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.

Plato's Ion develops a concept of fiction distinct from the mimetic accounts of poetry found in the Republic and Aristotle's Poetics. The dialogue dramatically exposes the fictionality of poetry by (1) revealing a disparity between propositional and poetic semantics, (2) identifying the paradox of belief in imaginary worlds, and (3) showing that fictional constructions emerge from novel arrangements of real-world facts. Ultimately, the Ion examines the fraught relationship between literature and the real world, and the peculiar nature of literary knowledge, (...) which takes both fact and fiction as its objects. (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...

In a communication network with a source node, a multicast tree is defined as a tree rooted at the source node and all its leaves being recipients of the multicast originating at the source. The tree or bandwidth cost is normally measured by its utilization of tree links along with the quality of service measures such as delay constraint and end-to-end delay. However, if nodes are allowed to join or leave the multicast group at any time during the lifetime of (...) the multicast connection, then the problem is known as dynamic multicast routing problem. In this article, we combine a greedy approach with static multicast routing using Tabu Search to find a low-cost dynamic multicast tree with desirable QoS parameters. The proposed algorithm is then compared with several static multicast routing algorithms. The simulation results show that, on a large number of events, i.e., where nodes are leaving or joining, the proposed algorithm is able to find multicast trees of lower cost and more desirable QoS properties. (shrink)

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)

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)

Codes of ethics in journalism in the light of Koran and Hadith (Islamic traditions).

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)

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)

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)

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)

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)

The focus of our research has been the definitions of pleasure in Ibn Sīnā’s philosophy. For that purpose we worked on identifying the principles upon which this issue has been built. In this context we made a comparison between intellectual pleasure and sensual pleasure. We came to the conclusion that the former is better than the latter. This in turn helped us make the distinction between the pleasure that occurs to us before the soul’s separation from the body and the (...) other which is after the separation. Hence we were able to recognize that man cannot obtain real happiness in this world, tarnished with vice, or only a little. That little happiness is absolutely incomparable with real happiness which occurs only after the separation of the soul from the body. (shrink)

This article is a preliminary draft for initiating and commencing a new pioneer dimension of expression. To deal with higher-dimensional data or information flowing in this modern era of information technology and artificial intelligence, some innovative super algebraic structures are essential to be formulated. In this paper, we have introduced such matrices that have multiple layers and clusters of layers to portray multi-dimensional data or massively dispersed information of the plithogenic universe made up of numerous subjects their attributes, and sub-attributes. (...) For grasping that field of parallel information, events, and realities flowing from the micro to the macro level of universes, we have constructed hypersoft and hyper-super-soft matrices in a Plithogenic Fuzzy environment. These Matrices classify the non-physical attributes by accumulating the physical subjects and further sort the physical subjects by accumulating their non-physical attributes. We presented themasPlithogenicAttributiveSubjectivelyWholeHyper-Super-Soft-Matrix(PASWHSS-Matrix)andPlithogenic Subjective Attributively Whole-Hyper-Super-Soft-Matrix (PSAWHSS-Matrix). Several types of views and level-layers of these matrices are described. In addition, some local aggregation operators for Plithogenic Fuzzy Hypersoft Set (PPFHS-Set) are developed. Finally, few applications of these matrices and operators are used as numerical examples of COVID-19 data structures. (shrink)

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)

Cloud computing paradigm is growing rapidly, and it allows users to get services via the Internet as pay-per-use and it is convenient for developing, deploying, and accessing mobile applications. Currently, security is a requisite concern owning to the open and distributed nature of the cloud. Copious amounts of data are responsible for alluring hackers. Thus, developing efficacious IDS is an imperative task. This article analyzed four intrusion detection systems for the detection of attacks. Two standard benchmark datasets, namely, NSL-KDD and (...) UNSW-NB15, were used for the simulations. Additionally, this study highlights the proliferating challenges for the security of sensitive user data and gives useful recommendations to address the identified issues. Finally, the projected results show that the hybridization method with support vector machine classifier outperforms the existing techniques in the case of the datasets investigated. (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)

Research on human subjects is ethically justified when its anticipated results would ultimately benefit the society or public and not only the individuals participating in this research. Besides contributing to scientific knowledge, social benefits of scientific research may extend to all aspects of the public’s life including health, education, and security. In this paper, we aimed to discuss the social benefits principle as an ethical requirement for the conduct of scientific research in general and nursing research in particular. We critically (...) examined the current situation of nursing research in developing countries including its adherence to the social benefits principle and provided exemplars of both hindered and successful utilization of nursing research evidence in developing countries. We concluded that the utilization of nursing research evidence in clinical practice, education, and policy making is almost nonexistent and faces many challenges in most developing countries. Thus, most nursing research in developing countries are not currently meeting the social benefit principle of the ethical conduct of scientific research. We provided recommendations to promote the utilization of nursing research in evidence-based practice, nursing education, and health policy. (shrink)

