- Nasir al-Din al-Tusi
Persian Muslim scholar
Naṣīr al-Dīn al-Ṭūsī
The Astronomical Observatory of Nasir al-Din al-Tusi
Title Khawaja Nasir Born 18 February 1201 (11 Jamadi al-Ula, 597) Died 26 June 1274(aged 73) (18 Dhu'l-Hijjah 672) Ethnicity Persian Region Iran Maddhab Avicennism Main interests Islamic Theology, Islamic Philosophy, Astronomy, Mathematics, Chemistry, Biology and Medicine, Physics, Science Notable ideas Evolution, Spherical trigonometry, Tusi-couple Works Rawḍa-yi Taslīm, Tajrid al-'Aqaid,
Akhlaq-i-Nasri, Zij-i ilkhani,
Al-Tadhkirah fi'ilm al-hay'ah
Influences Avicenna, Fakhr al-Din al-Razi, Mo'ayyeduddin Urdi Influenced ibn Khaldun, Qutb al-Din al-Shirazi, Ibn al-Shatir, Copernicus
Khawaja Muḥammad ibn Muḥammad ibn Ḥasan Ṭūsī (Persian: محمد بن محمد بن الحسن طوسی) (born 18 February 1201 in Ṭūs, Khorasan – died on 26 June 1274 in al-Kāżimiyyah district of metropolitan Baghdad), better known as Naṣīr al-Dīn al-Ṭūsī (Persian: نصیر الدین طوسی; or simply Tusi in the West), was a Persian polymath and prolific writer: an astronomer, biologist, chemist, mathematician, philosopher, physician, physicist, scientist, theologian and Marja Taqleed. He was of the Ismaili-, and subsequently Twelver Shī‘ah Islamic belief. The Muslim scholar Ibn Khaldun (1332–1406) considered Tusi to be the greatest of the later Persian scholars.
Nasir al-Din Tusi was born in the city of Tus in medieval Khorasan (now in north-eastern Iran) in the year 1201 and began his studies at an early age. In Hamadan and Tus he studied the Qur'an, Hadith, Shi'a jurisprudence, logic, philosophy, mathematics, medicine and astronomy.
He was apparently born into a Shī‘ah family and lost his father at a young age. Fulfilling the wish of his father, the young Muhammad took learning and scholarship very seriously and travelled far and wide to attend the lectures of renowned scholars and acquire the knowledge which guides people to the happiness of the next world. At a young age he moved to Nishapur to study philosophy under Farid al-Din Damad and mathematics under Muhammad Hasib. He met also Farid al-Din al-'Attar, the legendary Sufi master who was later killed by Mongol invaders and attended the lectures of Qutb al-Din al-Misri.
In Mosul he studied mathematics and astronomy with Kamal al-Din Yunus (d. 639/1242). Later on he corresponded with Sadr al-Din al-Qunawi, the son-in-law of Ibn al-'Arabi, and it seems that mysticism, as propagated by Sufi masters of his time, was not appealing to his mind and once the occasion was suitable, he composed his own manual of philosophical Sufism in the form of a small booklet entitled Awsaf al-Ashraf "The Attributes of the Illustrious".
As the armies of Genghis Khan swept his homeland, he fled to join the Ismailis and made his most important contributions in science during this time when he was moving from one stronghold to another. He finally joined Hulagu Khan's ranks, after the invasion of the Alamut castle by the Mongol forces.
- Kitāb al-Shakl al-qattāʴ Book on the complete quadrilateral. A five volume summary of trigonometry.
- Al-Tadhkirah fi'ilm al-hay'ah – A memoir on the science of astronomy. Many commentaries were written about this work called Sharh al-Tadhkirah (A Commentary on al-Tadhkirah) - Commentaries were written by Abd al-Ali ibn Muhammad ibn al-Husayn al-Birjandi and by Nazzam Nishapuri.
- Akhlaq-i-Nasri – A work on ethics.
- al-Risalah al-Asturlabiyah – A Treatise on astrolabe.
- Zij-i ilkhani (Ilkhanic Tables) – A major astronomical treatise, completed in 1272.
