Ahmad Salim Sa‘idan: A Palestinian Historian of Arabic Mathematics
Since the middle of the 20th century, the history of Arabic mathematics evolved as a subfield of history of science and became an area of a special expertise in which intermingled the skills of confirmed mathematicians with the cultural sense of professional historians. One of the experts who brilliantly emerged in this field was Ahmad Salim Sa‘idan (19141991), a Palestinian born in Safad who settled in Amman for a long period of his life. This article, intended as homage to this son of Palestine, presents a biographical sketch and an extensive bibliography of his works on the history of mathematics and astronomy in Islamic civilization....
Mohammed Abattouy*

Figure 1: Front cover of Handsat Ūqlīdis fī aydin ‘arabiya (Euclid’s geometry in Arabian hands) by Ahmad Salīm Sa‘īdān (Amman, 1991).

Since the Histoire des mathématiques published beginning from 1758 by the French mathematician JeanEtienne Montucla, and which is considered unanimously as the first history of mathematics worthy of the name, Arabic mathematics attracted the attention of historians and progressively, especially since the middle of the 20^{th} century, it evolved as a subfield of history of science and became the area of a special expertise in which intermingled the skills of confirmed mathematicians to the cultural sense of professional historians. The historians engaged in this field came from all over the world. Among them was an Arab and Palestinian who distinguished himself since early 1960s when he began to publish original works that attracted the attention of his colleagues. His articles and soon his books were acclaimed and after few publications in Arabic, his papers appeared (beginning from 1966) in the famous journal of history of science Isis founded by George Sarton. This scholar is Ahmad Salīm Sa’īdān, a Palestinian from Safad who settled in Amman for a long period of his life.

Figure 2: Front cover of AlDuktūr Ahmad Salīm Sa‘īdān: Mukhtārāt min intājihi alfikrī, selected and introduced by Khālid Ahmad Jarrār (Amman, 2002).

1. Biographical sketch [1]
The fate of Sa’īdān as a historian of mathematics came in the context of a real school of history of science which flourished in the Arab world since the 1940s with the publication of historical works by the Egyptian scholars Mustafa Nazif and ‘Ali Mustafa Mushrafa, followed by an ambitious generation of young experts who will have a great career in this field, first at home then abroad, Abdulhamid Ibrahim Sabra and Roshdi Rashed (from Egypt), and Mohammed Souissi and Ahmed Djebbar (from Tunisia and Algeria, respectively), and George Saliba (from Lebanon).
On January 23, 1991, the remarkable historian of medieval Arabic mathematics, Professor Ahmad Salīm Sa’īdān died in Amman, Jordan. Sa’īdān was born in 1914 into an Arabic family in Safad (Palestine). He was a student of the Arabic College in AlQuds (Jerusalem) and at the American University in Beirut, where he took the degree of Bachelor of Science in mathematics in 1934. Beirut had a strong tradition of studies in the history of Arabic mathematics, and young Sa’īdān was attracted to this field.
After having a Bachelor from London University, his investigations on Arabic mathematics later earned him a Ph.D. from Khartoum University in Sudan. As Professor of mathematics, Sa’īdān taught in Arabic colleges and universities in Palestine, Sudan, and Jordan. After his retirement in 1979, he became President of the University of AbuDis in Jerusalem, but he was expelled by the Israeli occupation forces in 1981.

Figure 3: A page from a 13^{th}century Arabic recension (tahrīr) of Euclid’s Elements by Nasīr alDīn alTūsī. © Edinburgh University Library. (Source).

Sa’īdān was a well known historian in the community of historians of Islamic sciences. His works focused on two fields:
 The edition of original texts in the different fields of mathematics practiced in ancient and medieval times (geometry, algebra and arithmetic); in this sense he edited more than 20 texts (see list below in section 4); and
 The analysis of the original texts with the tools of history of science to reconstruct content and retrace intercultural influences. Thus, his work as a historian of mathematics led him to pay a special interest to the influence exerted on the development of Arabic mathematics by the Indian and Greek traditions. But at the same time, he was aware of the fantastic progress represented by methods of demonstration and mathematical discoveries brought about by Arab and Muslim mathematicians. In this sense, he had an overall view on the Arabic mathematical tradition and tended to cover its two main wings in the Islamic East and West, mainly in his reconstruction of the history of Arabic algebra, from its emergence in the work of AlKhwarizmi in Baghdad in early 9^{th} century, until its later stage in the works of the mathematicians of the Maghrib, Ibn alBanna alMurrakushi (d. 1321) and alQalasadi (d. 1406).

