891 research outputs found

    Les xarxes revolucionen la comunicació

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    Sastres del vent: la veleria catalana al segle XX

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    Los límites del derecho de cita e ilustración con fines educativos o de investigación científica

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    Estudio realizado en el marco del Proyecto de investigación DER2013-43967-R, sobre “Propiedad intelectual en las Universidades públicas: Titularidad, gestión y transferencia”, financiado por el Ministerio de Economía y Competitividad (MINECO

    Sastres del vent : la veleria catalana al segle XX

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    La fabricació de veles a Catalunya ha estat una feina en equip de mestres velers, cosidors i cosidores, ralingadors, acabadors i aprenents

    Approximation theory for weighted Sobolev spaces on curves

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    17 pages, no figures.-- MSC2000 codes: 41A10, 46E35, 46G10.MR#: MR1882649 (2003c:42002)In this paper we present a definition of weighted Sobolev spaces on curves and find general conditions under which the spaces are complete. We also prove the density of the polynomials in these spaces for non-closed compact curves and, finally, we find conditions under which the multiplication operator is bounded on the completion of polynomials. These results have applications to the study of zeroes and asymptotics of Sobolev orthogonal polynomials.Research of V. Álvarez, D. Pestana and J.M. Rodríguez partially supported by a grant from DGI, BFM2000-0206-C04-01, Spain.Publicad

    Generalized weighted Sobolev spaces and applications to Sobolev orthogonal polynomials, I

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    36 pages, no figures.-- MSC2000 codes: 41A10, 46E35, 46G10.-- Part II of this paper published in: Approx. Theory Appl. 18(2): 1-32 (2002), available at: http://e-archivo.uc3m.es/handle/10016/6483MR#: MR2047389 (2005k:42062)Zbl#: Zbl 1081.42024In this paper we present a definition of Sobolev spaces with respect to general measures, prove some useful technical results, some of them generalizations of classical results with Lebesgue measure and find general conditions under which these spaces are complete. These results have important consequences in approximation theory. We also find conditions under which the evaluation operator is bounded.Research by first (J.M.R.), third (E.R.) and fourth (D.P.) authors was partially supported by a grant from DGI (BFM 2000-0206-C04-01), Spain.Publicad

    Generalized weighted Sobolev spaces and applications to Sobolev orthogonal polynomials, II

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    32 pages, no figures.-- MSC1987 codes: 41A10, 46E35, 46G10.-- Part I of this paper published in: Acta Appl. Math. 80(3): 273-308 (2004), available at: http://e-archivo.uc3m.es/handle/10016/6482MR#: MR1928169 (2003h:42034)Zbl#: Zbl 1095.42014^aWe present a definition of general Sobolev spaces with respect to arbitrary measures, Wk,p(Ω,μ)W^{k,p}(\Omega,\mu) for 1p1\leq p\leq\infty. In Part I [Acta Appl. Math. 80(3): 273-308 (2004), http://e-archivo.uc3m.es/handle/10016/6482] we proved that these spaces are complete under very mild conditions. Now we prove that if we consider certain general types of measures, then Cc(R)C^\infty_c({\bf R}) is dense in these spaces. As an application to Sobolev orthogonal polynomials, we study the boundedness of the multiplication operator. This gives an estimation of the zeroes of Sobolev orthogonal polynomials.Research partially supported by a grant from DGES (MEC), Spain.Publicad

    Weighted Sobolev spaces on curves

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    45 pages, no figures.-- MSC1987 codes: 41A10, 46E35, 46G10.MR#: MR1934626 (2003j:46038)Zbl#: Zbl 1019.46026In this paper we present a definition of weighted Sobolev spaces on curves and find general conditions under which the spaces are complete for non-closed compact curves. We also prove the density of the polynomials in these spaces and, finally, we find conditions under which the multiplication operator is bounded in the space of polynomials.Research of second (D.P.), third (J.M.R.) and fourth (E.R.) authors was partially supported by a grant from DGI (BFM 2000-0206-C04-01), Spain.Publicad

    Étude contrastive de deux traductions espagnoles d'un traité chirurgical français de la première moitié du XIXe siècle

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    In the first half of the 19th century a lot of translations of French medical works were published in Spain. In our paper we will present a contrastive study of the two Spanish versions of the Traité des bandages (1839) by Pierre Nicolas Gerdy. The first was carried out by Francisco Madero the same year, and the second by Francisco Santana and José Rodrigo six years later, in 1845. The aim of this study is to bring to light the traductological differences between these two texts and to analyze them according to the different readers
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