The focus of this study is an examination of what it means to be a legal person and the role that the law plays in bestowing the legal status of being a person. This study highlights the underpinning rationalities and human interest that establish a hierarchy between person, defined as “human”, at a superior level to everything else, defined as “nonhuman”. In this respect, there is a core notion concerning human exceptionalism based on the rational sovereignty that justifies and consolidates (...) the mastery of nature. To understand the fundamental premises of legal personhood, it begins from the first usage of person in history and philosophy, since the concept of legal personhood has been established through historical and philosophical developments. Analysing the meaning of person through different conceptualisations can allow a deeper insight into the legal interpretation of personhood. As a result of such investigation, two main dualistic structures of legal personhood reveal: the person-property dualism and the human being-person dualism. Thus, legal personhood simultaneously includes personalisation and depersonalisation, and always operates in a hierarchical array. Although the division between persons and things in the concept of personhood is rigid, being a “person” or a “thing” is open to interpretation in different circumstances through legal practices of exclusion and inclusion. Recently, there have been an increasing number of court rulings and a tendency of legislation to recognise the legal personhood of natural entities as a legal way of conserving the environment. This leads to an interpretation that legal recognition is a matter of institutional interest and attempts. Nevertheless, legal practitioners mostly prefer to confer certain rights or the status of a legal person on nature without the consideration of legal personhood’s background as seen in the case discussed in this study - the Tierra Digna case in Colombia. While this study endeavours to demonstrate the anthropocentric standard view of legal personhood, its principal purpose is to indicate the malleable nature of legal personhood as a product of legal fiction. In this context, this study aims to conclude that law’s imaginary nature should be used for producing a new legal reasoning and for offering a real paradigm shift that is congruent with the plasticity of and the fluidity of nature. (shrink)

The correlation coefficient between two variables plays an important role in statistics. Also, the accuracy of relevance assessment depends on information from a set of discourses. The data collected from numerous statistical studies are full of exceptions. The Pythagorean fuzzy hypersoft set is a parameterized family that deals with the subattributes of the parameters and an appropriate extension of the Pythagorean fuzzy soft set. It is also the generalization of the intuitionistic fuzzy hypersoft set, which is used to accurately assess (...) insufficiency, anxiety, and uncertainties in decision-making. The PFHSS can accommodate more uncertainties compared to the IFHSS, and it is the most substantial methodology to describe fuzzy information in the decision-making process. The core objective of the this study is to develop the notion and features of the correlation coefficient and the weighted correlation coefficient for PFHSS and to introduce the aggregation operators such as Pythagorean fuzzy hypersoft weighted average and Pythagorean fuzzy hypersoft weighted geometric operators under the PFHSS scenario. A prioritization technique for order preference by similarity to the ideal solution under PFHSS based on correlation coefficients and weighted correlation coefficients is presented. Through the developed methodology, a technique for solving multiattribute group decision-making problem is planned. Also, the importance of the developed methodology and its application in indicating multipurpose antivirus mask throughout the COVID-19 pandemic period is presented. A brief comparative analysis is described with the advantages, effectiveness, and flexibility of numerous existing studies that demonstrate the effectiveness of the proposed method. (shrink)

Ethical research conduct is a cornerstone of research practice particularly when research participants include vulnerable populations. This study mapped the extent of reporting ethical research practices in studies conducted among refugees and war-affected populations in the Arab World, and assessed variations by time, country of study, and study characteristics. An electronic search of eight databases resulted in 5668 unique records published between 2000 and 2013. Scoping review yielded 164 eligible articles for analyses. Ethical research practices, including obtaining institutional approval, access (...) to the community/research site, and informed consent/assent from the research participants, were reported in 48.2, 54.9, and 53.7% of the publications, respectively. Institutional approval was significantly more likely to be reported when the research was biomedical in nature compared to public health and social, when the study employed quantitative compared to qualitative or mixed methodologies, and when the journal required a statement on ethical declarations. Institutional approval was least likely to be reported in papers that were sole-authored, when these did not mention a funding source, or when published in national journals. Similar results were obtained for access to the community site and for seeking informed consent/assent from study participants. The responsibility of inadequacies in adherence to ethical research conduct in crisis settings is born by a multitude of stakeholders including funding agencies, institutional research boards, researchers and international relief organizations involved in research, as well as journal editors, all of whom need to play a more proactive role for enhancing the practice of ethical research conduct in conflict settings. (shrink)

The literature on Black youth culture, especially hip-hop culture, has focused primarily on the experiences of young men, with the experiences of Black girls being all but ignored. However, the recent appearance of Black women performers, songwriters, and producers in Black popular culture has called attention to the ways in which young Black women use popular culture to negotiate social existence and attempt to express independence, self-reliance, and agency. This article is an exploration of the representations of Black womanhood as (...) expressed in the music videos of Black women performers. The author first identifies themes that reflect controlling images of Black womanhood, then those that exemplify an expression of agency, and finally those appearing ambivalent and contradictory. Overall, the music videos express how young Black women must negotiate sexuality and womanhood in their everyday lives. (shrink)