Figure 4: A page from Kitāb aljabr wa lmuqābala, the first extant algebra text, written in about 825 by Muhammad ibn Mūsā alKhwārizmī. (Source).

During a career that lasted for several decades, Ahmad Salīm Sa’īdān attended congresses and scientific meetingsy the first prize awarded by the Kuwait Foundation for the Advancement of Science. Besides his work as historian of science, he was also interested in the actual state of science in the Arab world and translated several scientific textbooks. Likewise, he participated to the reflexion on the Arabization of science and on the improvement of teaching science in the Arab universities. In this regard, he was sensitive to the status of Arabic as a scientific language and manifested the desire to see it resuming again its status of vehicle of scientific creation as it was in the past.
Sa’īdān’s first wellknown paper, “The Rasa’il of Biruni and Ibn Sinan: A rearrangement,” appeared in Islamic Culture in 1960. In this paper, he investigated the famous Bankipur manuscript containing many treatises of alBiruni (9731048) and his predecessors and contemporaries. In this manuscript, there had been confusion about the pagination of certain treatises by these scientists. In his investigation, Sa’īdān not only straightened this out but also discovered an earlier unknown treatise of Ibrahim Ibn Sinan (908946) titled alMasa’il almukhtara (Selected Problems).

Figure 5: Page from a manuscript of the Algebra (Maqālah fi aljabr waal muqābalah) of ‘Umar AlKhayyām (10481131). Manuscript on paper, 56 leaves, 13^{th} century. Columbia University Libraries, RBML, Smith Oriental MS 45. (Source).

Five years later in the same journal, Sa’īdān published “The development of HinduArabic arithmetic”, a study devoted to the history of Arabic arithmetic with Arabic numerals (called by the Arabs “Indian”). In this paper, he published an English translation of part of an arithmetical treatise he discovered by the 10^{th}century Syrian mathematician Ahmad alUqlidisi dealing with decimal fractions. Thus, Sa’īdān had found the first example in the history of mathematics of the application of decimal fractions, many centuries before Emmanuel Bonfils, Jamshid alKashi, and Simon Stevin.


Figure 6: Page from AlKitāb alFakhrī [the Fakhri book] of the mathematician AlKarajī (d. 1029) in which he presented geometric demonstrations of an equation. (Source).

Figure 7: Front cover of Muqaddima litārīkh alfikr al‘ilmī fī alislām (Introduction to the history of scientific thought in Islam) by Ahmad Salīm Sa‘īdān (Kuwait, 1988, ‘Ālam alma‘rifa, No. 131).

In 1966, Sa’īdān published a paper in Isis on Kitab alFusul fi alHisab alHindi (Book of sections on Hindu arithmetic) of Abu Ahmad ibn Ibrahim alUqlidisi, which is the earliest extant Arabic arithmetic. This paper gave an analysis of the arithmetical treatise by alUqlidisi. Later on, he published a complete English translation in 1978.
During the 1970s, and in parallel with the publication of the volumes of the Dictionary of Scientific Biography in New York, Sa’īdān wrote a series of articles on the medieval Arabic mathematicians Kushyar ibn Labban alJili, alNasawi, alQalasadi, Ya’ish alUmawi, alUqlidisi, and alBaghdadi. Those entries were either the result of earlier works he already published or the first interest he had for certain names of scholars on who he was going to work in the coming years. This was the case for AlUmawi, the mathematician of 15^{th}century Syria from Andalusian origin, of whom Sa’īdān published the treatise of arithmetic in Aleppo in 1981.
In 1974, Sa’īdān published an article in Isis, “The arithmetic of Abu ‘lWafa”, devoted to the arithmetical treatise of the famous Baghdad mathematician and astronomer alBuzgani (940998). The complete Arabic text of this treatise, based on manuscripts held at Leiden University and the Cairo National Library, was edited by Sa’īdān in Amman in 1971 together with an introduction, commentary, and ample references to the Arithmetic of alKaraji (d. ca. 1030). The treatise of alBuzgani is a very famous arithmetical text containing the only known instance of negative numbers.

