Koide Chōjūrō, Date of Birth, Place of Birth, Date of Death

    

Koide Chōjūrō

Japanese mathematician

Date of Birth: 16-Oct-1797

Place of Birth: Tokushima, Japan

Date of Death: 06-Oct-1865

Profession: mathematician

Nationality: Japan

Zodiac Sign: Libra


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About Koide Chōjūrō

  • Koide Chojuro (?? ???, October 16, 1797 – October 6, 1865), also known as Koide Shuke, was a Japanese mathematician in the Edo period.Koide was a student of Wada Nei.
  • Students of Koide included Fukuda Riken, who is also known as Fukuda Sen.The first extensive logarithmic table was published in 1844 by Koide Shuki.
  • This was twenty years after the death of Sakabe Kohan, whose Sampo Tenzan Shinan-roku (Treatise on Tenzan Algebra) in 1810 proposed the use of logarithmic tables.
  • Sakebe explained that "these tables save much labor, [but] they are but little known for the reason that they have never been printed in our country." This can be explained by the conventional thinking of the period.
  • For example, Koide exhibited a fixed point-of-view in his preface to Tan-i sampo in 1840, explaining: "Number dwells in the heavens and in the earth, but the arts are of human make, some being accurate and others not.
  • The minuteness of our mathematical work far surpasses that to be found in the West, because our power is a divine inheritance, fostered by the noble and daring spirit of a nation that is exalted over the other nations of the world."During the Tenpo era, Koide translated portions of Jérôme Lalande's work on astronomy.
  • He presented this work to the Astronomy Board as evidence of the superiority of the European calendar, but the effort produced no identifiable effect.
  • However, Koide's work and translations of other Western writers did indirectly affect the Tenpo calendar revision in 1842–1844.
  • Koide was part of the team of astronomers and mathematicians working on an improved lunar calendar system.
  • A great many errors had been found in the lunar calendar; and revisions were publicly adopted in 1844.
  • The new calendar was called the Tenpo-Jinin calendar.
  • It was in use in Japan until 1872 when the Gregorian calendar was adopted.

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