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- Abū_Sahl_al-Qūhī abstract "Abū Sahl Wayjan ibn Rustam al-Qūhī (al-Kūhī; Persian: ابوسهل بیژن کوهی Abusahl Bijan-e Koohi) was a Persian mathematician, physicist and astronomer. He was from Kuh (or Quh), an area in Tabaristan, Amol, and flourished in Baghdad in the 10th century. He is considered one of the greatest Muslim geometers, with many mathematical and astronomical writings ascribed to him.He was the leader of the astronomers working in 988 AD at the observatory built by the Buwayhid Sharaf al-Dawla in Badhdad. He wrote a treatise on the astrolabe in which he solves a number of difficult geometric problems.In mathematics he devoted his attention to those Archimedean and Apollonian problems leading to equations higher than the second degree. He solved some of them and discussed the conditions of solvability. For example, he was able to solve the problem of inscribing a regular pentagon into a square, resulting in an equation of fourth degree. He alse wrote a treatise on the "perfect compass", a compass with one leg of variable length that allows to draw any conic section: straight lines, circles, ellipses, parabolas and hyperbolas. It is likely that al-Quhi invented the device.Like Aristotle, al-Quhi proposed that the heaviness of bodies vary with their distance from the center of the Earth.The correspondence between al-Quhi and Abu Ishaq al-Sabi, a high civil servant interested in mathematics, has been preserved.".
- Abū_Sahl_al-Qūhī birthDate "0940".
- Abū_Sahl_al-Qūhī deathDate "1000".
- Abū_Sahl_al-Qūhī thumbnail Gravure_originale_du_compas_parfait_par_Abū_Sahl_al-Qūhī.jpg?width=300.
- Abū_Sahl_al-Qūhī wikiPageID "1766764".
- Abū_Sahl_al-Qūhī wikiPageRevisionID "598619167".
- Abū_Sahl_al-Qūhī dateOfBirth "940".
- Abū_Sahl_al-Qūhī dateOfDeath "1000".
- Abū_Sahl_al-Qūhī id "Al-Quhi".
- Abū_Sahl_al-Qūhī name "Quhi, Abu Sahl".
- Abū_Sahl_al-Qūhī shortDescription "Medieval Persian mathematician-astronomer".
- Abū_Sahl_al-Qūhī title "Abu Sahl Waijan ibn Rustam al-Quhi".
- Abū_Sahl_al-Qūhī description "Medieval Persian mathematician-astronomer".
- Abū_Sahl_al-Qūhī subject Category:1000_deaths.
- Abū_Sahl_al-Qūhī subject Category:10th-century_Iranian_people.
- Abū_Sahl_al-Qūhī subject Category:10th-century_astronomers.
- Abū_Sahl_al-Qūhī subject Category:10th-century_mathematicians.
- Abū_Sahl_al-Qūhī subject Category:940_births.
- Abū_Sahl_al-Qūhī subject Category:Astronomers_of_medieval_Islam.
- Abū_Sahl_al-Qūhī subject Category:Buyid_scholars.
- Abū_Sahl_al-Qūhī subject Category:Iranian_scientists.
- Abū_Sahl_al-Qūhī subject Category:Iraqi_scientists.
- Abū_Sahl_al-Qūhī subject Category:Mathematicians_of_medieval_Islam.
- Abū_Sahl_al-Qūhī subject Category:Medieval_Iraqi_astronomers.
- Abū_Sahl_al-Qūhī subject Category:Medieval_Iraqi_mathematicians.
- Abū_Sahl_al-Qūhī subject Category:Medieval_Persian_astronomers.
- Abū_Sahl_al-Qūhī subject Category:Medieval_Persian_mathematicians.
- Abū_Sahl_al-Qūhī subject Category:People_from_Amol.
- Abū_Sahl_al-Qūhī type Agent.
- Abū_Sahl_al-Qūhī type Person.
- Abū_Sahl_al-Qūhī type Person.
- Abū_Sahl_al-Qūhī type Q215627.
- Abū_Sahl_al-Qūhī type Q5.
- Abū_Sahl_al-Qūhī type Agent.
- Abū_Sahl_al-Qūhī type NaturalPerson.
- Abū_Sahl_al-Qūhī type Thing.
- Abū_Sahl_al-Qūhī type Person.
- Abū_Sahl_al-Qūhī comment "Abū Sahl Wayjan ibn Rustam al-Qūhī (al-Kūhī; Persian: ابوسهل بیژن کوهی Abusahl Bijan-e Koohi) was a Persian mathematician, physicist and astronomer. He was from Kuh (or Quh), an area in Tabaristan, Amol, and flourished in Baghdad in the 10th century. He is considered one of the greatest Muslim geometers, with many mathematical and astronomical writings ascribed to him.He was the leader of the astronomers working in 988 AD at the observatory built by the Buwayhid Sharaf al-Dawla in Badhdad.".
- Abū_Sahl_al-Qūhī label "Abu Sahl al-Quhi".
- Abū_Sahl_al-Qūhī label "Abū Sahl al-Qūhī".
- Abū_Sahl_al-Qūhī label "Abū Sahl al-Qūhī".
- Abū_Sahl_al-Qūhī label "Abū Sahl al-Qūhī".
- Abū_Sahl_al-Qūhī label "Ал-Кухи".
- Abū_Sahl_al-Qūhī label "أبو سهل القوهي".
- Abū_Sahl_al-Qūhī label "アブー・サフル・アル=クーヒー".
- Abū_Sahl_al-Qūhī sameAs Ab%C5%AB_Sahl_al-Q%C5%ABh%C4%AB.
- Abū_Sahl_al-Qūhī sameAs Abu_Sahl_al-Quhi.
- Abū_Sahl_al-Qūhī sameAs Abū_Sahl_al-Qūhī.
- Abū_Sahl_al-Qūhī sameAs アブー・サフル・アル=クーヒー.
- Abū_Sahl_al-Qūhī sameAs Abū_Sahl_al-Qūhī.
- Abū_Sahl_al-Qūhī sameAs Q335313.
- Abū_Sahl_al-Qūhī sameAs Q335313.
- Abū_Sahl_al-Qūhī wasDerivedFrom Abū_Sahl_al-Qūhī?oldid=598619167.
- Abū_Sahl_al-Qūhī depiction Gravure_originale_du_compas_parfait_par_Abū_Sahl_al-Qūhī.jpg.
- Abū_Sahl_al-Qūhī givenName "Abu Sahl".
- Abū_Sahl_al-Qūhī name "Abu Sahl Quhi".
- Abū_Sahl_al-Qūhī surname "Quhi".