2,106 research outputs found
The Extended Fock Basis of Clifford Algebra
We investigate the properties of the Extended Fock Basis (EFB) of Clifford
algebras introduced in [1]. We show that a Clifford algebra can be seen as a
direct sum of multiple spinor subspaces that are characterized as being left
eigenvectors of \Gamma. We also show that a simple spinor, expressed in Fock
basis, can have a maximum number of non zero coordinates that equals the size
of the maximal totally null plane (with the notable exception of vectorial
spaces with 6 dimensions).Comment: Minimal corrections to the published versio
Complex structures and the Elie Cartan approach to the theory of spinors
Each isometric complex structure on a 2-dimensional euclidean space
corresponds to an identification of the Clifford algebra of with the
canonical anticommutation relation algebra for ( fermionic) degrees of
freedom. The simple spinors in the terminology of E.~Cartan or the pure spinors
in the one of C. Chevalley are the associated vacua. The corresponding states
are the Fock states (i.e. pure free states), therefore, none of the above
terminologies is very good.Comment: 10
The Tannakian Formalism and the Langlands Conjectures
Let H be a connected reductive group over an algebraically closed field of
characteristic zero, and let G be an abstract group. In this note we show that
every homomorphism from the Grothendieck semiring of H to that of G which maps
irreducible representations to irreducibles, comes from a group homomorphism
from G to H. We also connect this result with the Langlands conjectures.Comment: 15 page
TBFM IDAC Procedure to Disable NASA Connection with CLT STBO Electronic Requests for Release Times
This document defines the procedure to disconnect TBFM IDAC's connection with ATD-2's STBO System at the Washington Air Route Traffic Center. This is part of the ATD-2 ZDC training package that was presented in September 2017
Primitive filtrations of the modules of invariant logarithmic forms of Coxeter arrangements
We define {\bf primitive derivations} for Coxeter arrangements which may not
be irreducible. Using those derivations, we introduce the {\bf primitive
filtrations} of the module of invariant logarithmic differential forms for an
arbitrary Coxeter arrangement with an arbitrary multiplicity. In particular,
when the Coxeter arrangement is irreducible with a constant multiplicity, the
primitive filtration has already been studied, which generalizes the Hodge
filtration introduced by K. Saito
Réinventer la sexualité: Remarques sur les derniers écrits de Michel Foucault
In this paper I wish to comment on the way we conceive of sexual life today, in connection with Michel Foucaultâs characterization of âSexâ as something that is part of a âdevice for sexualityâ. The paper is divided into three parts. In the first part, I attempt to analyze and criticize some major components of our conceptions of sex, namely (a) our belief that sex is a private matter, (b) the view that erotism succeeds to be a philosophical clue to the Subject-Object predicament (G. Bataille), and (c) the thesis that a new civilization based on Eros might be born (H. Marcuse). In the second part, I focus on Foucaultâs position, which has been widely misunderstood. Foucaultâs general argument was that the mechanics of power in our contemporary societies required a well organized device for sexual practice, theory, medical care and so on, since power required close control over the private life of individuals and the disciplinary training of bodies. He opposed the (c) thesis, which he called the ârepressive hypothesisâ. He also opposed the (b) view, substituting a âgenealogy of the man of desireâ for Batailleâs conception of erotism. Finally he opposed the (a) belief, by bringing in debate the spectacular counter-example of Ancient Greek and Latin conceptions of sexuality, to the understanding of which he devoted the last years of his life. The third part of this paper then develops Foucaultâs basic assumption that in our present time, to resist power will be possible only if we become able to constitute ourselves as individuals in a new way. I argue that