Nasehpour 2018, "apparently the idea of a function was proposed by the Persian mathematician Sharaf al-Din al-Tusi (died 1213/4), though his approach was not very explicit, perhaps because of this point that dealing with functions without symbols is very difficult. Anyhow algebra did not decisively move to the dynamic function substage until the German mathematician Gottfried Leibniz(1646–1716)." Nasehpour, Peyman (August 2018). "A Brief History of Algebra with a Focus on the Distributive Law and Semiring Theory". arXiv:1807.11704 [math.HO]. Bibcode:2018arXiv180711704N. S2CID119176936. ResearchGate:326732377.
Hogendijk 1989, p. 71. Hogendijk, Jan P. (1989), "Sharaf al-Dīn al-Ṭūsī on the Number of Positive Roots of Cubic Equations", Historia Mathematica, 16: 69–85, doi:10.1016/0315-0860(89)90099-2
Hogendijk 1989, pp. 71–72. Hogendijk, Jan P. (1989), "Sharaf al-Dīn al-Ṭūsī on the Number of Positive Roots of Cubic Equations", Historia Mathematica, 16: 69–85, doi:10.1016/0315-0860(89)90099-2
Berggren 1990, pp. 307–308. Berggren, J. Lennart (1990). "Innovation and Tradition in Sharaf al-Dīn al-Ṭūsī's Muʿādalāt". Journal of the American Oriental Society. 110 (2): 304–309. doi:10.2307/604533. JSTOR604533.
Berggren 1990. Berggren, J. Lennart (1990). "Innovation and Tradition in Sharaf al-Dīn al-Ṭūsī's Muʿādalāt". Journal of the American Oriental Society. 110 (2): 304–309. doi:10.2307/604533. JSTOR604533.
Hogendijk 1989. Hogendijk, Jan P. (1989), "Sharaf al-Dīn al-Ṭūsī on the Number of Positive Roots of Cubic Equations", Historia Mathematica, 16: 69–85, doi:10.1016/0315-0860(89)90099-2
Katz, Victor; Barton, Bill (October 2007). "Stages in the History of Algebra with Implications for Teaching". Educational Studies in Mathematics. 66 (2): 192. doi:10.1007/s10649-006-9023-7. S2CID120363574.
Nasehpour 2018, "apparently the idea of a function was proposed by the Persian mathematician Sharaf al-Din al-Tusi (died 1213/4), though his approach was not very explicit, perhaps because of this point that dealing with functions without symbols is very difficult. Anyhow algebra did not decisively move to the dynamic function substage until the German mathematician Gottfried Leibniz(1646–1716)." Nasehpour, Peyman (August 2018). "A Brief History of Algebra with a Focus on the Distributive Law and Semiring Theory". arXiv:1807.11704 [math.HO]. Bibcode:2018arXiv180711704N. S2CID119176936. ResearchGate:326732377.
jstor.org
Berggren 1990, pp. 307–308. Berggren, J. Lennart (1990). "Innovation and Tradition in Sharaf al-Dīn al-Ṭūsī's Muʿādalāt". Journal of the American Oriental Society. 110 (2): 304–309. doi:10.2307/604533. JSTOR604533.
Berggren 1990. Berggren, J. Lennart (1990). "Innovation and Tradition in Sharaf al-Dīn al-Ṭūsī's Muʿādalāt". Journal of the American Oriental Society. 110 (2): 304–309. doi:10.2307/604533. JSTOR604533.
Nasehpour 2018, "apparently the idea of a function was proposed by the Persian mathematician Sharaf al-Din al-Tusi (died 1213/4), though his approach was not very explicit, perhaps because of this point that dealing with functions without symbols is very difficult. Anyhow algebra did not decisively move to the dynamic function substage until the German mathematician Gottfried Leibniz(1646–1716)." Nasehpour, Peyman (August 2018). "A Brief History of Algebra with a Focus on the Distributive Law and Semiring Theory". arXiv:1807.11704 [math.HO]. Bibcode:2018arXiv180711704N. S2CID119176936. ResearchGate:326732377.
Nasehpour 2018, "apparently the idea of a function was proposed by the Persian mathematician Sharaf al-Din al-Tusi (died 1213/4), though his approach was not very explicit, perhaps because of this point that dealing with functions without symbols is very difficult. Anyhow algebra did not decisively move to the dynamic function substage until the German mathematician Gottfried Leibniz(1646–1716)." Nasehpour, Peyman (August 2018). "A Brief History of Algebra with a Focus on the Distributive Law and Semiring Theory". arXiv:1807.11704 [math.HO]. Bibcode:2018arXiv180711704N. S2CID119176936. ResearchGate:326732377.
Katz, Victor; Barton, Bill (October 2007). "Stages in the History of Algebra with Implications for Teaching". Educational Studies in Mathematics. 66 (2): 192. doi:10.1007/s10649-006-9023-7. S2CID120363574.