Figure 8: Page from a Latin version of Euclid’s Elements, Liber elementorum in artem geometria (Venice, 1482). This Latin version is thought to have been translated from Arabic by the English scholar Adelard of Bath (12^{th} century), with a commentary by Campanus of Novara. (Source).

At a conference devoted to the millennium of alBiruni held in Karachi, Pakistan in 1973, Sa’īdān lectured on “The trigonometry of alBiruni”. Three years later, at the International Symposium for the History of Arabic Science in Aleppo, his lecture was on “Number theory and series summation in two Arabic texts”. In 1977, he published the Cartography of alBiruni and the Treatise on Amicable Numbers by Thabit ibn Qurra (836901). The year after, he published “Theory of numerical triangles of alKhazin,” a study on the theory of Pythagorean triples in the treatises of Abu Ja’far alKhazin (d. ca. 965; not to be confused with AlKhazini, d. ca. 1120).
Sa’īdān also edited the complete mathematical treatises of Ibrahim Ibn Sinan, the genius mathematician of the 10^{th} century who was the grandson of Thabit ibn Qurra, together with an introduction and commentary. These treatises played an important role in the history of geometry since Ibn Sinan’s treatise On the mensuration of a parabola is the first in the history of mathematics to use a general affine transformation of plane figures (polygons and segments of parabolas), and his treatise on the construction of conic sections is the first to employ a plane projective transformation mapping a circle onto a hyperbola.


Figure 9: Nasīr alDīn alTūsī’s (d. 1274 CE) record of Euclid’s proof of the Pythagorean Theorem. (Source).

Figure 10: Extract from an Arabic mathematical text on the concept of the decimal fractions, which is attributed to Stevin (around 1600), whilst the existence of such fractions in Arabic mathematical works is attested as early as the 10^{th} century. (Source). See: Seeking Science from the Lands of Islam by George Saliba.

