3,438 research outputs found
Duals of linearized Reed-Solomon codes
No full textNous donnons une description des duaux des codes de Reed-Solomon linéarisés en termes de codes obtenus en prenant des résidus de fonctions rationnelles des polynômes de Ore. Notre construction montre en particulier, que sous certaines hypothèses sur le corps de base, la classe des codes de Reed-Solomon linéarisés est stable par dualité. Comme sous-produit de notre travail, nous développons une théorie des résidus dans le cadre des polynômes de Ore, étendant les résultats de l’article A theory of residues for skew rational functions de Xavier Caruso.We give a description of the duals of linearized Reed–Solomon codes in terms of codes obtained by taking residues of Ore rational functions. Our construction shows in particular that, under some assumptions on the base field, the class of linearized Reed–Solomon codes is stable under duality. As a byproduct of our work, we develop a theory of residues in the Ore setting, extending the results of A theory of residues for skew rational functions from Xavier Caruso
A saga de um clã Xavier
No full textThe book brings together historical memories of the Xavier family, of which the author is a member, and includes everything from the heroic episode between members of the Xavier family and Lampião's gang, to a Xavier family tree and tributes to the members of this family, as well as photographic records of known members. The author rescues and preserves important memories of the family, reconstructing facts that, if told orally, could gradually be erased. The story told by Maria do Socorro Cardoso Xavier is also a way of preserving the memory of Ipueira, reporting on the social life and historical setting of the place, using family narrative.O livro reúne registros de memórias históricas da família Xavier, da qual a autora é membro,
e traz desde o episódio heróico entre membros da família Xavier e o bando de Lampião, à
uma árvore genealógica dos Xavier e homenagens aos membros dessa famílias, além de
registros fotográficos dos membros conhecidos. A autora resgata e preserva memórias
importantes da família, reconstituindo fatos que, contados oralmente, poderiam se apagar aos
poucos. A história narrada por Maria do Socorro Cardoso Xavier também é uma forma de
preservar a memória de Ipueira, relatando sobre a vida social e cenário histórico do lugar,
utilizando da narrativa familiar
Variations on the Author
No full text“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Duals of linearized Reed-Solomon codes
No full textNous donnons une description des duaux des codes de Reed-Solomon linéarisés en termes de codes obtenus en prenant des résidus de fonctions rationnelles des polynômes de Ore. Notre construction montre en particulier, que sous certaines hypothèses sur le corps de base, la classe des codes de Reed-Solomon linéarisés est stable par dualité. Comme sous-produit de notre travail, nous développons une théorie des résidus dans le cadre des polynômes de Ore, étendant les résultats de l’article A theory of residues for skew rational functions de Xavier Caruso.We give a description of the duals of linearized Reed–Solomon codes in terms of codes obtained by taking residues of Ore rational functions. Our construction shows in particular that, under some assumptions on the base field, the class of linearized Reed–Solomon codes is stable under duality. As a byproduct of our work, we develop a theory of residues in the Ore setting, extending the results of A theory of residues for skew rational functions from Xavier Caruso
Duals of linearized Reed-Solomon codes
No full textNous donnons une description des duaux des codes de Reed-Solomon linéarisés en termes de codes obtenus en prenant des résidus de fonctions rationnelles des polynômes de Ore. Notre construction montre en particulier, que sous certaines hypothèses sur le corps de base, la classe des codes de Reed-Solomon linéarisés est stable par dualité. Comme sous-produit de notre travail, nous développons une théorie des résidus dans le cadre des polynômes de Ore, étendant les résultats de l’article A theory of residues for skew rational functions de Xavier Caruso.We give a description of the duals of linearized Reed–Solomon codes in terms of codes obtained by taking residues of Ore rational functions. Our construction shows in particular that, under some assumptions on the base field, the class of linearized Reed–Solomon codes is stable under duality. As a byproduct of our work, we develop a theory of residues in the Ore setting, extending the results of A theory of residues for skew rational functions from Xavier Caruso
Sir William Collins and Xavier Herbert
No full textSir William Collins, publisher and Xavier Herbert, author. Hand written comment about the photograph by Xavier Herbert on verso. [Gift of David Rowbotham
