In this article, I examine al-Ghazālī’s methodological skepticism and its role in establishing foundational knowledge.Despite the considerable scholarly attention given to The Deliverance from Error (al-Munqidh min al-ḍalāl), the foundationalism present in it has received relatively limited investigation. Al-Ghazālī established the foundations of knowledge by taking his methodological skepticism to its logical conclusions. His engagement with the sources of knowledge, namely, taqlīd, sense perception, and self-evident truths form the cornerstone of his skepticism. To understand how al-Ghazālī finds deliverance from his (...) skeptical impasse, and ultimately establish foundational knowledge, the concepts of “divine light” and fiṭra will be dis­cussed. Unlike Greek skepticism, al-Ghazālī’s skepticism was not a denial of the possibility of knowledge about the nature of reality, nor was it a denial of Muslim doctrine, but a methodological approach to establish the foundations of knowledge. (shrink)

Veissière and colleagues suggest that thinking is entirely based on social norms. I point out that despite the fact that social norms are commonly used to alleviate cognitive processing, some individuals are willing and able to go about the costly process of questioning them and exploring other valuable ways of thinking.

Focusing on Abu Hamid al-Ghazali (d. 1111) - one of the foremost scholars and authorities in the Muslim world who is central to the Islamic intellectual tradition - this book embarks on a study of doubt (shakk) and certainty (yaqin) in his epistemology. The book looks at Ghazali's attitude to philosophical demonstration and Sufism as a means to certainty. In early scholarship surrounding Ghazali, he has often been blamed as the one who single-handedly offered the death-blow to philosophy in the (...) Muslim world. In much of contemporary scholarship, Ghazali is understood to prefer philosophy as the ultimate means to certainty, granting Sufism a secondary status. Hence, much of previous scholarship has either focused on Ghazali as a Sufi or as a philosopher; this book takes a parallel approach, and acknowledges each discipline in its right place. It analyses Ghazali's approach to acquiring certainty, his methodological scepticism, his foundationalism, his attitude to authoritative instruction (ta'lim), and the place of philosophical demonstration and Sufism in his epistemology. Offering a systematic and comprehensive approach to Ghazali's epistemology, this book is a valuable resource for scholars of Islamic philosophy and Sufism in particular, and for educated readers of Islamic studies in general. (shrink)

The article examines Muhammad Asad’s epistemological ground, reflected in his works on the principle of Islamic governance and its basic constitution and foundational structure. In this regard, he formulated the constitutional ideas of the Islamic state, whose constitution contains the provision of Islamic law that practices and implements the norms and postulates of the Divine Writ. This idea was partly enshrined in some of Global South constitutional law, whose political establishment was formed in 1947. It essentially discussed Muhammad Asad’s political (...) ideas and their underlying philosophy as espoused in his works. The work was conducted using qualitative approaches to library research. The data were analyzed using descriptive, analytical, and comparative techniques. The finding shows that Muhammad Asad had formulated a comprehensive theoretical framework of the legal aspect of Islamic governance drawn up from the fundamental principle and doctrine of the sharia and its moral norms deriving from the Qur’anic and the sunnah bases while advocating democratic ideals and principles based on conventional practice and requirement of the modern context of the nation-state. (shrink)

This paper examines public accountants' perceptions of the relative importance of business ethics as a selection criterion for entry-level public accounting positions. Also, it seeks to determine whether gender differences do exist with respect to these perceptions. The data were collected through a survey of 335 professional accountants in four southeastern states. The results show that, among the eight selection factors that were studied, technical competence in accounting, communication skills, and interpersonal skills were the most influential, while professionalism and leadership (...) abilities were the least important. Ethics was ranked fourth by the females and sixth by the males. A multivariate analysis of variance revealed significant differences between the genders with respect to five of the eight factors. The females' scores were higher for ethics and interpersonal skills and lower for conceptual aptitude, strategic thinking, and leadership abilities. Implications for accounting educators and practitioners are discussed. (shrink)

This article extends previous research by investigating the basis for attitudes toward codes of ethics. Specifically, its purposes are threefold. First, to examine business managers' attitudes toward codes of ethics. Second, to ascertain whether gender differences do exist with respect to these attitudes. Third, to provide a benchmark for future studies of attitudes toward codes of ethics. A survey of 286 managers revealed significant differences between the female and male managers with respect to six of the eight variables studied.