In his obituary of Sa’īdān, Boris R. Rosenfeld, a notable historian of Arabic sciences, wrote as a conclusion: “My correspondence with Sa’īdān began when he was living in Khartoum and I was in Moscow. We often exchanged copies of Arabic manuscripts, printed texts, and our own publications. The death of Sa’īdān is an enormous loss for historians of mathematics around the world” [2].
2. Publications of A. S. Sa’īdān on Arabic mathematics and astronomy
Many of the late Professor Sa’īdān’s books and articles contain editions of medieval Arabic texts on arithmetic, algebra, geometry and astronomy. A large number of these editions seem to be virtually unknown outside of the Arabic world, although his works were privileged sources of work for his colleagues, the professional historians of Islamic science.
2.1. Critical editions
 1968: Nasir alDin alTusi, Jawami’ alhisab bi‘ltakht wa‘lturab. Beirut: The American University, 1968, 292 pp.
 1971: Ta’rikh ‘iim alhisab alarabi. Aljuz’ alawwal: hisab alyad [History of Arabic arithmetic. Part 1. Finger reckoning. Amman: Jam’iyat ‘ummal almatabi’ alta’awuniyya (in Arabic). [Includes Abu ‘lWafa alBuzgani, Kitab fima yahtaj ilayhi al‘ummal wa‘lkutab min ‘ilm alhisab (On the science of arithmetic necessary for scribes, workers and others)].
 1971: “‘Ilm alHisab ‘inda I‘Arab” [The science of arithmetic among the Arabs]. ‘Alam alfikr (Kuwayt) vol. 2, pp. 161194 (in Arabic).
 1973: Ta’rikh ‘iim alhisrib ai‘arabi. ‘Aljuz’ althani. AIfusul fi ihisdb alHindi liAbi ‘IHasan Ahmad ibn Ibrrahim alUqlidisi [History of Arabic arithmetic. Part 2. The chapters on Indian Arithmetic by alUqlidisi]. Amman: University of Jordan Press (in Arabic).
 1977: Kitab ala’dad almutahdbba iiThabit ibn Qurra. Amman: The Jordanian University [In Arabic]
 1977: “Kitab tastih alsuwar watabtikh alkuwar liAbi ‘lRayhan alBiruni almutawaffa sanat 440H”, Dirasat (Amman: The Jordanian University) vol. 4, N° 12 (in Arabic).
 1978: Abū alHasan Ahmad b. Ibrāhīm alUqlīdīsī, The Arithmetic of alUqlīdisī: The story of HinduArabic Arithmetic as Told in Kitab alfusul fi alhisab alHindi written by Abu alHasan Ahmad ibn Ibrahim alUqlidisi written in Damascus in the year 341 (A.D. 952/3). Translated and annotated by A. S. Sa’īdān. Dordrecht/Boston: D. Reidel (xvii+492 pp. ; 25 cm).
 1978: “Hawla khawas ala’dad liAbi Ja’far Muhammad ibn alHusayn”. Dirasat (Amman: The Jordanian University) vol. 5, N°. 2, pp. 749 (in Arabic).
 1981: Marasim alintisab fi ma’alim alhisab li Ya’ish b. Ibrahim alAmawi. Aleppo: Institute for the History of Arabic Science (series “masadir wadirasat fi tarikh al‘ulum al‘arabiya wa‘lislamiya, silsilat al ulum al riyadhiya”, 2), 128 pp., 24 cm.
 1982: “Risalatan fi ‘lhandasa tunsaban ila Arshimidis” [two treatises in geometry attributed to Archimedes]. Majallat ma’had almakhtutat al‘arabiyya vol. 26, pp. 571623 (in Arabic).
 1983: Rasa’il Ibn Sinan [The Treatises of [Ibrahim] Ibn Sinan]. Edition of the Arabic unicum MS kept at Bankipur library (published previously in Haydarabad in 1948). Kuwait: Kuwait: The National Council for Culture, Arts and Letters; Arabic Heritage Department (series “alsilsila alturathiya”, 6), 375 pp., 25 cm (in Arabic, with English summaries).
 1984: Ta’rikh ‘ilm alhisab ‘inda I‘arab. AlJuz’ althalith: alhisab fi ‘lAndalus wa‘lMaghrib [History of arithmetic among the Arabs. Part 3. Arithmetic in Andalus and the Maghrib]. Amman: Dar alFurqan (series “tarikh al‘ulum ‘inda al‘arab”, 3), 252 pp., 25 cm (in Arabic, with English summary).