San Xavier District pedestrian access and safety study : final report
No full textabstract: The San Xavier District of the Tohono O’odham Nation is home to approximately 2,000 people. Numerous others come to the District to visit the San Xavier del Bac Mission Church. The San Xavier District Pedestrian Access and Safety Study is being prepared to improve the walking and bicycling environment on the San Xavier District for Community members and visitors alike. The study is being funded by the Arizona Department of Transportation Multimodal Planning Division’s Planning Assistance for Rural Areas program.Includes bibliographical references
Interview with Xavier Aldana Reyes
No full textXavier Aldana Reyes is Reader in English Literature and Film in Manchester, a founding member of the Manchester Centre for Gothic Studies, and the author of Spanish Gothic: National Identity, Collaboration and Cultural Adaptation (2017) and Gothic Cinema (2019). His publications in Gothic and horror studies include Twenty-First-Century Gothic: An Edinburgh Companion (with Maisha Wester; 2019), Horror: A Literary History (2016) and Digital Horror: Haunted Technologies, Network Panic and the Found Footage Phenomenon (with Linnie Blake; 2015). Aldana Reyes also edited fiction anthologies for the British Library series, Tales of the Weird, including the following titles: The Gothic Tales of H.P. Lovecraft (2018), The Weird Tales of William Hope Hodgson (2019), Promethean Horrors: Classic Tales of Mad Science (2019) and Roarings from Further Out: Four Weird Novellas, by Algernon Blackwood (2019)
On the dimension of certain Kisin varieties : the case of the scalar restriction of GLd
No full textA une représentation de p-torsion du groupe de Galois absolu d'un corps p-adique, M. Kisin associe un espace de modules, appelé par la suite variété de Kisin par G. Pappas et M. Rapoport. Ces variétés ont été introduites afin de démontrer plusieurs résultats de modularité sur les représentations galoisiennes. Elles se sont révélées utiles également pour construire certains anneaux de déformations voire les calculer. Plus récemment elles ont été utilisées pour munir le champ des représentations galoisiennes de torsion d'une structure algébrique. Par ailleurs ces variétés ressemblent formellement aux variétés de Deligne-Lusztig affines. En particulier leur définition s'étend dans le cadre de la théorie des groupes réductifs. Dans cette thèse, nous étudions la dimension de certaines variétés de Kisin dans le cas de la restriction des scalaires à la Weil du groupe linéaire général GLd. En nous basant sur des méthodes issues du cadre Deligne-Lusztig et en suivant les travaux de E. Viehmann et X. Caruso, nous définissons une stratification de la variété de Kisin. Nous encadrons ensuite la dimension des strates, puis étudions le problème de la maximisation de la dimension sur l'ensemble des strates. Cela permet de démontrer des encadrements pour la dimension des variétés de Kisin considérées. Comme dans le cas des variétés de Deligne-Lusztig affines, la somme des racines positives intervient dans l'encadrement de la dimension.Given a p-torsion representation of the absolute Galois group of a p-adic field, M. Kisin defines a moduli space, which was named Kisin variety afterwards by G. Pappas and M. Rapoport. These varieties were first introduced in order to prove several modularity results on Galois representations. They were also used for constructing certain Galois deformation rings and computing some of them. Besides, they were involved in a recent work aiming at defining an algebraic structure on the stack of torsion Galois representations. It turns out that these varieties are formally similar to affine Deligne-Lusztig varieties. In particular their definition extends to the framework of reductive groups. In this thesis, we study the dimension of some Kisin varieties corresponding to the scalar restriction of the general linear group GLd. Inspired by methods coming from Deligne-Lusztig theory and following works by E. Viehmann and X. Caruso, we define a stratification on the given Kisin variety. Then we bound from below and from above the dimension of the strata, and we address the problem of maximizing the dimension over all strata. This allows us to derive the announced bounds on the dimension. As for affine Deligne-Lusztig varieties, the sum of the positive roots appears in the bounds
Xavier Albó: Memoria, Crónica, Perfil
No full textAuthor historicizes the monumental contribution to the study of Quechua of linguist and anthropologist Xavier Albó. Author recalls Albó's early linguistic and anthropological influence during the late 1960s as a clear inspiration to study Quechua linguistics, the largest indigenous language spoken today in the Americas
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