astro.wikisort.org - ResearcherAbul-Hasan Kūshyār ibn Labbān ibn Bashahri Daylami (971–1029), also known as Kūshyār Daylami (Persian: کوشیار دیلمی), was an Iranian[1][2] mathematician, geographer, and astronomer from Daylam, south of the Caspian Sea, Iran.
Career
His main work was probably done about the beginning of the eleventh century, and seems to have taken an important part in the elaboration of trigonometry. For example, he continued the investigations of Abul Wáfa, and devoted much space to this in his zij (or collection of tables) az-Zīj al-Jamī wal-Baligh ("the comprehensive and mature tables"), which incorporated the improved values of the planetary apogees observed by al-Battani.[3] The tables were translated into Persian before the end of the century. He wrote also an astrological introduction and an arithmetic treatise Kitab fi usul hisab al-hind (Principles of Hindu Reckoning, extant in Arabic and Hebrew).
He was the teacher of Ahmad Nasawi. He is thought to have died in Baghdad.
See also
- List of Iranian scientists
- zij
References
- Hockey, Thomas (2014). Biographical encyclopedia of astronomers. New York: Springer. p. 1074. ISBN 9781441999184.
Kushyar ibn Labban was an eminent Iranian astronomer known for his work on astronomical handbooks (zijes) in addition to his work in mathematics and astrology.
- Selin, Helaine (2008). Encyclopaedia of the history of science, technology, and medicine in non-western cultures. Berlin New York: Springer. p. 241. ISBN 9781402049606.
Another important early treatise that publicized decimal numbers was Iranian mathematician and astronomer Kūshyār ibn Labbān’s (fl. 1000) Kitāb fī usūl hisāb al-hind (Principles of Hindu Reckoning), a leading arithmetic textbook.
- E. S. Kennedy, A Survey of Islamic Astronomical Tables, (Transactions of the American Philosophical Society, New Series, 46, 2), Philadelphia, 1956, pp. 3, 34-5.
Sources
- H. Suter: Mathematiker und Astronomen der Araber (83, 235, 1900; 168, 1902).
- M Levey and M Petruck (trs.), Kushyar ibn Labban, Principles of Hindu reckoning (Madison, 1965).
External links
Astronomy in the medieval Islamic world |
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Works |
- Arabic star names
- Islamic calendar
- Aja'ib al-Makhluqat
- Encyclopedia of the Brethren of Purity
- Tabula Rogeriana
- The Book of Healing
- The Remaining Signs of Past Centuries
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Instruments |
- Alidade
- Analog computer
- Aperture
- Armillary sphere
- Astrolabe
- Astronomical clock
- Celestial globe
- Compass
- Compass rose
- Dioptra
- Equatorial ring
- Equatorium
- Globe
- Graph paper
- Magnifying glass
- Mural instrument
- Navigational astrolabe
- Nebula
- Octant
- Planisphere
- Quadrant
- Sextant
- Shadow square
- Sundial
- Schema for horizontal sundials
- Triquetrum
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Concepts |
- Almucantar
- Apogee
- Astrology
- Astrophysics
- Axial tilt
- Azimuth
- Celestial mechanics
- Celestial spheres
- Circular orbit
- Deferent and epicycle
- Earth's rotation
- Eccentricity
- Ecliptic
- Elliptic orbit
- Equant
- Galaxy
- Geocentrism
- Gravitational energy
- Gravity
- Heliocentrism
- Inertia
- Islamic cosmology
- Moonlight
- Multiverse
- Muwaqqit
- Obliquity
- Parallax
- Precession
- Qibla
- Salah times
- Specific gravity
- Spherical Earth
- Sublunary sphere
- Sunlight
- Supernova
- Temporal finitism
- Trepidation
- Triangulation
- Tusi couple
- Universe
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Institutions |
- Al-Azhar University
- House of Knowledge
- House of Wisdom
- University of al-Qarawiyyin
- Observatories
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Influences |
- Babylonian astronomy
- Egyptian astronomy
- Hellenistic astronomy
- Indian astronomy
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Influenced |
- Byzantine science
- Chinese astronomy
- Medieval European science
- Indian astronomy
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Mathematics in the medieval Islamic world |
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Mathematicians | 9th century | |
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13th century | |
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14th century | |
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Mathematical works |
- The Compendious Book on Calculation by Completion and Balancing
- De Gradibus
- Principles of Hindu Reckoning
- Book of Optics
- The Book of Healing
- Almanac
- Encyclopedia of the Brethren of Purity
- Toledan Tables
- Tabula Rogeriana
- Zij
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Concepts |
- Alhazen's problem
- Islamic geometric patterns
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Centers | |
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Influences |
- Babylonian mathematics
- Greek mathematics
- Indian mathematics
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Influenced |
- Byzantine mathematics
- European mathematics
- Indian mathematics
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Related |
- Hindu–Arabic numeral system
- Arabic numerals (Eastern Arabic numerals, Western Arabic numerals)
- Trigonometric functions
- History of trigonometry
- History of algebra
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Mathematics in Iran |
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Mathematicians | Before 20th Century | |
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Modern |
- Maryam Mirzakhani
- Caucher Birkar
- Sara Zahedi
- Farideh Firoozbakht (Firoozbakht's conjecture)
- S. L. Hakimi (Havel–Hakimi algorithm)
- Siamak Yassemi
- Freydoon Shahidi (Langlands–Shahidi method)
- Hamid Naderi Yeganeh
- Esmail Babolian
- Ramin Takloo-Bighash
- Lotfi A. Zadeh (Fuzzy mathematics, Fuzzy set, Fuzzy logic)
- Ebadollah S. Mahmoodian
- Reza Sarhangi (The Bridges Organization)
- Siavash Shahshahani
- Gholamhossein Mosaheb
- Amin Shokrollahi
- Reza Sadeghi
- Mohammad Mehdi Zahedi
- Mohsen Hashtroodi
- Hossein Zakeri
- Amir Ali Ahmadi
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Prize Recipients | Fields Medal |
- Maryam Mirzakhani (2014)
- Caucher Birkar (2018)
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Satter Prize | |
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Organizations |
- Iranian Mathematical Society
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Institutions |
- Institute for Research in Fundamental Sciences
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Authority control  |
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На других языках
- [en] Kushyar Gilani
[it] Kushyar ibn Labban
Abū l-Ḥasan Kūshyār ibn Labbān ibn Bashahrī Gīlānī (in persiano أبو الحسن كوشيار بن لبان الجيلي, "Abū l-Ḥasan Kūshyār ibn Labbān al-Jīlī"; Gilan, 971 – Baghdad, 1029) è stato un astronomo, matematico e geografo persiano, originario del Gilan, a S del mar Caspio (Iran).
[ru] Кушьяр ибн Лаббан
Абу-л-Хасан Кушьяр ибн Лаббан ибн Башахри ал-Джили (перс. کوشیار گیلانی, Гилян, 971 — Багдад, 1029) — газневидский математик и астроном. Его учеником был ан-Насави.
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