 1985: Altakmila fi alhisab li‘Abd alQahir ibn Tahir alBaghdadi ma’a risala lahu fi ‘lmisaha. Tahqiq wadirasa muqarana. Kuwait: Institute of Arabic Manuscripts, 7+389 pp., 25 cm (in Arabic, with English summaries).
 1985: Alfusul fi ‘lhisab alhindi liAbi alHasan Ahmad alUqlidisi. Amman: Allajna alurduniya lita’rib wa‘ltarjama wannashr, 1973, 536 pp., 26 cm (2^{nd} edition 1984 (Aleppo: Institute for the History of Arabic Science, photographic reprint with a few changes; in Arabic).
 1986: Ta’rikh ‘ilm aljabrfi I‘slim al‘arabi. Dirasa muqdrana ma’a tahqiq liahamm kutub aljabr al‘arabiyya [History of Algebra in medieval Islam. A comparative study, with the edition of the most important books of Arabic algebra]. 2 vols. in Arabic, paginated serially. Vol. 1 English title: Algebra in Eastern Islam. Study built upon AlFakhri of AlKaraji. Vol. 2 English title: Algebra in Western Islam. A study of Ibn Badr and Ibn alBanna. Kuwait: alMajlis alwatani li Ithaqafa wa‘Ifunun wa‘Iadab (series “alsilsila alturathiyya”, 15), 1986, 2 vols., 626 pp., 24 cm.
 1991: Handasat Uqilidis fi aydin arbiya: Kitab al‘usul liUqlidis ma’a idhafat alNayrzi ma’a Kitab tajrid Uqlidis li‘Ali b. Ahmad anNasawi [Geometry of Euclid in Arabian hands]. Amman: Dar alBashir, 1991, 598 pp., 24 cm.
2.2. Commentaries and analysis of scientific texts
 1960: “Hawla rasa’il alBiruni” [On the treatises of AlBiruni]. Majallat ma’had almakhttutat al‘Arabiyya (Review of the Institute of Arabic Manuscripts) vol. 6, pp. 307312.
 1960: “The Rasa’il of Biruni and Ibn Sinan: A rearrangement”. Islamic Culture vol. 34, pp. 173175.
 1961: “AIUsul alighriqiyya li‘l‘ulum alriyadiyya ‘inda ‘I‘arab” [The Greek roots of the mathematical sciences among the Arabs]. Majallat ma’had almakhttutat al‘Arabiyya vol. 7, pp. 81110 (Survey article; in Arabic].
 1962: “AlAthar alhindi fi ‘Iriyadiyyat al‘arabiyya [The Indian influence in Arabic mathematics]. AlAbhath vol 15, pp. 409477 (Detailed survey; in Arabic).
 1963: “Tara’if alhisab liAbi Kamil Shuja’ ibn Aslam alMisri”, Majallat ma’had almakhttutat al‘Arabiyya vol. 9, pp. 291320 (in Arabic).
 1965: “The development of HinduArabic arithmetic”. Islamic Culture vol. 39, pp. 209221.
 1966: The Development of HinduArabic Arithmetic. Ph.D. Thesis, Khartoum University.
 1966: “The Earliest Extant Arabic Arithmetic: Kitāb alFusūl fī al Hisāb al Hindī of Abū alHasan, Ahmad ibn Ibrāhīm alUqlīdisī.” Isis vol. 57, pp. 475490.
 1967: “Risalatan fi lhisab al‘arabi” [Two treatises on Arabic arithmetic]. Majallat ma’had almakhttutat al‘Arabiyya 13, 41158. [In Arabic].
 1967: “Jawami’ alhisab bi ‘Itakht wa Iturab”. AlAbhath (Beirut) vol. 20, pp. 91163, 213292 (in Arabic).
 1968: “Finger reckoning in an Arabic poem”. The Mathematics Teacher vol. 61, pp. 707708.
 1974: “The Arithmetic of Abū ‘lWafā [alBuzgānī].” Isis vol. 65, pp. 367375.
 1978: “Number Theory and Series Summations In Two Arabic Texts.” In: Proceedings of the First International Symposium for the History of Arabic Science, April 512, 1976. Volume II: Papers in European Languages, edited by Ahmad Y. alHassan et. al. Aleppo: Institute for the History of Arabic Science, Aleppo University, pp 145163.
 1979: “The Trigonometry of AlBīrūnī”. In: AlBīrūnī Commemorative Volume: Proceedings of the International Congress held in Pakistan on the occasion of Millenary of Abū Rayhān Muhammad ibn Ahmad alBīrūnī (973 – ca 1051 A.D.) (November 26, 1973 thru’ December 12, 1973), edited by Hakim Mohammed Said. Karachi: Hamdard Academy/The Times Press, pp 681690.
 1979: “The Arithmetic of alUqlidisi”. Isis vol. 70, pp. 615617.
