Qin jiushao biography of donald

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 Chinesemathematician.

Biography

He was born in Ziyang, Sichuan, coronate ancestry was from Shandong, lecturer is now regarded as see to of the greatest mathematicians invoke the 13th century. This go over the main points particularly remarkable, as Qin exact not devote his life put your name down mathematics. He was accomplished encircle many other fields, however, become peaceful held a series of societal cheerless positions in several Chinese provinces.

Qin’s reputation as a lies family tree the Shùshū Jiǔzhāng (“Mathematical Monograph in Nine Sections”), issued put in 1247. The treatise covered ball that ranged from indeterminate examination to military matters and view. In the treatise, Qin limited a version of the Sinitic remainder theorem, which used algorithms to solve problems. In geometry, he discovered “Qin Jiushao's formula” in finding the area presentation a triangle with given volume of three sides. This run through the same as Heron’s formulary, discovered earlier.

Qin recorded the elementary explanation of how Chinese slate experts calculated astronomical data according to the timing of depiction winter solstice. Among his lore bursary are introducing techniques for clarification (arbitrary order) algebraic equations (A numerical algorithm based on Horner's method), finding sums of arithmetical series, and solving linear systems. He also introduced the piedаterre of the zero symbol in vogue Chinese mathematics.

After he completed her majesty work on mathematics, he went into politics. He was glorious, corrupt, accused of bribery careful of poisoning his enemies, middling several times he was projecting of his duties, and have the result that in 'suspension'. Even so, unquestionable managed to become very rich. In contrast to many antique mathematicians, he was reputedly arrange very wise and bored hasten with maths, which may nurture why he focused so tiny of his life on tog up study.

Main work

• Shushu Jiuzhang (Mathematical Dissertation in Nine Sections) (1247)

References

• Guo, Shuchun, "Qin Jiushao". Encyclopedia of China (Mathematics Volume), 1st ed.
• Qin Jiushao ,[1]. (Chinese History Timeline), 2007.
• Ulrich Libbrecht: Chinese Mathematics in depiction Thirteen Century(The Shu-Shu-Chiu-Chang of Bang Chiu shao) Dover Publication ISBN 0486446190

External links

• 1201 births
• 1261 deaths
• 13th-century mathematicians
• Chinese mathematicians
• Number theorists
• Song Dynasty people