Considered an iconic symbol of indigenous legal heritage, Islamic law is adopted nowadays in whole or in part in the legal systems of the Muslim world and is also of significance in Muslim-minority European countries, where it typically finds its niche in civil and financial domains. This article sets out to investigate the norms of translating Islamic family law discourse using a mixed methods approach based on ‘qualitising’ quantitative data, i.e., an approach in which quantitative data are interpreted qualitatively. Drawing (...) on a self-built monolingual English corpus of over three million words covering diverse genres, the analysis will harness the power of corpus processing to enable the study of ten iconic lexical profiles (individual concepts/conceptual systems and their corresponding Arabic and English terms) that are specific to Islamic family law. Profile-based correspondence is also employed to investigate the probability of lexical variation in expressing a conceptual category—a profile refers to a set of synonymous variants or linguistic labels that can be used to designate the same concept. The corpus analysis seeks to identify the key loanwords that represent cultural icons featured in the English-language discourse of Islamic family law and to explore the different mechanisms used to render shariʿa-based concepts. The aim is to investigate concomitant translation norms based on linguistic frequency in the corpus and to interpret ideological implications with reference to the theory of translation norms, which postulates that translation decision making is subject to norms dictated by extralinguistic factors (e.g., socio-political or ideological). The study finds that Islamic family law relies significantly on Arabic loanwords (constructing an ‘Islamgish’ discourse) to maintain shariʿa-based linguistic heritage, which can be seen as a kind of ‘working for one’s own good’. Thus, what is at play here is the ethics of self-interest, which is very typical of postcolonial agendas. (shrink)

In his encyclopedic book, the mathematician of Saragossa, Ibn Hūd, established by an intrinsic demonstration of spherical geometry, a remarkable theorem which generalizes the proposition III.11 from Theodosius’s Spherics and integrates the propositions III.23-25 from Menelaus’s Spherics. In this paper, we study this theorem and the demonstration of Ibn Hūd. The reader will find also some established and translated texts addressing the same theme. Résumé Dans son livre encyclopédique, le mathématicien de Saragosse, Ibn Hūd, établit par une démonstration intrinsèque de (...) la géométrie sphérique un théorème remarquable qui généralise la proposition III.11 des Sphériques de Théodose et intègre les propositions III.23-25 des Sphériques de Ménélaüs. Dans cet article, on étudie ce théorème ainsi que la démonstration d’Ibn Hūd. Le lecteur trouvera aussi établis et traduits quelques textes qui portent sur le même thème. (shrink)

Abū al-Jūd Muḥammad ibn al-Layth is one of the mathematicians of the 10th century who contributed most to the novel chapter on the geometric construction of the problems of solids and super-solids, and also to another chapter on solving cubic and bi-quadratic equations with the aid of conics. His works, which were significant in terms of the results they contained, are moreover important with regard to the new relations they established between algebra and geometry. Good fortune transmitted to us his (...) correspondences with the mathematician and astronomer al-Bīrūnī. The questions they debated, and the answers they yielded, all offer us multiple in vivo perspectives on the research that was undertaken in that period. The reader would find in this article a critical edition and French translation of this correspondence, with historical and mathematical commentaries. Résumé Abū al-Jūd Muḥammad ibn al-Layth est l’un des mathématiciens du x e siècle qui ont le plus contribué au nouveau chapitre sur les constructions géométriques des problèmes solides et sur-solides, ainsi qu’à un autre chapitre, sur la solution des équations cubiques et biquadratiques à l’aide des coniques. Ses travaux, importants pour les résultats qu’ils renferment, le sont aussi par les nouveaux rapports qu’ils instaurent entre l’algèbre et la géométrie. La bonne fortune nous a transmis sa correspondance avec le mathématicien et astronome al-Bīrūnī. Les questions qui y sont débattues, les réponses apportées, nous offrent, in vivo, plusieurs perspectives sur la recherche qui était alors menée. Le lecteur trouve dans cet article l’édition critique de cette correspondance, sa traduction française ainsi qu’un commentaire historique et mathématique. (shrink)

