220 research outputs found

    Adjoint Brascamp-Lieb inequalities

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    The Brascamp-Lieb inequalities are a generalization of the H\"older, Loomis-Whitney, Young, and Finner inequalities that have found many applications in harmonic analysis and elsewhere. In this paper we introduce an "adjoint" version of these inequalities, which can be viewed as an LpL^p version of the entropy Brascamp-Lieb inequalities of Carlen and Cordero-Erausquin. As applications, we reprove a log-convexity property of the Gowers uniformity norms, and establish some reverse LpL^p inequalities for various tomographic transforms. We conclude with some open questions.Comment: 43 pages; some further references and remarks adde

    Adjoint Brascamp–Lieb inequalities

    No full text
    The Brascamp-Lieb inequalities are a generalization of the Hölder, Loomis-Whitney, Young, and Finner inequalities that have found many applications in harmonic analysis and elsewhere. In this paper we introduce an "adjoint" version of these inequalities, which can be viewed as an Lp version of the entropy Brascamp-Lieb inequalities of Carlen and Cordero-Erausquin. As applications, we reprove a log-convexity property of the Gowers uniformity norms, and establish some reverse Lp inequalities for various tomographic transforms. We conclude with some open questions

    Fourier duality in the Brascamp-Lieb inequality

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    It was observed recently in work of Bez, Buschenhenke, Cowling, Flock and the first author, that the euclidean Brascamp-Lieb inequality satisfies a natural and useful Fourier duality property. The purpose of this paper is to establish an appropriate discrete analogue of this. Our main result identifies the Brascamp-Lieb constants on (finitely-generated) discrete abelian groups with Brascamp-Lieb constants on their (Pontryagin) duals. As will become apparent, the natural setting for this duality principle is that of locally compact abelian groups, and this raises basic questions about Brascamp-Lieb constants formulated in this generality

    De origine animae humanae

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    quam annuente Deo ... sub praesidio ... Ioh. Henrici Heideggeri placido eruditorum examini subiicit Hermannus Liebius Episcopicellanus, author & respondens, ad diem Septembris, loco horísque solitisDiss. Hohe Schule Zürich, 167

    Finite bounds for Hölder-Brascamp-Lieb multilinear inequalities

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    A criterion is established for the validity of multilinear inequalities of a class considered by Brascamp and Lieb, generalizing well-known inequalties of Hölder, Young, and Loomis-Whitney. The proof relies on interpolation, linear algebra, and Hölder’s inequality

    Finite Bounds for Holder-Brascamp-Lieb Multilinear Inequalities

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    A criterion is established for the validity of multilinear inequalities of a class considered by Brascamp and Lieb, generalizing well-known inequalties of Rogers and Holder, Young, and Loomis-Whitney

    The Brascamp–Lieb inequalities: recent developments

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    summary:We discuss recent progress on issues surrounding the Brascamp–Lieb inequalities

    Towards a general theory of word formation: the Process Model

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    Foreword. The present essay—longer than a paper but shorter than a book—characterizes the Process Model of Word Formation that represents a new approach to word formation intermediate between constructionist and generative approaches; the model will be elaborated in detail in: Lieb, Hans-Heinrich (in prep.), The Process Model of Word Formation and Inflection. Amsterdam/Philadelphia: Benjamins. The essay, which is independent of the book, replaces an earlier, unpublished manuscript (Lieb 2011/2012), of which it is a completely revised and enlarged version. The essay was completed in July 2013; it is an outcome of work undertaken by the author since roughly 2006 but originating from still earlier work (first presented at a Research Colloquium held at the Freie Universität Berlin in 2001, and subsequently by a lecture read at the Annual Meeting of the Deutsche Gesellschaft für Sprachwissenschaft in 2006: Lieb 2006). The present text is an Open Access publication by the Freie Universität Berlin; it is free for downloading, but all rights remain with the author (in particular, revamping of the text or its commercial use are prohibited; quotation only with indication of the source). The Freie Universität Berlin also houses a major effort at producing book- length Open Access publications in linguistics, organized into series: Language Science Press, langsci-press.org. The present essay does not fit this framework, both for lack of a suitable series and for being shorter than a book. An Open Access format was chosen for the essay by its author for a number of reasons, most importantly, to provoke discussion (contact the author via: [email protected]). Please quote this essay as follows, together with its url: Lieb, Hans-Heinrich. 2013. Towards a general theory of word formation: the Process Model. Berlin: Freie Universität Berlin. (An Open Access publication.) The author is Full Professor (em.) of General and German Linguistics at the Freie Universität Berlin in Berlin, Germany. Berlin, July 2013 Hans-Heinrich LiebForeword. The present essay—longer than a paper but shorter than a book—characterizes the Process Model of Word Formation that represents a new approach to word formation intermediate between constructionist and generative approaches; the model will be elaborated in detail in: Lieb, Hans-Heinrich (in prep.), The Process Model of Word Formation and Inflection. Amsterdam/Philadelphia: Benjamins. The essay, which is independent of the book, replaces an earlier, unpublished manuscript (Lieb 2011/2012), of which it is a completely revised and enlarged version. The essay was completed in July 2013; it is an outcome of work undertaken by the author since roughly 2006 but originating from still earlier work (first presented at a Research Colloquium held at the Freie Universität Berlin in 2001, and subsequently by a lecture read at the Annual Meeting of the Deutsche Gesellschaft für Sprachwissenschaft in 2006: Lieb 2006). The present text is an Open Access publication by the Freie Universität Berlin; it is free for downloading, but all rights remain with the author (in particular, revamping of the text or its commercial use are prohibited; quotation only with indication of the source). The Freie Universität Berlin also houses a major effort at producing book- length Open Access publications in linguistics, organized into series: Language Science Press, langsci-press.org. The present essay does not fit this framework, both for lack of a suitable series and for being shorter than a book. An Open Access format was chosen for the essay by its author for a number of reasons, most importantly, to provoke discussion (contact the author via: [email protected]). Please quote this essay as follows, together with its url: Lieb, Hans-Heinrich. 2013. Towards a general theory of word formation: the Process Model. Berlin: Freie Universität Berlin. (An Open Access publication.) The author is Full Professor (em.) of General and German Linguistics at the Freie Universität Berlin in Berlin, Germany. Berlin, July 2013 Hans-Heinrich Lie

    Loomis–Whitney inequalities on corank 1 Carnot groups

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    In this paper we provide another way to deduce the Loomis–Whitney inequality on higher dimensional Heisenberg groups based on the one on the first Heisenberg group and the known nonlinear Loomis–Whitney inequality (which has more projections than ours). Moreover, we generalize the result to the case of corank 1 Carnot groups and products of such groups. Our main tool is the modified equivalence between the Brascamp–Lieb inequality and the subadditivity of the entropy developed in Carlen and Cordero-Erausquin (2009)
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