- sharh al-isharat (Commentary on Avicenna's Isharat)
- Awsaf al-Ashraf a short mystical-ethical work in Persian
- Tajrid al-Itiqadat (A commentary on Shia doctrines)
During his stay in Nishapur, Tusi established a reputation as an exceptional scholar. "Al-Tusi’s prose writing, which number over 150 works, represent one of the largest collections by a single Islamic author. Writing in both Arabic and Persian, Nasir al-Din Tusi dealt with both religious (“Islamic”) topics and non-religious or secular subjects (“the ancient sciences”). His works include the definitive Arabic versions of the works of Euclid, Archimedes, Ptolemy, Autolycus, and Theodosius of Bithynia.
Tusi convinced Hulegu Khan to construct an observatory for establishing accurate astronomical tables for better astrological predictions. Beginning in 1259, the Rasad Khaneh observatory was constructed in Azarbaijan, west of Maragheh, the capital of the Ilkhanate Empire.
Based on the observations in this for the time being most advanced observatory, Tusi made very accurate tables of planetary movements as depicted in his book Zij-i ilkhani (Ilkhanic Tables). This book contains astronomical tables for calculating the positions of the planets and the names of the stars. His model for the planetary system is believed to be the most advanced of his time, and was used extensively until the development of the heliocentric model in the time of Nicolaus Copernicus. Between Ptolemy and Copernicus, he is considered by many to be one of the most eminent astronomers of his time, and his work and theory in astronomy can also be compared to that of the Chinese scientist Shen Kuo (1031-1095 AD)
For his planetary models, he invented a geometrical technique called a Tusi-couple, which generates linear motion from the sum of two circular motions. He used this technique to replace Ptolemy's problematic equant, and it was later employed in Ibn al-Shatir's geocentric model and Nicolaus Copernicus' heliocentric Copernican model. He also calculated the value for the annual precession of the equinoxes and contributed to the construction and usage of some astronomical instruments including the astrolabe.
Ṭūsī criticized Ptolemy's use of observational evidence to show that the Earth was at rest, noting that such proofs were not decisive. Although it doesn't mean that he was a supporter of mobility of the earth, as he and his 16th-century commentator al-Bīrjandī, maintained that the earth's immobility could be demonstrated, but only by physical principles found in natural philosophy. Tusi's criticisms of Ptolemy were similar to the arguments later used by Copernicus in 1543 to defend the Earth's rotation.
About the real essence of the Milky Way, Ṭūsī in his Tadhkira writes: "The Milky Way, i.e. the galaxy, is made up of a very large number of small, tightly-clustered stars, which, on account of their concentration and smallness, seem to be cloudy patches. because of this, it was likend to milk in color."  Three centuries later the proof of the Milky Way consisting of many stars came in 1610 when Galileo Galilei used a telescope to study the Milky Way and discovered that it is really composed of a huge number of faint stars.
In his Akhlaq-i-Nasri, Al-Tusi put forward a basic theory for the evolution of species. He begins his theory of evolution with the universe once consisting of equal and similar elements. According to Tusi, internal contradictions began appearing, and as a result, some substances began developing faster and differently from other substances. He then explains how the elements evolved into minerals, then plants, then animals, and then humans. Tusi then goes on to explain how hereditary variability was an important factor for biological evolution of living things:"The organisms that can gain the new features faster are more variable. As a result, they gain advantages over other creatures. [...] The bodies are changing as a result of the internal and external interactions.""Look at the world of animals and birds. They have all that is necessary for defense, protection and daily life, including strengths, courage and appropriate tools [organs] [...] Some of these organs are real weapons, [...] For example, horns-spear, teeth and claws-knife and needle, feet and hoofs-cudgel. The thorns and needles of some animals are similar to arrows. [...] Animals that have no other means of defense (as the gazelle and fox) protect themselves with the help of flight and cunning. [...] Some of them, for example, bees, ants and some bird species, have united in communities in order to protect themselves and help each other.""Animals are higher than plants, because they are able to move consciously, go after food, find and eat useful things. [...] There are many differences between the animal and plant species, [...] First of all, the animal kingdom is more complicated. Besides, reason is the most beneficial feature of animals. Owing to reason, they can learn new things and adopt new, non-inherent abilities. For example, the trained horse or hunting falcon is at a higher point of development in the animal world. The first steps of human perfection begin from here."