The purpose of this paper is to determine whether there is a relationship between a person's degree of religiousness and corporate social responsibility orientation. A total of 411 managers and 506 students from seven universities were surveyed. The statistical analysis showed that religiousness does influence students' orientation toward the economic, ethical, and philanthropic responsibilities of business. It does not, however, have a significant impact upon the managers' attitudes. When the "low religiousness" students and managers were compared, differences were found with (...) respect to the economic, ethical, and philanthropic components of corporate social responsibility. Similar results were obtained when the "high religiousness" students and managers were compared. The implications of these findings are discussed. (shrink)

There is a sizeable group of self-described Christian companies which have declared their belief in the successful merging of biblical principles with business activities. As these companies have become more visible, an increasing number of anecdotal newspaper and magazine articles about these companies have appeared. Surprisingly, no rigorous research has been conducted prior to our recent study. This article provides national estimates of the size and predominant characteristics of self-identified Christian companies. In addition, the study investigated the types of relationships (...) these companies maintained with their employees, customers, communities, and suppliers. (shrink)

The results of a survey of 272 practicing accountants and 374 accounting students enrolled in six universities are analyzed. Differences and similarities between the two groups with regard to their attitudes toward corporate social responsibility are examined. The results indicate that the students exhibit greater concern about the ethical and discretionary components of corporate responsibility and a weaker orientation toward economic performance. No significant differences between the two groups were observed with respect to the legal dimension of corporate social responsibility. (...) Some explanations as well as limited generalizations and implications are developed. (shrink)

. Recent years have witnessed the proliferation of “Christian” companies in the U.S. These firms declare their belief in, and active pursuit of, the successful merging of biblical principles with business activities. Economic success, hard work, and biblical values are seen as capable of existing together in harmony. While the number of such businesses appears to be growing, there has been a dearth of any scientific study of these companies. No empirical research has been conducted to determine whether these religious (...) values and behaviors have any significant impact on a company’s performance. The present study is designed to partially fill this gap. Specifically, it seeks to determine whether there are differences in long-term performance between self-proclaimed “Christian-based” businesses and their secular counterparts. Data were collected from 312 companies. A multivariate analysis of variance (MANOVA), followed by univariate ANOVAs, found significant differences between these two groups of firms on three of the four performance variables that were analyzed. Some explanations as well as limited generalizations and implications are developed. (shrink)

Augmentative and alternative communication systems have been successfully used to help pupils with intellectual and developmental disabilities for functional communication skills. Whereas the effects of the GoTalk NOW application available on the iPad have been investigated, no such study has been conducted in Saudi Arabia. This study investigated the effects of the “model, lead, and test” technique paired with the GoTalk NOW app, which is used to teach four children with intellectual and developmental delays to correctly request. The participants were (...) four children from 6 to 8 years of age with intellectual and developmental disabilities. A multiple baseline design was implemented across all participants. All four participants made clear progress using the GoTalk NOW app on the iPad, and implementation of the MLT technique was successful in helping the participants request correctly and independently. This study provided a practical, effective, and easy-to-use method for special education teachers to teach children with disabilities. It contributes to expand the range of teaching options for children with intellectual and developmental disabilities. (shrink)

Diffusion MRI is widely used to investigate neuronal and structural development of brain. dMRI data is often contaminated with various types of artifacts. Hence, artifact type identification in dMRI volumes is an essential pre-processing step prior to carrying out any further analysis. Manual artifact identification amongst a large pool of dMRI data is a highly labor-intensive task. Previous attempts at automating this process are often limited to a binary classification of the dMRI volumes or focus on detecting a single type (...) of artifact. In this work, we propose a deep learning-based automated multiclass artifact classifier for dMRI volumes. Our proposed framework operates in 2 steps. In the first step, the model predicts labels associated with 3D mutually exclusive collectively exhaustive sub-volumes or “slabs” extracted from whole dMRI volumes. In the second step, through a voting process, the model outputs the artifact class present in the whole volume under investigation. We used two different datasets for training and evaluating our model. Specifically, we utilized 2,494 poor-quality dMRI volumes from the Adolescent Brain Cognitive Development and 4,226 from the Healthy Brain Network dataset. Our results demonstrate accurate multiclass volume-level main artifact type prediction with 96.61 and 97.52% average accuracies on the ABCD and HBN test sets, respectively. Finally, in order to demonstrate the effectiveness of the proposed framework in dMRI pre-processing pipelines, we conducted a proof-of-concept dMRI analysis exploring the relationship between whole-brain fractional anisotropy and participant age, to test whether the use of our model improves the brain-age association. (shrink)