 [19701980]. Dictionary of Scientific Biography, edited by Charles G. Gillipsie, (New York: Scribners, 15 vols + supplement): entries “Kushyar (vol. 7, pp. 531533); alNasawi (vol. 9, pp. 614615), alQalasadi (vol. 9, pp. 229230), alUmawi (vol. 13, pp. 539540), alUqlidisi (vol. 13, pp. 544546), alBaghdgdi (vol. 15, pp. 910).
 1980: “Magic Squares in an Arabic Manuscript.” Journal for the History of Arabic Science vol. 4, pp. 8789.
 1983: Qisat alarqam wa‘ltarqim [The story of numbers and numeration]. Amman: Dar alFurqan, 92 pp., 17 cm (in Arabic).
 1984: “Tathlith alzawiya fi ‘Iusur alIslamiyya [Angle trisection in the Islamic period]. Majallat ma’had almakhttitcit al‘Arabiyya vol. 28, pp. 99137 (in Arabic).
 1987: “The Takmila fī ‘lhisāb of alBaghdādī.” In: From Deferent to Equant: A Volume of Studies in the History of Science in the Ancient and Medieval Near East in Honor of E. S. Kennedy, edited by David A. King and George Saliba. New York: Annals of the New York Academy of Sciences, Vol. 500. New York: New York Academy of Sciences, 1987, pp. 437444.
 1988: Muqaddima lita’rikh alfikr al‘ilmifi IIslam [Introduction to the history of scientific thought in Islam]. Kuwait: National Council, for Culture, Arts and Literature, series ‘Alam alma’rifa, N° 131 (in Arabic).
 1991: “AlRiyadhiyat bayna almashriq wa ‘lmaghrib alislamiyyayn [Mathematics between the Islamic East and West] (in Arabic with French summary). In: Deuxième colloque Maghrbin sur l’histoire des mathématiques arabes, Tunis, 1988. Tunis: Université de Tunis I, pp. 723 (in Arabic).
 1991: Muta’ altafkir [The enjoyment of thinking]. Amman: Dar alTanwir (in Arabic). Subtitle of the book: “Problems, puzzles and arithmetical games for young and old persons”. Book of riddles and problems taken from Arabic mathematics.
 “The Algebra and Arithmetic of alKhwārizmī, Muhammad ibn Mūsā.”. In: Proceedings of the International Symposium on Ibn Turk, Khwārezmī, Fārābī, Beyrūnī and Ibn Sīnā: (Ankara, 912 September 1985), edited by Aydin Sayili. Ankara: Atatürk Cultural Center, 1990, pp 273279.
 19961997: “Numeration and Arithmetic”. In: Encyclopedia of the History of Arabic science, edited by Roshdi Rashed. London: Routledge, vol. 2, pp 331348. French translation: “Numération et arithmétique”, Histoire des sciences arabes (Paris: Seuil, 1997, vol. 2: pp. 1130. Arabic translation: “Ala’dad wa‘ilm alhisab”, Mawsu’at tarikh al‘ulum al‘arabiya, Beirut, 1997, vol. 2, pp. 443462.
 2000: “AlBiruni on trigonometry.” In: Science in Islamic Civilisation: Proceedings of the International Symposia: “Science Institutions in Islamic Civilisation”, & “Science and Technology in the Turkish and Islamic World”, edited by Ekmeleddin Ihsanoglu and Feza Günergun. Besiktas, Istanbul: Research Centre for Islamic History and Culture, 2000, pp 167178.
3. The original Arabic texts of mathematics and astronomy published by A. S. Sa’idān [3]
 Euclid (300 BCE): Arabic translation of the Elements (Kitab alUsul), attributed to alHajjaj ibn Matar, MS Leiden, 399/l.
 PseudoArchimedes [texts attributed to Archimedes in Arabic learning]: 1. On tangent circles; 2. Principles of geometry.
 Abu Kamil (9^{th} century): Curiosities of arithmetic.
 Thabit ibn Qurra (836901): 1. On amicable numbers; 2. Letter to Ibn Wahb on how to proceed in the derivation of the construction of geometrical problems [1983]; 3. Trisection of the rectilinear angle.
 Ibrahim ibn Sinan (909946): 1. On the notions he derived [i.e., the works he composed] in geometry and astronomy; 2. On drawing the three conic sections; 3. On the measurement of the sufficient conic section [i.e., the parabola]; 4. On the method of analysis and synthesis and the other geometrical operations; 5. The selected problems; 6. On the motions of the sun; 7. On the astrolabe.