Tusi then explains how humans evolved from advanced animals:"Such humans [probably anthropoid apes] live in the Western Sudan and other distant corners of the world. They are close to animals by their habits, deeds and behavior. [...] The human has features that distinguish him from other creatures, but he has other features that unite him with the animal world, vegetable kingdom or even with the inanimate bodies. [...] Before [the creation of humans], all differences between organisms were of the natural origin. The next step will be associated with spiritual perfection, will, observation and knowledge. [...] All these facts prove that the human being is placed on the middle step of the evolutionary stairway. According to his inherent nature, the human is related to the lower beings, and only with the help of his will can he reach the higher development level."
Chemistry and Physics"A body of matter cannot disappear completely. It only changes its form, condition, composition, colour and other properties and turns into a different complex or elementary matter."
Logic"What spurred him to this was that in the assertoric syllogistic Aristotle and others sometimes used contradictories of absolute propositions on the assumption that they are absolute; and that was why so many decided that absolutes did contradict absolutes. When Avicenna had shown this to be wrong, he wanted to give a way of construing those examples from Aristotle."
Al-Tusi was the first to write a work on trigonometry independently of astronomy. Al-Tusi, in his Treatise on the Quadrilateral, gave an extensive exposition of spherical trigonometry, distinct from astronomy. It was in the works of Al-Tusi that trigonometry achieved the status of an independent branch of pure mathematics distinct from astronomy, to which it had been linked for so long.
He was the first to list the six distinct cases of a right triangle in spherical trigonometry.
This followed earlier work by Greek mathematicians such as Menelaus of Alexandria, who wrote a book on spherical trigonometry called Sphaerica, and the earlier Muslim mathematicians Abū al-Wafā' al-Būzjānī and Al-Jayyani.
In 1265, Tusi wrote a manuscript regarding the calculation for nth roots of an integer. Moreover, he revealed the coefficients of the expansion of a binomial to any power giving the binomial formula and the Pascal triangle relations between binomial coefficients. He also wrote a famous work on theory of colour, based on mixtures of black and white, and included sections on jewels and perfumes.
Influence and legacy
A 60-km diameter lunar crater located on the southern hemisphere of the moon is named after him as "Nasireddin". A minor planet 10269 Tusi discovered by Soviet astronomer Nikolai Stepanovich Chernykh in 1979 is named after him. The K. N. Toosi University of Technology in Iran and Observatory of Shamakhy in the Republic of Azerbaijan are also named after him.
- Persian science
- Islamic Golden Age
- Islamic science
- Islamic scholars
- List of Muslim scholars
- List of Shi'a Muslims
- List of Iranian scientists
- Shen Kuo
- ^ a) "Tusi, Nasir al-Din al-." Encyclopædia Britannica. 2007. Encyclopædia Britannica Online. 27 December 2007 <http://www.britannica.com/eb/article-9073899>. b)Arthur Goldschmidt, Lawrence Davidson. "A Concise History of the Middle East", Westview Press, 2009. ninth edition, pg 127: "Hulegu, contrite at the damage he had wrought, patronized the great Persian scholar, Nasiruddin Tusi (d. 1274), who saved the lives of many other scientists and artists, accumulated a library of 400000 volumes, and built an astronomical ...";  d) Nanne Pieter George Joosse, Bar Hebraeus, "A Syriac encyclopaedia of Aristotelian philosophy: Barhebraeus (13th c.), Butyrum sapientiae, books of ethics, economy, and politics: a critical edition, with introduction, translation, commentary, and glossaries", Published by Brill, 2004. excerpt: " the famous Persian scholar Naslr al-Dln al-Tusi "; e)Seyyed Hossein Nasr," Title Islamic philosophy from its origin to the present: philosophy in the land of prophecy",Publisher SUNY Press, 2006. pp 167: “In fact it was common among Persian Islamic philosophers to write few quatrains on the side often in the spirit of some of the poems of Khayyam singing about the impermanence of the world and its transience and similar themes. One needs to only recall the names of Ibn Sina, Suhrawardi, Nasir al-Din Tusi and Mulla Sadra, who wrote poems alongs with extensive prose works”
- ^ Rodney Collomb, "The rise and fall of the Arab Empire and the founding of Western pre-eminence", Published by Spellmount, 2006. pg 127: "..Khawaja Nasr ed-Din Tusi, the Persian, Khorasani, former chief scholar and scientist of ";
- ^ M.A. Al-Bakhit, L. Bazin, S.M. Cissoko, Volume 4 of History of humanity : scientific and cultural development Routledge, 2000.  pg 367: "the Persian astronomer and philosopher Nasir al-Din Tusi".
