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Mathematician

Qin Jiushao

chin jee-oh-SHOW
Also Known As Ch'in Chiu-shao (Wade-Giles romanization); courtesy name Daogu
Medieval

Qin Jiushao was a Chinese mathematician who developed the Da yan shu, a complete general algorithm for solving the system of simultaneous congruences known today as the Chinese remainder theorem, publishing it in his 1247 treatise Mathematical Treatise in Nine Sections. This description is adapted from Wikipedia contributors under CC BY-SA 4.0; changes were made. https://creativecommons.org/licenses/by-sa/4.0/

Facts
Death Year
1261 1
Birthplace
Sichuan province, China (exact locality disputed: Wikipedia gives Ziyang, MacTutor gives Puzhou/Anyue) 1
Two reputable sources disagree on the exact locality within Sichuan; both agree on the province and circa 1202.
Death Place
Meizhou (now Meixian), Guangdong, China 1
Nationality / Culture
Chinese 1
Defining Contribution
Qin Jiushao provided the general solution now called the Chinese remainder theorem in his 1247 treatise, extending a special case first recorded centuries earlier in the Sunzi Suanjing. 2
Notable Work
Wrote the Shushu Jiuzhang (Mathematical Treatise in Nine Sections, 1247), containing the Chinese remainder theorem and a Horner-like method for solving polynomial equations. 1
Disputed
Birth Year
1202 1
Sources give the birth year only approximately, circa 1202.
Biography
Gender
Male 1
Qin Jiushao
Filter Results1 entry

Chinese Remainder Theorem

Qin Jiushao
Connections

In Branch

Algebra, Branches of Mathematics
Number Theory, Branches of Mathematics

Proofs Credited

Chinese Remainder Theorem, Theorems
Source Chinese Remainder Theorem (Wikipedia)
In the Other Atlases

Nationality

China

Also in Geography Atlas: the nationality of this subject.

Source Qin Jiushao (Wikipedia)Lead paragraph of the cited Wikipedia articletier 2
Quote, Lead paragraph of the cited Wikipedia article
Qin Jiushao (Chinese: 秦九韶; pinyin: Qín Jiǔsháo; Wade–Giles: Ch'in Chiu-shao, ca. 1202–1261), courtesy name Daogu (道古), was a Chinese mathematician, meteorologist, inventor, politician, and writer of the Southern Song dynasty.
Sources
1. Qin Jiushao (Wikipedia)
Wikimedia Foundation
  • lead paragraph and history section
    He is credited for discovering Horner's method
  • infobox
    Chinese mathematician
  • biographical summary
    was a Chinese mathematician, meteorologist, inventor, politician, and writer of the Southern Song dynasty.
  • works description
    Qin wrote Shushu Jiuzhang (Mathematical Treatise in Nine Sections) in 1247 CE. This treatise covered a variety of topics including indeterminate equations, and the numerical solution of certain polynomial equations up to the tenth degree.
  • infobox pinyin field
    Qin Jiushao
  • Lead section, gender reference
    He is credited for discovering Horner's method as well as inventing Tianchi basins, a type of rain gauge instrument used to gather meteorological data.
View the Source
2. Chinese Remainder Theorem (Wikipedia)
Wikimedia FoundationHistory
Quote, History
The result was later generalized with a complete solution called Da-yan-shu (大衍術) in Qin Jiushao's 1247 Mathematical Treatise in Nine Sections which was translated into English in early 19th century by British missionary Alexander Wylie.
View the Source

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