 Yuhanna ibn Yusuf alQass (early 10^{th} century): Treatise on rational and irrational magnitudes.
 Abu Ja’far Muhammad ibn alHusayn alKhazin (early 10^{th} century.): 1. Letter to ‘Abdullah alHasib on he proof of the fact that the sides of two squares, of which the sum is a square, cannot both be odd; 2. Derivation of two mean proportionals between two lines by means of fixed geometry.
 AlUqlidisi (10^{th} century): Chapters on Hindu arithmetic.
 Abu ‘IWafa (10^{th} century): On the science of arithmetic necessary for scribes, workers and others.
 AlSijzi (10^{th} century): 1. On facilitating the methods for the derivation of geometrical propositions (fi tashil alsubul listikhraj alashkal alhandasiyya); 2. Derivation of the two mean proportionals and trisection of the angle by the method of geometry; 3. an untitled treatise on the hyperbola and its asymptotes.
 AlKuhi (10^{th} century): Trisection of the angle.
 Kushyar ibn Labban (10^{th} century): Principles of Hindu reckoning.
 AlNasawi (ca. 1000): Abstract (tajrid) of the elements of geometry.
 AlKaraji (ca. 1000): 1. The suficient (kafi) in arithmetic; 2. AlFakhri book in algebra; 3. Reasons of the calculation of algebra ( ‘ilal hisab aljabr wa‘Imuqabala).
 Abd alQahir alBaghdadi (died 1037): 1. Perfection in arithmetic; 2. On measurement.
 AlBiruni (9721048): On the projection of constellations and making spheres plane (tastih alkuwar watabtih alsuwar).
 R. AlQummi (10^{th}11^{th} centuries): On the possibility of finding the two lines which always approach and do not meet (the hyperbola and its asymptotes).
 AlShahrazuri (11^{th}12^{th} centuries): Commentary on alKaraji’s The suficient in arithmetic.
 Nasir alDin alTusi (12011274): Comprehensive treatises on arithmetic with board and dust.
 Ibn alBanna alMurrakushi (12561321): 1. Treatises on arithmetic; 2. Algebra.
 Ibn Badr (ca. 1311): Summary of algebra (Ikhtisar aljabr wa‘Imuqabala).
 Ya’ish ibn Ibrahim alUmawi (15^{th} century): Rules in the science of arithmetic (Marasim alIntisab fi ma’alim alhisab).
 AlIrbili (date unknown): The sufficient (AlKafi).
 ‘Ali ibn alMaghribi (date unknown): Poem on finger reckoning.
 Anonymous (9^{th}10^{th} centuries): Treatise on the fact that every continuous [quantity] can be divided into things that can be divided indefinitely (edited from MS Paris 2457/42).
4. A. S. Sa’īdān on Arabic as scientific language
 1987 [1997]: Qamus almustalahat alriyadhiya alibtida’iya: muhawala tarikhiya [Lexicon of the primary mathematical terms: historical essay]. Amman: The Arabic Academy of Jordan, 1987; reprinted 1997; 63 pp., 24 cm.
 “Allugha al‘arabiya wa‘lmanhajiya al‘ilmiya almu’asira” [The Arabic language and contemporary scientific method], Majallat Majma’ allugha al‘arabiya, vol. 65, pp. 132140.
5. Resources on the work of A. S. Sa’īdān
 Ahmad Djebbar, “Hommage à deux historiens des sciences, Sa’īdān et alManūnī.” Actes du 7e Colloque maghrébin sur l’histoire des mathématiques arabes (Marrakech, 30 mai2 juin 2002). Edited by Abdallah ElIdrissi and Ezzaim Laabid. 2 vols. Marrakech: École Normale Supérieure/alWataniya, pp. 1522, 2005.
 Jan P. Hogendijk, “Bibliography of publications of Ahmad Salīm Sa’īdān (19141991) on the history of mathematics and astronomy in Islamic civilization, and list of medieval Arabic texts published by him”. Historia Mathematica vol. 19 (1992), pp. 439443.
 Jarrār, Khālid Ahmad, AlDuktur Ahmad Salīm Sa’īdān: Mukhtārāt min intājihi alfikrī. Amman: Dar Majdalaoui, 14222002, 511 pp., 24 cm.