- ^ a)Seyyed Hossein Nasr, Islamic Philosophy from Its Origin to the Present: Philosophy in the Land of Prophecy, SUNY Press, 2006, ISBN 0791467996. page 199.; b) Seyyed H. Badakhchani. Contemplation and Action: The Spiritual Autobiography of a Muslim Scholar: Nasir al-Din Tusi (In Association With the Institute of Ismaili Studies. I. B. Tauris (December 3, 1999). ISBN 1-86064-523-2. page.1: ""Nasir al-Din Abu Ja`far Muhammad b. Muhammad b. Hasan al-Tusi:, the renowned Persian astronomer, philosopher and theologian"
- ^ Ṭūsī, Naṣīr al-Dīn Muḥammad ibn Muḥammad; Badakchani, S. J. (2005), Paradise of Submission: A Medieval Treatise on Ismaili Thought, Ismaili Texts and Translations, 5, London: I.B. Tauris in association with Institute of Ismaili Studies, pp. 2–3, ISBN 1860644368
- ^ James Winston Morris, "An Arab Machiavelli? Rhetoric, Philosophy and Politics in Ibn Khaldun’s Critique of Sufism", Harvard Middle Eastern and Islamic Review 8 (2009), pp 242–291.  excerpt from page 286 (footnote 39): "Ibn Khaldun’s own personal opinion is no doubt summarized in his pointed remark (Q 3: 274) that Tusi was better than any other later Iranian scholar". Original Arabic: Muqaddimat Ibn Khaldūn : dirāsah usūlīyah tārīkhīyah / li-Aḥmad Ṣubḥī Manṣūr-al-Qāhirah : Markaz Ibn Khaldūn : Dār al-Amīn, 1998. ISBN 9771960709. Excerpt from Ibn Khaldun is found in the section: الفصل الثالث و الأربعون: في أن حملة العلم في الإسلام أكثرهم العجم (On how the majority who carried knowledge forward in Islam were Persians) In this section, see the sentence sentence where he mentions Tusi as more knowledgeable than other later Persian ('Ajam) scholars: . و أما غيره من العجم فلم نر لهم من بعد الإمام ابن الخطيب و نصير الدين الطوسي كلاما يعول على نهايته في الإصابة. فاعتير ذلك و تأمله تر عجبا في أحوال الخليقة. و الله يخلق ما بشاء لا شريك له الملك و له الحمد و هو على كل شيء قدير و حسبنا الله و نعم الوكيل و الحمد لله.
- ^ Dabashi, Hamid. "Khwajah Nasir al-Din al-Tusi: The philosopher/vizier and the intellectual climate of his times". Routledge History of World Philosophies. Vol I. History of Islamic Philosophy. Seyyed Hossein Nasr and Oliver Leaman (eds.) London: Routledge. 1996. p. 529
- ^ Siddiqi, Bakhtyar Husain. "Nasir al-Din Tusi". A History of Islamic Philosophy. Vol 1. M. M. Sharif (ed.). Wiesbaden:: Otto Harrossowitz. 1963. p. 565
- ^ a b c H. Daiber, F.J. Ragep, "Al-Tusi" in Encyclopaedia of Islam. Edited by: P. Bearman, Th. Bianquis, C.E. Bosworth, E. van Donzel and W.P. Heinrichs. Brill, 2007. Brill Online. Quote: "Al-Tusi's prose writings, which number over 150 works, represent one of the largest collections by a single Islamic author. Writing in both Arabic and Persian, Nasir al-Din dealt with both religious ("Islamic") topics and non-religious or secular subjects ("the ancient sciences")."