the enigma of sex in our lives essentially exhibits our political, philosophical and ethical weakness. With respect to politics we are deprived of the âpower to actâ, since every confrontation between individuals and the City has become delu- sive, thus making the art of Greek tragedy barely impossible. With respect to philosophy, we meet the major challenge of a new characterization of the Subject. With respect to ethics, we face the reality of violence everywhere. Our âprivate tragediesâ demonstrate that we recoil into private life mainly because we feel that we have lost the world.Lâobjet de lâarticle est dâanalyser notre conception contemporaine de la sexualitĂ©, en liaison avec la caractĂ©risation quâen proposait Foucault et qui fait du âSexeâ lâĂ©lĂ©ment central dâun âdispositif de sexualitĂ©â. Dans la premiĂšre partie de lâarticle, je propose dâabord une description critique de certaines des composantes principales de notre conception de la sexualitĂ©, qui sont (a) la conviction que le sexe est une affaire privĂ©e; (b) lâidĂ©e que lâĂ©rotisme pourrait ĂȘtre une solution philosophique providentielle Ă lâopposition du Sujet et de lâObjet (G. Bataille); et (c) la thĂšse quâune civilisation nonrĂ©pressive est possible (H. Marcuse). Dans la seconde partie je commente les positions de Foucault, qui ont Ă©tĂ© souvent mal comprises. La thĂšse gĂ©nĂ©rale de Foucault Ă©tait que les mĂ©canismes du pouvoir, dans les sociĂ©tĂ©s contemporaines, exigent un contrĂŽle Ă©troit de la vie privĂ©e des individus et par lĂ mĂȘme la mise en oeuvre dâun âdispositifâ bien organisĂ© susceptible de rĂ©gir la pratique sexuelle, de mĂȘme que sa thĂ©orisation et sa mĂ©dicalisation. Foucault sâopposait Ă la thĂšse (c), quâil appelait âlâhypothĂšse rĂ©pressiveâ. Il sâopposait Ă©galement Ă (b), en proposant Ă la place de lâĂ©rotisme de Bataille une âgĂ©nĂ©alogie de lâhomme de dĂ©sirâ. Enfin, il sâopposait Ă la conviction (a) en arguant du spectaculaire contre-exemple des conceptions grĂ©co-latines de la sexualitĂ© dans lâAntiquitĂ©, auxquelles il avait consacrĂ© les derniĂšres annĂ©es de sa vie. La troisiĂšme partie de lâarticle dĂ©veloppe Ă partir de lĂ la prĂ©supposition fondamentale de Foucault selon laquelle la rĂ©sistance au pouvoir nâest possible Ă notre Ă©poque que si nous parvenons Ă nous constituir nousmĂȘmes en tant quâindividus dâune maniĂšre nouvelle. En accord avec cette prĂ©supposition, je propose de dire que lâĂ©nigme du sexe dans nos vies exhibe avant tout notre faiblesse politique, philosophique et Ă©thique. En politique nous sommes privĂ©s de la âpuissance dâagirâ parce que toute confrontation effective entre lâindividu et la CitĂ© est devenue illusoire, ce qui scelle lâim- possibilitĂ© de la tragĂ©die grecque. En philosophie nous rencontrons le dĂ©fi majeur de savoir comment dĂ©finir aujourdâhui le concept de Sujet. Du point de vue Ă©thique, nous avons affaire partout Ă la rĂ©alitĂ© de la violence. Nos âtragĂ©dies privĂ©esâ dĂ©montrent que nous ne nous rĂ©fugions dans la vie privĂ©e que parce que nous avons le sentiment dâavoir perdu le monde
L'approche centrée sur le développement du pouvoir d'agir des personnes et des collectivités: un soutien pour la résilience ?
Tout au long de notre existence nous sommes tous confrontĂ©s Ă des difficultĂ©s plus au moins importantes. Et certains dâentre nous se retrouvent Ă faire face Ă des conditions particuliĂšrement dĂ©lĂ©tĂšres. Parfois issues dâennuis financiers ou judiciaires, parfois issues de souffrances familiales ou personnelles, parfois issues dâinĂ©galitĂ©s, la nature et la complexitĂ© de ces conditions varient autant quâil existe dâindividus. Câest donc dans cette grande diversitĂ© que le travailleur social est amenĂ© Ă travailler, devenant temporairement un point dâappui pour que lâindividu puisse composer avec le contexte dans lequel sâinscrit sa situation et transformer cette derniĂšre. Ce travail de recherche sâintĂ©resse Ă la façon dont lâapproche centrĂ©e sur le dĂ©veloppement du pouvoir dâagir des personnes et des collectivitĂ©s (DPA-PC) favorise cette transformation que lâon appelle parfois rĂ©silience
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