In a manuscript which is being studied here for the first time, al-Samaw'al quotes a paragraph from al-Bīrūnī which shows that the latter knew not only of Brahmagupta's method of quadratic interpolation, but also of another Indian method. Al-Samaw'al examines these methods, as well as linear interpolation, compares them, and evaluates their respective results. He also tries to improve them. In this article the author shows that al-Bīrūnī had used four methods of interpolation, two of which were of Indian origin; (...) and that al-Samaw'al explicitly introduced a new way of evaluating these different methods. He also throws light on the active movement of research on numerical methods that constitutes the background to al-Bīrūmī's and al-Samaw'al's work, and uses modern means to evaluate the different methods and to justify the mathematicians' choices. The author has edited and translated al-Samaw'al's text in order to make it available to historians of Arabic and Indian mathematics. This allows them to follow the history and the mathematical arguments, and deepens our understanding of the importance to the development of mathematics of certain astronomical work. It also highlights the contribution of Indian mathematicians to the development of Arabic mathematics. Dans un texte manuscrit jamais examiné auparavant, al-Samaw'al cite un paragraphe d'un écrit d'al-Bīrīnī qui montre bien que ce dernier connaissait non seulement la méthode d'interpolation quadratique de Brahmagupta, mais également une autre methode indienne. Al-Samaw'al éetudie ces méthodes ainsi que l'interpolation linéaire, les compare les unes aux autres et par conséquent s'interroge sur leurs performances respectives afin d'opter pour la meilleure, et tente de les perfectionner. Dans cet article, l'auteur montre qu'al-Bīrūnī disposait de quatre méthodes d'interpolation, dont deux sont d'origine indienne, et qu'al-Samaw'al a introduit explicitement une nouvelle interrogation pour juger de la performance des différentes méthodes; il restitue les études d'al- Bī;rūnī et d'al-Samaw'al dans le mouvement actif de recherche sur les méthodes numériques, et reprend avec des moyens modernes la comparaison entre les diverses méthodes pour comprendre les choix des différents mathématiciens. L'auteur établit et traduit le texte d'al-Samaw'al afin de le rendre accessible aux historiens des mathématiques arabes et indiennes, et pour permettre aux lecteurs de suivre l'exposé' historique et mathématique qui vise, au-delà de ces résultats, à mieux connaître l'apport de certaines recherches en astronomie au développement des mathématiques, et d'autre part, la contribution des mathématiciens de l'Inde à l'histoire des mathématiques arabes. (shrink)

In the age of rapid AI advancement, digital colonialism poses a significant threat to Indigenous communities, perpetuating inequalities and exploiting their data. This commentary delves into the concept of Indigenous data sovereignty as a powerful framework for resisting digital colonialism and promoting ethical AI development.

Al-Q, mathematician of the 10th century, examines critically two arguments in the 6th book of the Aristotelian Physics. This critic does not follow the method of the philosophers, with doctrinal amendments, but with a mathematical and experimental style. For understanding of this critical examination and its influence, it is necessary to situate it in the mathesis of al-Q and to produce its mechanical presuppositions. This is the purpose of the author of this paper.

Among the phenomena examined in the Meteorologica, some, although they are sublunar, are too distant to be accessible to direct study. To remedy this situation, it was necessary to develop procedures and methods which could allow observation, and above all the geometrical control of observations. The eventual result of this research was to detach the phenomenon under consideration from meteorology, and to insert it within optics or astronomy. Abū Sahl al-Qūhī, composed a treatise on shooting stars in which he carries (...) out such an insertion. In a second treatise, he deals with another type of observation, intended to measure maritime, terrestrial, and celestial surfaces. Here, the author studies al-Qūhī's contribution and gives the editio princeps of these two treatises, as well as their translation. (shrink)