Prior research on sustainable supply chain management (SSCM) has almost exclusively focused on environmental aspects (GSCM—green supply chain management) and the study of its external drivers and consequences. Framing our study within the “strategy‐conduct‐performance” paradigm, we consider the focal firm's role in the implementation of sustainable supply chain initiatives, social as well as environmental. We use data on the S&P 500 Index retrieved from Bloomberg, including variables for two relevant focal firm strategies: (a) reducing the environmental footprint of the supply (...) chain and (b) reducing social risks in the supply chain (SRSS). Hierarchical logit modeling is carried out to examine the sequential impact of governance board characteristics and the focal firm's adoption of related internal policies and practices on the likelihood of implementing these initiatives along the supply chain. Controlling for industry, firm size, and resources, we find that board structure and diversity influence the implementation of sustainable supply chain initiatives by increasing organizational commitment to environmentally friendly and socially responsible policies and practices. Consequently, empirical evidence exists for the importance of strategic factors, namely a proactive corporate stance on sustainability associated with governance board characteristics, as antecedents of sustainable (environmental and social) supply chain initiatives. (shrink)

One area of business performance of particular interest to both scholars and practitioners is corporate social responsibility. The notion that organizations should be attentive to the needs of constituents other than shareholders has been investigated and vigorously debated for over two decades. This has provoked an especially rich and diverse literature investigating the relationship between business and society. As a result, researchers have urged the study of the profiles and backgrounds of corporate upper echelons in order to better understand this (...) relationship.There is ample evidence that corporations have in recent years increased the proportion of outside directors on their boards. This has been partly in reaction to increased interest in the corporate social responsiveness of business organizations and suggestions that the board of directors could play a unique role in this area. The expectation on the part of practitioners, researchers, and governmental regulators is that outside directors will advocate greater corporate responsiveness to society''s needs by playing a more active role in overseeing managerial decisions. (shrink)

The recent failures and scandals involving many large businesses have highlighted the importance of corporate social responsibility as a fundamental factor in the soundness of the free market system. The corporate social responsiveness orientation of business executives plays an important role in corporate decision making since managers make important decisions on behalf of their corporations. This paper explores whether there is a relationship between an individual's degree of religiousness and his or her corporate social responsiveness (CSR) orientation. The results of (...) a survey of 473 business students found a significant relationship between degree of religiousness and attitudes toward the economic and ethical components of CSR. Some explanations as well as limited generalizations and implications are developed. (shrink)

We will study some aspects of the local structure of models of certain C-minimal theories. We will prove (theorem 19) that, in a sufficiently saturated C-minimal structure in which the algebraic closure has the exchange property and which is locally modular, we can construct an infinite type-definable group around any non trivial point (a term to be defined later). On va étudier ici certains aspects de la structure locale des modèles de certaines théories C-minimales. On va prouver (théorème 19) que, (...) dans une structure C-minimale suffisamment saturée, localement modulaire et dans laquelle la clôture algébrique permet de définir une notion de dimension, on peut construire un groupe type-définissable infini autour de tout point non trivial (terme à définir par la suite). (shrink)

The democratic age -- A brief history of human liberty -- The twisted path -- Illiberal democracy -- The Islamic exception -- Too much of a good thing -- The death of authority -- The way out -- The 51st state.

Differences and similarities between inside and outside board members with regard to their attitudes toward corporate social responsibility are examined. The results indicate that outside directors exhibit greater concern about the discretionary component of corporate responsibility and a weaker orientation toward economic performance. No significant differences between the two groups were observed with respect to the legal and ethical dimensions of corporate social responsibility. Some explanations as well as limited generalizations and implications are developed.

