known in China before this time.Alexei Volkov* * *
Universalium. 2010.
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Qin Jiushao — (Chinese: 秦九韶; pinyin: Qín Jiǔshào; Wade–Giles: Ch’in Chiu Shao, ca. 1202–1261), courtesy name Daogu (道古), was a Chinese mathematician. Contents 1 Biography 2 Main work 3 References … Wikipedia
Qin Jiushao — (c. trad. : 秦九韶 ; c. simpl. : 秦九劭 ; pinyin : Qín Jiǔshào ; Wade Giles : Ch’in Chiu Shao, v. 1202–1261) est un mathématicien chinois connu pour avoir été le premier à publier une version du théorème des restes… … Wikipédia en Français
Qin Jiushao — Este artículo o sección necesita referencias que aparezcan en una publicación acreditada, como revistas especializadas, monografías, prensa diaria o páginas de Internet fidedignas. Puedes añadirlas así o avisar al autor p … Wikipedia Español
Qin Jiushao — ( 1202, Puzhou, China– 1261, Meizhou). Matemático chino que desarrolló un método para resolver congruencias lineales simultáneas. En 1219 se unió al ejército como capitán de una unidad territorial voluntaria y ayudó a aplastar una rebelión local … Enciclopedia Universal
Qin — can refer to: Contents 1 Chinese dynasties and states 2 People in history 3 People 4 Surnames 5 … Wikipedia
Qin — /chin/, n. Pinyin. Ch in. * * * (as used in expressions) Qin dynasty Qin Gui Qin Jiushao Qin tomb * * * ▪ musical instrument Wade Giles romanization ch in also called guqin (Chinese “ancient zi … Universalium
Qin — ► (221 206 a C) Dinastía china, fundadora del primer Imperio unificado. De esta dinastía deriva el nombre de China. Construyó la Gran Muralla. * * * (as used in expressions) Qin Gui Qin Jiushao Qin, dinastía Qin, tumba de … Enciclopedia Universal
Ch'in ChiuShao — Qin Jiushao Qin Jiushao (c. trad. : 秦九韶 ; c. simpl. : 秦九劭 ; pinyin : Qín Jiǔshào ; Wade Giles : Ch’in Chiu Shao, v. 1202–1261) est un mathématicien chinois connu pour avoir été le premier à publier une version… … Wikipédia en Français
Chinese mathematics — Mathematics in China emerged independently by the 11th century BC.[1] The Chinese independently developed very large and negative numbers, decimals, a place value decimal system, a binary system, algebra, geometry, and trigonometry. Many[who?]… … Wikipedia
mathematics, East Asian — Introduction the discipline of mathematics as it developed in China and Japan. When speaking of mathematics in East Asia, it is necessary to take into account China, Japan, Korea, and Vietnam as a whole. At a very early time in their… … Universalium