- ^ Ragep, F. Jamil (2001), "Freeing Astronomy from Philosophy: An Aspect of Islamic Influence on Science", Osiris 16, 2nd ser.: 49–64, JSTOR 301979 , at p. 60.
- ^ F. Jamil Ragep (2001), "Tusi and Copernicus: The Earth's Motion in Context", Science in Context 14 (1-2), p. 145–163. Cambridge University Press.
- ^ Ragep, Jamil, Nasir al-Din al-Tusi’s Memoir on Astronomy (al-Tadhkira fi `ilm al-hay’ a) Edition, Translation, Commentary and Introduction. 2 vols. Sources in the History of Mathematics and Physical Sciences. New York: Springer-Verlag, 1993. pp. 129
- ^ O'Connor, J. J.; Robertson, E. F. (November 2002). "Galileo Galilei". University of St Andrews. http://www-gap.dcs.st-and.ac.uk/~history/Biographies/Galileo.html. Retrieved 2007-01-08.
- ^ a b c d e Farid Alakbarov (Summer 2001). A 13th-Century Darwin? Tusi's Views on Evolution, Azerbaijan International 9 (2).
- ^ Tony Street (July 23, 2008). "Arabic and Islamic Philosophy of Language and Logic". Stanford Encyclopedia of Philosophy. http://plato.stanford.edu/entries/arabic-islamic-language. Retrieved 2008-12-05.
- ^ "trigonometry". Encyclopædia Britannica. http://www.britannica.com/EBchecked/topic/605281/trigonometry. Retrieved 2011-04-25.
- ^ * Katz, Victor J. (1993). A History of Mathematics: An Introduction, p259. Addison Wesley. ISBN 0-673-38039-4.
- ^ Bosworth, Clifford E.; Asimov (2003). History of civilizations of Central Asia.. 4. Motilal Banarsidass. p. 190. ISBN 8120815963.
- ^ Hayes, John R.; Badeau, John S. (1983). The genius of Arab civilization : source of Renaissance (2nd ed.). Taylor & Francis. p. 156. ISBN 0262081369.
- ^ a b Berggren, J. Lennart (2007). "Mathematics in Medieval Islam". The Mathematics of Egypt, Mesopotamia, China, India, and Islam: A Sourcebook. Princeton University Press. p. 518. ISBN 9780691114859.
- ^ Also the 'sine law' (of geometry and trigonometry, applicable to sperical trigonometry) is attributed, among others, to Alkhujandi. (The three others are Abul Wafa Bozjani, Nasiruddin Tusi and Abu Nasr Mansur). Razvi, Syed Abbas Hasan (1991) A history of science, technology, and culture in Central Asia, Volume 1 University of Peshawar, Peshawar, Pakistan, page 358, OCLC 26317600
- ^ Bijli suggests that three mathematicians are in contention for the honor, Alkhujandi, Abdul-Wafa and Mansur, leaving out Nasiruddin Tusi. Bijli, Shah Muhammad and Delli, Idarah-i Adabiyāt-i (2004) Early Muslims and their contribution to science: ninth to fourteenth century Idarah-i Adabiyat-i Delli, Delhi, India, page 44, OCLC 66527483
- ^ 2003ASPC..289..157B Page 157
- ^ http://books.google.com/books?q=10269+tusi&hl=lt
- "Ṭūsī, Muḥammad Ibn Muḥammad Ibn al-Ḥasan al-". Dictionary of Scientific Biography. New York: Charles Scribner's Sons. 1970–80. ISBN 0684101149.
- O'Connor, John J.; Robertson, Edmund F., "Nasir al-Din al-Tusi", MacTutor History of Mathematics archive, University of St Andrews, http://www-history.mcs.st-andrews.ac.uk/Biographies/Al-Tusi_Nasir.html .