Artificial intelligence (AI) national strategies provide countries with a framework for the development and implementation of AI technologies. Sixty countries worldwide published their AI national strategies. The majority of these countries with more than 70% are developed countries. The approach of AI national strategies differentiates between developed and developing countries in several aspects including scientific research, education, talent development, and ethics. This paper examined AI readiness assessment in a developing country (Palestine) to help develop and identify the main pillars of (...) the AI national strategy. AI readiness assessment was applied across education, entrepreneurship, government, and research and development sectors in Palestine (case of a developing country). In addition, it examined the legal framework and whether it is coping with trending technologies. The results revealed that Palestinians have low awareness of AI. Moreover, AI is barely used across several sectors and the legal framework is not coping with trending technologies. The results helped develop and identify the following five main pillars that Palestine’s AI national strategy should focus on: AI for Government, AI for Development, AI for Capacity Building in the private, public and technical and governmental sectors, AI and Legal Framework, and international Activities. (shrink)

Despite the severe social, health, political and economic impacts of the outbreak of Covid-19 on Palestinians, we contend that one positive aspect of this pandemic is that it has revealed the perils and shortcomings of the teacher-centered, traditional education which colonizes students’ minds, compromises their analytical abilities and, paradoxically, places them in a system of oppression which audits their ideas, limits their freedoms, and curtails their creativity. While Israeli occupation has proven to be an obstacle in the face of the (...) Palestinian government’s attempt to combat and contain the Corona crisis, on-line education, the sole arena that escapes this colonial system, has forced many instructors to give up their domination over the process of education and to create a more collaborative atmosphere of education that is based on dialogue, research and flexibility of the curriculum content. This study is designed to gauge English literature students’ responses to this mode of digital learning. We interviewed a hundred students from six English literature programs between March and August, 2020. Thus, through critically examining students’ answers, and by drawing on Freire’s concepts of banking education, consciousness and dialogue, we propose that online education is an important step towards the decolonization of education and a call for a paradigm shift on the account that the existing paradigm of traditional education is stifling students’ creativity and critical thinking. (shrink)

Value Co-Creation plays a major role in engaging knowledgeable individuals in a community via innovation, problem solving, and new service/product development. This study investigates the personal factors that influence individuals’ engagement in value co-creation in Higher Education Institutions through the use of online platforms. Some higher education institutions have successfully established or used appropriate online platforms, such as online forums, web applications, and mobile applications to engage their community in ideation or crowdsourcing as a part of the value co-creation process. (...) On the other hand, some HEIs have failed to engage their community in value co-creation activities, and even if they managed to engage some individuals in value co-creation once, they failed to sustain these individuals’ engagement in value co-creation using online platforms. Using the Stimulus Organism Response framework, this study examines the relationship between relevant personal factors and other motivational factors that provide perceived benefits with value co-creation engagement. Data was collected from 308 respondents at five Malaysian research universities. The software analysis tool Smart PLS is used for data analysis and validation. The results demonstrate that personal factors and perceived benefits as a motivational factor has a significant effect on individual engagement in value co-creation. However, the significance of these findings varies from one individual to another. The implications of these findings are discussed. (shrink)

Juxtaposing Beauvoir’s view of sexual difference in The Second Sex with Michel Houellebecq’s representation of a flailing masculine hegemony in Les Particules élémentaires (Atomised/The Elementary Particles) elucidates how the novel’s main protagonists, Bruno and Michel, fall from transcendence to immanence as they navigate new performances of masculinity that are not anchored in traditional virile models. This article examines how this degradation of self occurs and how it can be read through the actions of the main protagonists of Atomised.

Recent scandals such as those involving Enron and WorldCom (USA), Nortel and Crocus (Canada), and Parmalat and Royal Ahold (EU) exposed failures in corporate governance that shook the capital markets in developed countries and put the spotlight on weak corporate governance in developing, emerging and transitional economies. Companies from developing economies with weak financial transparency and governance will find it difficult to raise capital and attract foreign investors. We investigate the challenges and evaluate the progress of corporate governance in Egypt. (...) Using historical, empirical and interview data, we review the development of stock markets and accounting and financial reporting standards. We analyse the structure of capital markets, major players in the economy, the privatisation policy, board structure and the cultural and legal environment of corporate governance. We review initiatives and impediments for improving corporate governance, including the establishment of the Egyptian Institute of Directors. The implications of this study are important for Egypt, developing countries and global investors seeking international diversification. (shrink)