This study attempts to scrutinize Herbert George Wells’ The Island of Doctor Moreau according to Francesca Ferrando’s Posthumanism Theory (2009). It approaches vital issues and questions via the posthumanist criticism of the main character Dr. Moreau in the novel depending on the application issues of Ferrando’s theory. Wells’ The Island of Doctor Moreau (1896) presents a realistic reading of the modern debate of Posthumanism according to the moral and social world of human identity. Furthermore, this study exposes the importance of (...) Posthumanism as an essential concept in highlighting techno-science in current studies and futuristic ones. Thus, Wells’ novel deals with the effect of biotechnology and medicine on human identity, reflected in the theory of evolution and the posthuman theory. Embodied by Ferrando’s work, the study significantly aims to stimulate a new dimension of understanding, sympathy, interconnectedness, like-mindedness, and honor all species. Such a standpoint exposes the historical and scientific technology context of the novel. On the other hand, it shows the conceptual foundations of posthumanity embedded in the delusion of Charles Darwin’s On the Origin of Species (1859). The novel mirrors the impossible ethics of evolution theory in addition to the common problematic sympathy for all species whether human or nonhuman. (shrink)

"Thabit ibn Qurra est l'un des esprits les plus originaux de tous les temps. On lui doit le premier dépassement de Ptolémée en astronomie et la première critique radicale de l'ontologie aristotélicienne au nom de l'idéalisme mathématique. Au vu de son importance historique, il était urgent de publier ses œuvres encore inédites, ou non éditées de manière critique, et de les étudier de manière véritablement historique. On trouvera, dans cet ouvrage, l'édition, la traduction et le commentaire d'une douzaine de ses (...) opuscules mathématiques et philosophiques, éclairant différentes facettes de son génie universel."--. (shrink)

Obituaries Roshdi Rashed, Arabic Sciences and Philosophy, FirstView Article.

A questionnaire survey of 408 households explored the role of socio-economic and cultural factors in rice (Oryza sativa L.) varietal diversity management on-farm in two contrasting eco-sites in Nepal. Multiple regression outputs suggest that number of parcels of land, livestock number, number of rice ecosystems, agro-ecology (altitude), and use of chemical fertilizer have a significant positive influence on landrace diversity on-farm, while membership in farmers’ groups linked to extension services has significant but negative influence on landrace diversity. Factors with significant (...) positive influence on diversity of modern varieties on-farm were number of parcels of land and of rice ecosystems, access to irrigation, membership in farmers’ groups, and use of insecticide. Within communities, resource-endowed households maintain significantly higher varietal diversity on-farm than resource-poor households and play a significant role in conserving landraces that are vulnerable to genetic erosion and those with socio-cultural and market-preferred traits. Resource-poor households also contribute to local diversity conservation but at lower richness and area coverage levels than resource-endowed households. Households where a female had assumed the role of head of household due to death or migrant work of her husband had less diversity due to lower labor availability. Landraces with socio-cultural and market-preferred traits are few in number but have potential to be conserved on-farm. (shrink)

Né le 4 février 1917 dans un village des environs de Damiette, ‘Abd al-Rahmān Badaī s'est éteint au Caire, où il avait étudié puis enseigné – à l'Universitél – avant de joindre l'Université d'Héliopoplis. ‘A. Badawī nous laisse une oeuvre monumentale, plus de cent-vingt livres en arabe et cinq autres en français. Mondialement connu, son impact sur l'histoire de la philosophie grecque, sur l'histoire de la philosophie islamique et sur la pensée arabe au cours de la seconde moitié du XX (...) e siècle, est immense et incontestable. Travailleur solitaire et acharné, il n'a jamais été égalé pour ses connaissances tant linguistiques que philosophiques et historiques, et surtout pour l'étendue des champs du savoir qu'il a pu couvrir. (shrink)

This publication of al-Kindī's Optics and Catoptrics provides editio princeps and the first translation of three books including the Rectification of Euclid's Optics hitherto unknown. In this book, the reader will find genuine and new information about Greek and Arabic optics and catoptics.

Ever since its publication by Heiberg in the 19th century, we have known that the surviving Greek text of The Measurement of the Circle by Archimedes is faulty, altered by the intervention of a compiler. At least some parts of it are therefore of dubious authenticity. More recently, an examination of the ninth-century Latin translation of the Arabic translation of this text has led to the conclusion that the translated Greek manuscript belongs to a better and older textual tradition than (...) the text edited by Heiberg. This study contains the editio princeps of the Arabic translation of The Measurement of the Circle, its first translation and a historical and mathematical analysis. The many readings of this translation over the centuries have inspired several “redactions.” Three of these will be edited, translated and examined in a forthcoming study. (shrink)

The author examines the relationship between mathematics and philosophy in the works of al-Kind on the approximation of 's knowledge of mathematics, and on the history of the transmission of The Measurement of the Circle of Archimedes. The author shows that al-Kind M, and that it was one of the sources of the Florence Versions, the Latin commentary on the same proposition.