 Rosenfeld, Boris R., “In Memoriam: Abmad Salim Sa’īdān (19141991)” Historia Mathematica vol. 19 (1992), pp. 438439.
6. Further reading on the history of Arabic mathematics
 Abattouy, Mohammed, L’Histoire des sciences arabes classiques: une bibliographie sélective commentée. Casablanca: Publications de la Fondation du Roi Abdulaziz pour les Sciences Humaines et les Etudes Islamiques, 2007. Section “Mathematics”, pp. 6185.
 AlHassani, Salim, Chief Editor, 1001 Inventions: Muslim Heritage in Our World. Coeditors: Elisabeth Woodcock and Rabah Saoud. Forward by Sir Roland Jackson. Manchester: FSTC, 2006, pp. 6471.
 Ayyubi N. Akmal Contribution of AlKhwarizmi to Mathematics and Geography.
 Burnett Charles, Leonard of Pisa (Fibonacci) and Arabic Arithmetic.
 Carmody, Francis J., Arabic Astronomical and Astrological Sciences in Latin Translation: A Critical Bibliography. Berkeley: University of California Press, 1956.
 Dauben, Joseph W., The History of Mathematics from Antiquity to the Present: A Selective Bibliography. New York: Garland Press, 1985 (xxxix + 467 pp.)
 Djebbar, Ahmed, Mathematics in the Medieval Maghrib: General Survey on Mathematical Activities in North Africa.
 FSTC, AlKaraji (d. 910 to 929).
 FSTC, Sine, Cosine and the Measurement of the Earth.
 FSTC, Mathematics in Muslim Heritage.
 FSTC, Numbers, Numbers..
 FSTC, Decimal Arithmetic.
 FSTC, Muslim Founders of Mathematics.
 FSTC, A Discovery in Architecture: 15th Century Islamic Architecture Presages 20th Century Mathematics.
 FSTC, AlKhawarizmi (780 – 850 CE).
 FSTC, AlBiruni.
 FSTC, Abu Kamil AlHâsib AlMisrî (850 – 930).
 FSTC, Ahmed ibn Yusuf ibn Ibrahim ibn AlDaya AlMisrî (d. 912).
 FSTC, Jamshid AlKashi (13801436).
 Ghani, Mahbub, The Science of Restoring and Balancing – The Science of Algebra.
 Ghani, Mahbub, Hail the Queen of Mathematics!
 Gerdes, Paulus, and Ahmed Djebbar. Mathematics in African History and Cultures: An Annotated Bibliography. Cape Town: African Mathematical Union, 2007, 2nd ed. (429 pp.)
 Hogendijk, Jan P. Editions and translations of medieval Arabic texts by J.P.Hogendijk.
 Hogendijk, Jan P. (January 1999). Bibliography of Mathematics in Medieval Islamic Civilization; PDF version: click here.
 King, David A., Mathematical Astronomy in Medieval Yemen: A Biobibliographical Survey. Malibu, CA: Undena Publications, 1983 (ix+98 pp.; 28 cm.)
 King, David A., Catalogue of Medieval Astronomical Instruments until ca. 1500.
 King, David A., Bibliography on Islamic astronomy in the ninth and tenth centuries AD.
 Kunitzsch, Paul, AlHassâr’s Kitâb alBayân and the Transmission of the HinduArabic Numerals.
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*Professor of History and Philosophy of Science, Mohammed Vth University, Rabat. Senior Research Fellow, Foundation for Science, Technology and Civilisation (FSTC), Manchester, UK. Chief Editor: https://www.MuslimHeritage.com.
End Notes
[1] The factual information presented in this short biography is based on scattered passages of Sa?īdān’s publications and on Boris A. Rosenfeld, “In Memoriam: Ahmad Salim Sa’idan”, Historia Mathematica vol. 19 (1992), pp. 438439.
[2] Boris A. Rosenfeld, “In Memoriam: Ahmad Salim Sa’idan”, op. cit., p. 439.
[3] This list (ordered chronologically according to author) if part of “Bibliography of Publications of Ahmad Salim Sa’fdan (19141991) on the History of Mathematics and Astronomy In Islamic Civilization and List of Medieval Arabic Texts Published by Him, Compiled by Jan P. Hogendijk”, Historia Mathematica vol. 19 (1992), pp. 439443; at pp. 442443.