Navigating organizations through a changing environment is central to leadership. Thus, innovativeness has proven to be critical to the process of achieving strategic competitiveness (Yukl, Leadership in Organizations, 1998). This skill is particularly needed when the firm is confronted with the unique challenges of a religious organization. The existence of innovation and the dependencies that encourage or restrict its existence in this environment are largely unknown. Utilizing a sample of 250 religious organizations in five geographical areas this research explores the (...) impact of the leader tenure on the degree of organizational innovation. An analysis of variance for innovative strategy use across the three tenure groups was significant, F (2, 247) = 6.08, p < 0.01, which indicated innovation differences across the three levels of leader tenure. Post hoc analysis indicated that the low tenure leadership group was associated with lower levels of innovation than either of the other groups. Detailed findings are presented and the managerial implications and suggestions are provided. This research has strong implications for implementation of leadership development and strategic management of the increasing number of socially conscious organizations and organizations with large volunteer components. (shrink)

Automated software engineering has attracted a large amount of research efforts. The use of object-oriented methods for software systems development has made it necessary to develop approaches that automate the construction of different Unified Modeling Language models in a semiautomated approach from textual user requirements. UML use case models represent an essential artifact that provides a perspective of the system under analysis or development. The development of such use case models is very crucial in an object-oriented development method. The main (...) principles used in obtaining these models are described. A natural language processing tool is used to parse different statements of the user requirements written in Arabic to obtain lists of nouns, noun phrases, verbs, verb phrases, etc., that aid in finding potential actors and use cases. A set of steps that represent our approach for constructing a use case model are presented. Finally, the proposed approach is validated using an experiment involving a group of graduate students who are familiar with use case modeling. (shrink)

This book presents a mathematical programming approach to the analysis of production frontiers and efficiency measurement. The authors construct a variety of production frontiers, and by measuring distances to them are able to develop a model of efficient producer behaviour and a taxonomy of possible types of departure from efficiency in various environments. Linear programming is used as an analytical and computational technique in order to accomplish this. The approach developed is then applied to modelling producer behaviour. By focusing on (...) the empirical relevance of production frontiers and distances to them, and applying linear programming techniques to artificial data to illustrate the type of information they can generate, this book provides a unique study in applied production analysis. It will be of interest to scholars and students of economics and operations research, and analysts in business and government. (shrink)

Teachable Moments will look at various pieces of the vocation of what it means to be a teacher in our school buildings today - through all of the most impactful reforms on the fabric of American education.

In recent years there has been a substantial amount of research on emotional intelligence (EI) across a wide range of disciplines. Also, this term has been receiving increasing attention in the popular business press. This article extends previous research by seeking to determine whether there is a relationship between emotional intelligence and ethical judgment among practicing managers with respect to questions of ethical nature that can arise in their professional activity. It analyzes the results of a survey of 324 managers (...) enrolled in executive MBA programs from five universities in the southeastern and northeastern United States. This study is based on a model presented by Forsyth showing two dimensions that play an important role in ethical evaluation and behavior. Respondents were classified into one of four groups according to their idealism and relativism levels—situationists, subjectivists, absolutists, and exceptionists. The four ideological group’s scores were compared. The results indicate significant differences between the situationists and absolutists on the one hand, and subjectivists and exceptionists on the other. The former’s emotional intelligence scores were significantly higher thus demonstrating a strong relationship between emotional intelligence and ethical ideology. The results raise important implications for practitioners and educators. (shrink)