Rhythm is a poetic necessity for constructing a poem, which in turn gives us other rhythms and other phonemes in the background of the meter, and behind the words, and hence the meter does not constitute a major value in constructing a poem unless it is linked to other artistic elements of writing poetry. In this section, we address the rhythmic phenomenon in the introductions to poetry collections in various forms of Arabic poetry: classical, free metrical, and prose poetry, by (...) reading a number of diverse poetic models, starting from the fact that poetry is not poetry, and that poetic meters do not form a poem except to the extent that the poet invests in other elements of poetry, in the image, style, density and depth of language, and rhetorical diversification in performing the poem, and also departing from the pattern by renewing and developing and striving to create advanced innovations in the broad rhythmic horizon, and in the formative and linguistic horizon of poetic introductions, and in this section we have monitored a group of rhythmic phenomena such as: repetition, phonemes of language, the rhythm of the visual space of writing, and the relationship between effect and reception. In light of this awareness, poetic introductions may come in a multi-rhythmic form that does not necessarily stop at the inherited poetic form, but rather varies in its performance and in the methods of delivery, investing the space of the poetic page in conveying the poet’s semantic vision. (shrink)

Religion (dharma) plays a vital role in the Hindu (Sanatana) quest for understanding and practicing harmony between nature and humanity that result into the formation of a cosmological awakening, i.e. 'transcending the universe.' The importance and applicability of such new consciousness is a sign in promoting global humanism in the 21st century, where environmental ethics and sustainability are the wheels of making the future more humane and peaceful. Arne Naess, who coined the term 'deep ecology' conceiving humankind as an integral (...) part of its environment, gives credit to Gandhi. Gandhi’s contributions help to re-awaken the human spirit to self-realisation, finally leading to revelation promoting human coexistence with nature sustainably, mostly through re-interpretation of Vedantic thought. Under the SDGs (Sustainable Development Goals) the ideas of Gandhi are recognised as a path that makes human coexistence stronger, feasible and co-sharedness, sustainable in peace and harmony with nature. This essay presents ecospiritual contextuality and its vitality concerning a sustainable perspective in line with Gandhi's vision and way of life. (shrink)

Wittgenstein’s philosophical methods have had a wide influence in the fields of ethics and moral philosophy. The aim of the volume Ethics After Wittgenstein: Contemplation and Critique is to outlin...

This paper presents a profile of the welfare regime in Lebanon which is posited on the twin precepts of human ethics and welfare particularism. It highlights the key role that moral values play in the conceptualization and implementation of social policy, as well as in the measurement of welfare outcomes. This is marked by the dominance of duty, traditionalism and elitism in the ethics of religious welfare in Lebanon. The paper argues that the social welfare regime in Lebanon overlaps with (...) the debates on the ethics of care and on virtue ethics in Western moral philosophy. This is also linked in with contemporary conceptualizations of religious ethics in Judaism, Christianity and Islam. The paper asserts that religious ethics is a valid endeavour in its own right and an ever more pertinent subject matter for the study of social welfare and social policy. This challenges the traditional dichotomy between reason and faith which has subdued the relevance of religion to public life. Indeed, religion, the nuclear family and clientelism networks are shown to play a critical role in Lebanese social welfare, such that, in spite of state incapacity, the welfare regime there cannot be considered rudimentary. The method adopted for this research was a large qualitative case study involving service providers and users at the Ministry of Social Affairs and five leading Christian and Muslim religious welfare organizations in Lebanon. (shrink)