- Encyclopædia Iranica, "AḴLĀQ-E NĀṢERĪ", G.M. Wickens 
- Encyclopædia Iranica, "AWṢĀF AL-AŠRĀF", G.M. Wickens 
- Encyclopædia Iranica, "Nasir al-Din al-Tusi" George Saliba 
- Nasr, Seyyed Hossein (2008) [1970-80]. "Al-Ṭūsī, Muḥammad Ibn Muḥammad Ibn Al-Ḥasan Usually Known as Naṣir Al-Dīn". Complete Dictionary of Scientific Biography. Encyclopedia.com. http://www.encyclopedia.com/doc/1G2-2830904400.html.
- Biography by Islamic Insights
- Biography by Islamic Philosophy Online
- Biography by The Internet Encyclopedia of Philosophy
- Kerry Magruder, History of Science Online: Islamic and Early Medieval Science, University of Oklahoma
- Islam Online.
- The Rekhaganita. An 18th century Sanskrit translation of Nasir al-Din al-Tusi's recension of Euclid's Elements.
- Richard Covington, Rediscovering Arabic Science, 2007, Saudi Aramco World
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См. также в других словарях:
Nasir Ad-Din At-Tusi — Pour l’article homonyme, voir an Nasir. Nasir ad Din at Tusi Abû Ja far Muhammad ben Muhammad ben al Hasan Nasîr ad Dîn at Tûsî … Wikipédia en Français
Nasir ad-din at-tusi — Pour l’article homonyme, voir an Nasir. Nasir ad Din at Tusi Abû Ja far Muhammad ben Muhammad ben al Hasan Nasîr ad Dîn at Tûsî … Wikipédia en Français
Nasir al-Din al-Tusi — Nasir ad Din at Tusi Pour l’article homonyme, voir an Nasir. Nasir ad Din at Tusi Abû Ja far Muhammad ben Muhammad ben al Hasan Nasîr ad Dîn at Tûsî … Wikipédia en Français
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Nasir ad-Din at-Tusi — Nasir ad Din at Tusi, persischer Universalgelehrter und Staatsmann, * Tus (Khorasan) 18. 2. 1201, ✝ Bagdad 26. 6. 1274; lebte lange unfreiwillig auf der Assassinenfestung Alamut, wo er u. a. maßgebende Bearbeitungen der griechischen Klassiker… … Universal-Lexikon
Nasir ad-Din at-Tusi — Pour l’article homonyme, voir an Nasir. Nasir ad Din at Tusi Abû Ja far Muhammad ben Muhammad ben al Hasan Nasîr ad Dîn at Tûsî … Wikipédia en Français
Nasir Ad-din at-Tusi — Bildnis Nasir ad Din Tusis Nasir ad Din at Tusi (persisch: Nasir Ad din e Tusi, arabisch أبو جعفر محمد بن محمد بن الحسن نصیرالدین طوسی, DMG Abū Ǧaʿfar Muḥammad b. Muḥammad b. al Ḥasan Naṣīr ad Dīn aṭ Ṭūsī; * 1201 in Tūs, Chorassan Iran … Deutsch Wikipedia
Nasir Al-din al-Tusi — Bildnis Nasir ad Din Tusis Nasir ad Din at Tusi (persisch: Nasir Ad din e Tusi, arabisch أبو جعفر محمد بن محمد بن الحسن نصیرالدین طوسی, DMG Abū Ǧaʿfar Muḥammad b. Muḥammad b. al Ḥasan Naṣīr ad Dīn aṭ Ṭūsī; * 1201 in Tūs, Chorassan Iran … Deutsch Wikipedia
Nasir ad-Din at-Tusi — Bildnis Nasir ad Din Tusis Naṣīr ad Dīn aṭ Ṭūsī (persisch نصیر الدین طوسی, DMG Naṣīr ud Dīn e Ṭūsī, arabisch أبو جعفر محمد بن محمد بن الحسن … Deutsch Wikipedia
Abu Jafar Muhammad Ibn Muhammad Ibn al-Hasan Nasir al-Din al-Tusi — Nasir ad Din at Tusi Pour l’article homonyme, voir an Nasir. Nasir ad Din at Tusi Abû Ja far Muhammad ben Muhammad ben al Hasan Nasîr ad Dîn at Tûsî … Wikipédia en Français