In lieu of an abstract, here is a brief excerpt of the content:Resilience and the Narratives of Parents of Adults with Autism Spectrum DisordersNabil Hassan El-GhorouryThe prevalence of autism spectrum disorders (ASDs) is on the rise; the most recent report from the Autism and Developmental Disabilities Monitoring Network (2012) indicated a prevalence of ASDs of one in 88 children. This was a 78% increase from reported prevalence rates in 2002, when the rate was one in 150. Major health organizations have (...) been emphasizing the importance of early identification (Johnson, Myers, & Council on Children with Disabilities, 2007) to increase access to early intervention services, which are most effective when implemented before age three (Rogers & Vismara, 2008).The bulk of autism research has been focused on children, particularly young children. Given the growing identification and prevalence of ASDs, there will be more and more adolescents and adults with ASDs in the near and long term future. This issue of Narrative Inquiries in Bioethics is important because of its focus on an underrepresented area in the literature. The constraints of current health care delivery systems do not allow for providers to spend significant amounts of time with their patients. Furthermore, hearing first person narratives can be valuable by informing health care professionals about the experiences that parents (and by extension, the individual with an ASD) have experienced.As a licensed clinical psychologist with over two decades of experience with children, adolescents, and adults with ASDs in a variety of settings, I have a professional perspective on autism. As the older brother of Omar, a 38–year–old adult male with autistic disorder, I also have a lifetime of personal experiences of autism. As long as I can remember, I have had a brother with autism. I hope this unique perspective as both a behavioral health care provider and a family member of an adult with an ASD allows me to comment on these narratives in a thoughtful manner.Seeing Beyond Autism: Multiple IdentitiesMany parents commented on how their child was more than just autism or Asperger’s; they reflected on the strengths, unique experiences, and perspectives of their child. The narratives are rich in their desire to see the whole being of their children. Anonymous One writes:Another thing, and I think every parent will agree with this—teachers, school staff, health care industry staff, doctors and every one that comes into contact with an ASD individual—take the time to get to know them. It may be difficult and some may appear non–caring and rude. You must overlook this and look to the person underneath. They are great people. They have been through stuff and it means so much to them. Like I said—parents, you know this. Please remember it when times get tough. [End Page 189]Mark Osteen wrote about his son Cameron as they were making the decision to place their son in a residential placement: “I felt proud. It was like he was being recruited for college. And I am just as proud of him, and love him just as much, as if he were. What I hate is talking only about his ‘disability.’ I hope they see his good qualities. How smart he is. How funny he is. How charming he is. How strong he is.”Understanding the multiple identities of individuals with ASDs is important for parents so that they are not solely focused on the autism diagnosis. The talents and skills of the young adults described are remarkable. Anonymous One’s son David became a computer engineer at 13, reportedly “he was the youngest person in the United States to do so at such a young age.” Lori Centineo’s son Nathaniel is a poet, a rock climber, and skilled at sailing. Virginia Clapp’s son Nathaniel is a “chess genius”, a talented juggler “with the ability to juggle seven balls, which he told me is ‘insanity in a nutshell’,” and an origami expert. David McDonald’s nephew grew from a teenager who spoke only 30 words to speaking thousands of words and ultimately becoming a world traveler. Anonymous Four’s son Sam is “practically an expert” in earth sciences.Seeing beyond the autism is not always easy. Given the serious challenges... (shrink)

Transformational leadership impacts on project and organizational success are well established. However, many underlying factors that make TFL effective are still missing. Therefore, we formulated hypotheses and tested the mediating role of trust and job satisfaction in linking TFL to project success. A time-lagged methodology was used to collect quantitative data using a structured questionnaire from 326 project manager-team member dyads working in Pakistan’s public sector. Our results showed that TS, JS, and TFL significantly impacted project success. Moreover, we found (...) that TS and JS mediate the relationship between TFL and PS. These findings highlight the importance of trust and job satisfaction as mechanisms that translate TFL into the success of projects for organizations. (shrink)

The importance of the Treatise on equations by Sharaf al-Dīn al-Ṭūsī has been brought to our attention by R. Rashed, who underlined the analytical aspects of this essentially algebraic work. Following Rashed, this article concentrates on one of these analytical concepts, namely the maximum of a polynomial expression f of degree 3. The purpose is to clarify the techniques that led al-Ṭūsī, when computing the maximum of f, to systematically display algebraic equations equivalent to f = 0. By demonstrating that (...) al-Ṭūsī's essentially algebraic proofs were also based on analytical procedures, we show that the presence of these equations was not fortuitous, but resulted from a correct understanding of the maximum of f. The accompanying geometrical representations were primarily for illustration. L'importance du Traité des équations de Sharaf al-Dīn al-Ṭūsī, a été mise en évidence par les travaux de R. Rashed, qui ont souligné les aspects analytiques de cette œuvre essentiellement algébrique. Parmi les notions analytiques qui figurent dans le Traité d'al-Ṭūsī, nous évoquerons uniquement celle du maximum d'une expression polynomiale du 3 e degré, f. La présente étude pourrait apporter une contribution à une problématique posée par R. Rashed: élucider les moyens et les techniques qui, lors du calcul du maximum, auraient conduit al-Ṭūsī à mettre systématiquement en valeur des équations équivalentes à fʹ = 0. Notre étude confirme que la présence de telles expressions n'est pas fortuite; elle découle d'une conception correcte du maximum de f. À cet effet, nous montrons que si les démonstrations utilisées par al-Ṭūsī sont essentiellement algébriques, elles s'appuient sur des procédés analytiques; les représentations géométriques qui les accompagnent constituent surtout des moyens de visualisation. (shrink)