Among the phenomena examined in the Meteorologica , some, although they are sublunar, are too distant to be accessible to direct study. To remedy this situation, it was necessary to develop procedures and methods which could allow observation, and above all the geometrical control of observations. The eventual result of this research was to detach the phenomenon under consideration from meteorology, and to insert it within optics or astronomy. Abū Sahl al-Qūhī , composed a treatise on shooting stars in which (...) he carries out such an insertion. In a second treatise, he deals with another type of observation, intended to measure maritime, terrestrial, and celestial surfaces. Here, the author studies al-Qūhī's contribution and gives the editio princeps of these two treatises, as well as their translation. (shrink)

RésuméDans l’Almageste, Ptolémée a proposé le concept du mouvement d'enroulement pour expliquer notamment les latitudes planétaires. Ibn al-Haytham a rédigé un traité intitulé Fī ḥarakat al-iltifāf, « Surle mouvement d'enroulement ». Un anonyme a écrit une critique de ce traité. Les deux mémoires sont perdus; mais heureusement a survécu la réponse d'Ibn al-Haytham, intitulée Fī ḥall šukūk ḥarakat al-iltifāf, « La résolution des doutes sur le mouvement d'enroulement ». Il y rappelle le modèle élaboré et en détaille encore l'explication. Nous (...) donnons ici édition critique, traduction et commentaire de cette réponse, ainsi qu'une édition et traduction de passages apparentés des Hypothèses planétaires de Ptolémée et de la Nihāyat al-idrāk de Quṭb al-Dīn al-Shīrāzī. (shrink)

This article includes the editio princeps of Ibn al-Hayṯam’s treatise “On the Parabolic Burning Mirror,” Fī al-marāyā al-muḥriqa bi-al-quṭūʿ, as well as its first translation into French. We examine its place in the history of the parabolic mirror for more than a millennium and a half, in Greek as well as in Arabic and Latin.

Drawing on social cognitive theory, this study extends our understanding of the relationship between ethical leadership and employee work engagement, by exploring self-efficacy as an important mediating variable. In addition, we propose that the quality of LMX moderates the relationships such that the direct and indirect relationships between ethical leadership, self-efficacy, and work engagement are stronger when the quality of LMX is high. Data collected in two-waves from 373 respondents working in different manufacturing organizations of Pakistan supported our hypothesized theoretical (...) model. Theoretical and practical implications are discussed. (shrink)

RésuméLes mathématiciens et les philosophes arabophones, comme leurs prédécesseurs grecs, ont soulevé plusieurs questions épistémologiques fondamentales. Parmi ces questions figure celle qui porte sur le concept d’égalité et sur celui de congruence des grandeurs géométriques. Mais qu'entendait-on par de tels concepts? quelle était leur relation à l'idée de mouvement? Comme les réponses à ces questions combinaient souvent des éléments métriques et d'autres, philosophiques, j'ai choisi d’étudier celles d'un mathématicien, d'un philosophe et d'un mathématicien-philosophe.

Abstract The apparent contradictory relationship between Islam and evolution is important because it has been cited as an example of contradiction between religion and science by both thinkers in the West and Muslims. Muslim scholars and scientists mainly disagree with evolution's legitimacy. Islam's Quantum Question by Nidhal Guessoum is a unique narrative providing in one of its first chapters an overview of evolution from neo-Darwinists to creationists, including the views of scholars throughout Islamic history. Guessoum then proceeds to advocate for (...) evolution. Drawing from Nidhal Guessoum's work, I highlight the reasons why there is an apparent contradiction between Islam and science—and, in particular, Islam and evolution—which include lack of freedom of thought and misinterpretation of the Qur’an. In doing so, I suggest setting the stage for a new Einsteinian theory of evolution, which involves the dimension of time and human cognition. (shrink)

From the second half of the 10th century, mathematicians developed a new chapter in the geometry of conic sections, dealing with the theory and practice of their continuous drawing. In this article, we propose to sketch the history of this chapter in the writings of al-Qūhī and al-Sijzī. A hitherto unknown treatise by al-Sijzī - established, translated, and commented - has enabled us better to situate and understand the themes of this new research, and how it eventually approached the problem (...) of the classification of curves in previously unknown terms. (shrink)