Understanding the impact of the p53 tumor suppressor pathway on the regulation of genome integrity, cancer development, and cancer treatment has intrigued scientists and clinicians for decades. It appears that the p53 pathway is a central node for nearly all cell stress responses, including: gene expression, DNA repair, cell cycle arrest, metabolic adjustments, apoptosis, and senescence. In the past decade, it has become increasingly clear that p53 function is directly regulated by poly(ADP‐ribose) polymerase‐1 (PARP‐1), a nuclear enzyme involved in DNA (...) repair signaling. Here, we will discuss the impact of PARP‐1 on p53 function, along with a recently described novel role for the reciprocal regulation of p53 regulated, PARP‐1 dependent necrosis following DNA damage. (shrink)

This paper intends to show the evolution of Ethics on the High Middle Ages. The penitential books written in this period are taken as a basis for the reflection.

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)

Academic supervision is considered an important mechanism to improve the performance of an educational institution. This article aims to investigate the situation of academic supervision in Bangladeshi Government Colleges (GCs).The article, in particular, explores the impacts of academic supervision on Bangladeshi students and teachers in developing their competencies and confidence in postsecondary educational settings. The study was conducted employing thequalitative research method and collecting data from in-depth interviews, secondary published literature, such as books, journal articles etc. The study finds that (...) effective academic supervision considerably helps students achieve their learning progress as well as teachers attain their professionalization in the GCs of Bangladesh. Various challenges exist in higher education in Bangladesh, which include the lack of resources, limited use of educational tools and technology, policy problems, lack of sufficient training and scope of research for teachers, and so on. This article has made several recommendations for improving academic supervision to enhance quality education in the Bangladeshi GCs. Philosophy and Progress, Vol#71-72; No#1-2; Jan-Dec 2022 P 97-128. (shrink)

This paper intends to enhance the great relevance that the promotion of reason received in the XIIth century. The main representatives of thought in this century can be considered, at least in a certain sense, as antecedents to what later was the European Illustration. Indeed their emphasis on rationality is huge.

The Iraqi constitution of 2005 grants freedom of religious thought, belief and practice for all religions. This study was also based on the premise that the constitutional rights are not adhered to in Iraq, even by government officials, which could be due to the absence of suitable legislations subsequent to the framing of the constitutional provisions. An analytical and descriptive research design was adopted for this study. Data was collected from primary and secondary sources through documentation research and evaluation of (...) historical sources. The primary data comprised Articles of the Iraqi constitution, and a few national and international legal instruments related to religious freedom. Secondary data included empirical research studies, books, articles and other published sources. This study therefore took the form of an empirical legal research as it involved the issues of constitutional reforms in the field of religious freedom. A comparative approach was adopted in analyzing the documents about religion and politics related to both the Arab region and the West. The focus was on the measures that should be adopted to advance the dialogues of religious freedom and maintain religious neutrality in all government policies. The study found out that there were apparent contradictions between the constitutional provisions and the State Laws. Similarly, the Iraqi civil and penal codes remain silent regarding legal remedies for the violation of constitutional provisions. (shrink)

El presente articulo pretende poner de manifiesto el interés que tienen los libros penitenciales en la Alta Edad Media para informar sobre las costumbres y la vida cotidiana, tanto en lo que se ajusta como en lo que no se ajusta a las normas de conducta.

Little is known about how ambiguity attitudes change when consequences are flipped from gains to losses, particularly in the context of natural sources. Focusing on two such sources of uncertainty - the voter participation rates in the 2019 European elections in France and the UK - we report econometric estimations that jointly capture parametric specifications of attitudes and beliefs in the gain and loss domains. For checking purposes, we also compute indexes of ambiguity attitudes proposed by Baillon et al. (2018). (...) According to our data, attitudes in the loss domain can be inferred from those in the gain domain. Our findings show no significant differences in attitudes between the two natural sources. Furthermore, we observe no differences in beliefs for both sources, regardless of the outcome sign. Our method, which focuses on matching probabilities, offers an efficient approach for investigating ambiguity attitudes and beliefs for natural sources of uncertainty across gains and losses, particularly beneficial in field studies where data collection capabilities may be limited. (shrink)

Dans le cadre des algorithmes numériques introduits et élaborés par les mathématiciens arabes, à partir du ixe siècle, figure l'algorithme de l'extraction de la racine carrée d'un entier naturel. Cet algorithme a été étudié chez plusieurs d'entre eux et surtout bien expliqué par alBaġdādī dans le chapitre « Comment extraire la racine des nombres entiers » de son livre « La complétion du calcul », Al-takmila fī al-ḥisāb 1. Dans ce chapitre, al-Baġdādī expose son travail pédagogiquement en six sections traitant (...) de plusieurs manières différentes le problème de l'extraction de la racine carrée d'un entier 2. À la même époque, dans un texte isolé intitulé « Sur la cause de la racine, de son doublement et de son déplacement 3 », Ibn al-Hayṯam donne une justification géométrique de l'algorithme en se basant sur des notions algébriques précises. (shrink)