RésuméC'est le premier d'une série d'articles comportant quatre textes composés entre le XIeet le XIIIesiècle, qui traitent de la proposition 5 du livre III desSphériquesde Ménélaüs. Le premier article comprend des commentaires historiques et mathématiques de l'œuvre d'Ibn ʿIrāq en géométrie sphérique et une édition critique des deux textes qu'il a consacrés à la rectification de la proposition III.5, ainsi que la traduction de ces deux textes. Le second article propose une édition critique des textes de Naṣīr al-Dīn al-Ṭūsī et (...) d'Ibn Abī Jarrāda sur le même sujet, cette fois aussi avec une traduction et des commentaires historiques et mathématiques. (shrink)

This book offers a resolution of the paradox posed by the pleasure of tragedy by returning to its earliest articulations in archaic Greek poetry and its subsequent emergence as a philosophical problem in Plato's Republic. Socrates' claim that tragic poetry satisfies our 'hunger for tears' hearkens back to archaic conceptions of both poetry and mourning that suggest a common source of pleasure in the human appetite for heightened forms of emotional distress. By unearthing a psychosomatic model of aesthetic engagement implicit (...) in archaic poetry and philosophically elaborated by Plato, this volume not only sheds new light on the Republic's notorious indictment of poetry, but also identifies rationally and ethically disinterested sources of value in our pursuit of aesthetic states. In doing so the book resolves an intractable paradox in aesthetic theory and human psychology: the appeal of painful emotions. (shrink)

This article examines the development of the ritual of mubāhala, a category of oaths and mutual self-cursing, during which two individuals seek to confirm the veracity of their creedal position by appealing to God’s curse upon them. Based on a prophetic precedent embedded in Q 3:61 and reported as a challenge purportedly employed by the Companions Ibn Masʿūd and Ibn ʿAbbās, I argue that the practice of resorting to mubāhala in the Sunni tradition goes through two main phases of reinvention (...) and legitimation before its reappearance in the contemporary Muslim world. The first phase belongs to the anti-Monist controversies of the seventh to ninth/thirteenth to fifteenth centuries, while the second appears among reformist scholars starting in the late eighteenth century. (shrink)

Mitter's study argues that until the late Qing, concepts of international order and justice were alien to China's imperial rulers. Subsequently, however, in the nineteenth and early twentieth centuries, China perceived itself to be the victim in an unjust world of aggressive, powerful, Western states. Contemporary Chinese perceptions of a just international order have been shaped by such past experiences and encompass a strong element of restitution. Its justice claims start with the Chinese state itself rather than with the needs (...) of a broader global community. (shrink)

Interleukin‐1 receptor‐associated kinase‐1 (IRAK1) is linked to the pathogenesis of atherosclerosis; however, its role in macrophage foam cell formation is not known. Therefore, the present study investigated the role of IRAK1 in lipid uptake, biosynthesis, and efflux in THP‐1 derived macrophages and human monocyte‐derived macrophages (HMDMs). Ox‐LDL (40 μg/mL, 15 minutes–48 hours) treatment induced time‐dependent increase in IRAK1, IRAK4, and Stat1 activation in THP‐1 derived macrophages. IRAK1/4 inhibitor (INH) or IRAK1 siRNA significantly attenuated cholesterol accumulation, DiI‐Ox‐LDL binding, and uptake while (...) cholesterol efflux to apoAI and HDL was enhanced in THP‐1 derived macrophages and HMDMs. Ox‐LDL treatment significantly increased the mRNA expression of CD36, LOX‐1, SR‐A, ABCA1, ABCG1, Caveolin‐1, CYP27A1 while that of SR‐BI was decreased. IRAK1/4 inhibition or IRAK1 knockdown, however, attenuated Ox‐LDL‐induced CD36 expression; augmented ABCA1 and ABCG1 expression while expression of others was unaffected in THP‐1 derived macrophages and HMDMs. Moreover, IRAK1/4 inhibition had no significant effect on genes involved in lipid biosynthesis. In IRAK1/4 INH pre‐treated THP‐1 derived macrophages Ox‐LDL‐induced Stat1 phosphorylation and its binding to CD36 promoter was significantly attenuated while LXRα expression and its binding to the ABCA1/ABCG1 locus, NFATc2 activation and its binding to ABCA1 locus was enhanced. The present study thus demonstrates that IRAK regulates lipid accumulation by modulating CD36‐mediated uptake and ABCA1‐, ABCG1‐dependent cholesterol efflux. Therefore, IRAK1 can be a potential target for preventing macrophage foam cell formation. (shrink)

RésuméCet article examine l'opposition entre preuve directe et preuve per impossibile, introduite en géométrie par al-Sijzī dans un mémoire intitulé Le côté n'est pas commensurable à la diagonale. À partir de cet exemple qu'il donne pour illustrer cette opposition, al-Sijzī défend en effet la supériorité de la preuve directe. L'article propose également l'editio princeps et la première traduction de ce mémoire.

From Euclid to the second half of the 17th century, mathematicians as well as philosophers continued to raise the question of the angle of contact and, generally, of the concept of angle. This article is the first essay devoted to this subject in Arabic mathematics. It deals with Greek writings translated into Arabic on the one hand, and contributions of Arabic mathematicians on the other hand: al-Nayrīzī, Ibn al-Haytham, al-Samawʾal, al-Shīrāzī, al-Fārisī, al-Qūshjī, among others. Most of these contributions are hitherto (...) unknown.Depuis Euclide jusque tard dans le xviie siècle, mathématiciens et philosophes n'ont cessé de s'interroger sur l'angle de contingence et, plus généralement, sur la notion d'angle. Cet article est le premier essai où sont examinés les écrits grecs portant sur ce thème et transmis en arabe, ainsi que les nombreux travaux, pour la plupart jusqu'ici inconnus, des mathématiciens arabes eux-mêmes: al-Nayrīzī, Ibn al-Haytham, al-Samawʾal, al-Shīrāzī, al-Fārisī, al-Qūshjī, entre autres.Send article to KindleTo send this article to your Kindle, first ensure [email protected] is added to your Approved Personal Document E-mail List under your Personal Document Settings on the Manage Your Content and Devices page of your Amazon account. Then enter the ‘name’ part of your Kindle email address below. Find out more about sending to your Kindle. Find out more about sending to your Kindle. Note you can select to send to either the @free.kindle.com or @kindle.com variations. ‘@free.kindle.com’ emails are free but can only be sent to your device when it is connected to wi-fi. ‘@kindle.com’ emails can be delivered even when you are not connected to wi-fi, but note that service fees apply. Find out more about the Kindle Personal Document Service.L'ANGLE DE CONTINGENCE: UN PROBLÈME DE PHILOSOPHIE DES MATHÉMATIQUESVolume 22, Issue 1Roshdi Rashed DOI: https://doi.org/10.1017/S0957423911000087Your Kindle email address Please provide your Kindle [email protected]@kindle.com Available formats PDF Please select a format to send. By using this service, you agree that you will only keep articles for personal use, and will not openly distribute them via Dropbox, Google Drive or other file sharing services. Please confirm that you accept the terms of use. Cancel Send ×Send article to Dropbox To send this article to your Dropbox account, please select one or more formats and confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your account. Find out more about sending content to Dropbox. L'ANGLE DE CONTINGENCE: UN PROBLÈME DE PHILOSOPHIE DES MATHÉMATIQUESVolume 22, Issue 1Roshdi Rashed DOI: https://doi.org/10.1017/S0957423911000087Available formats PDF Please select a format to send. By using this service, you agree that you will only keep articles for personal use, and will not openly distribute them via Dropbox, Google Drive or other file sharing services. Please confirm that you accept the terms of use. Cancel Send ×Send article to Google Drive To send this article to your Google Drive account, please select one or more formats and confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your account. Find out more about sending content to Google Drive. L'ANGLE DE CONTINGENCE: UN PROBLÈME DE PHILOSOPHIE DES MATHÉMATIQUESVolume 22, Issue 1Roshdi Rashed DOI: https://doi.org/10.1017/S0957423911000087Available formats PDF Please select a format to send. By using this service, you agree that you will only keep articles for personal use, and will not openly distribute them via Dropbox, Google Drive or other file sharing services. Please confirm that you accept the terms of use. Cancel Send ×Export citation Request permission. (shrink)