Browsing by Subject "Anàlisi funcional"

Now showing items 1-14 of 14

    • A lower bound for the size of a Minkowski sum of dilates 

      Hamidoune, Yahya Ould; Rué Perna, Juan José (2011-03-01)
      Article
      Open Access
      Let A be a finite non-empty set of integers. An asymptotic estimate of the size of the sum of several dilates was obtained by Bukh. The unique known exact bound concerns the sum |A + k·A|, where k is a prime and |A| is ...

    • A note on the application of integrals involving cyclic products of kernels 

      Buldygin, Valery V.; Utzet, Frederic; Zaiats, Vladimir (Institut d'Estadística de Catalunya, 2002)
      Article
      Open Access
      In statistics of stochastic processes and random fields, a moment function or a cumulant of an estimate of either the correlation function or the spectral function can often contain an integral involving a cyclic product ...

    • Análisis de datos funcionales : implementación y aplicaciones 

      Navarro Pérez, Valentí (Universitat Politècnica de Catalunya, 2004-07)
      Master thesis (pre-Bologna period)
      Open Access
      El objetivo de este proyecto ha sido el de hacer posible un análisis de datos funcionales, , descriptivo y de componentes principales funcionales. Es decir: ·Comprender la bibliografia y la teoría del análisis de datos ...

    • Archetypal analysis for ordinal data 

      Fernández Martínez, Daniel; Epifanio, Irene; McMillan, Louise (2021-11)
      Article
      Open Access
      Archetypoid analysis (ADA) is an exploratory approach that explains a set of continuous observations as mixtures of pure (extreme) patterns. Those patterns (archetypoids) are actual observations of the sample which makes ...

    • Identification des besoins actuels et formalisation d’une méthodologie de cotation fonctionnelle 

      Branchat Freixa, Elisabet (Universitat Politècnica de Catalunya / École Nationale Supérieure d’Arts et Métiers, 2008)
      Master thesis (pre-Bologna period)
      Restricted access - confidentiality agreement

    • On interpolation and sampling in Hilbert spaces of analytic functions 

      Berndtsson, Bo; Ortega Cerdà, Joaquim (1995)
      Article
      Open Access
      In this paper we give new proofs of some theorems due to Seip, Seip-Wallsten and Lyubarskii-Seip on sequences of interpolation and sampling for spaces of analytic functions that are square integrable with respect to ...

    • On Normal Forms and Splitting of Separatrices in Reversible Systems 

      Lázaro Ochoa, José Tomás (Universitat Politècnica de Catalunya, 2003-10-23)
      Doctoral thesis
      Open Access
      És difícil dibuixar una frontera, dins la Teoria de Sistemas Dinàmics, entre lleis de conservació i simetries doncs, sovint, les seves característiques es confonen. Un clar exemple d'aquest fenómen el constitueixen els ...

    • Reflexivity in precompact groups and extensions 

      Galindo Pastor, Jorge; Tkachenko, Mikhail; Bruguera Padró, Maria Montserrat; Hernandez, Constancio (2014-02-15)
      Article
      Restricted access - publisher's policy
      We establish some general principles and find some counter-examples concerning the Pontryagin reflexivity of precompact groups and P-groups. We prove in particular that:; (1) A precompact Abelian group G of bounded order ...

    • Stabilization with rates in fast diffusion and weighted Sobolev inequalities 

      Vázquez, Juan Luís (2007-06-18)
      Audiovisual
      Open Access
      Conferència presentada dins el marc de la GLOBAL School on PDEs: layers and dislocations (Barcelona, UPC, 18-22 juny 2007).

    • Tame systems of linear and semilinear mappings and representation-tame biquivers 

      Klymchuk, Tetiana (2016-02-26)
      Article
      Open Access
      We study systems of linear and semilinear mappings considering them as representations of a directed graph G with full and dashed arrows: a representation of G is given by assigning to each vertex a complex vector space, ...

    • Transformación digital en el área de Cognitive 

      Giménez Martínez, Javier (Universitat Politècnica de Catalunya, 2019-01)
      Bachelor thesis
      Restricted access - confidentiality agreement

    • Una manera fàcil de reportar taules estadístiques amb R 

      Pecharroman Ravella, Emilio (Universitat Politècnica de Catalunya, 2023-01)
      Master thesis
      Open Access
      Para cualquier estudio o ensayo clínico siempre es crucial realizar un resumen de los datos comparando entre 2 o más grupos. Para más inri, la mayoría de los investigadores independientes no suelen tener un gran conocimiento ...

    • Wildfires vegetation recovery through satellite remote sensing and functional data analysis 

      Serra Burriel, Feliu; Delicado Useros, Pedro Francisco; Cucchietti, Fernando (Multidisciplinary Digital Publishing Institute (MDPI), 2021-06-07)
      Article
      Open Access
      In recent years, wildfires have caused havoc across the world, which are especially aggravated in certain regions due to climate change. Remote sensing has become a powerful tool for monitoring fires, as well as for measuring ...

    • Wildness of the problems of classifying two-dimensional spaces of commuting linear operators and certain Lie algebras 

      Futorny, Vyacheslav; Klymchuk, Tetiana; Petravchukc, Anatolii P.; Sergeichuk, Vladimir V. (Elsevier, 2018-01-01)
      Article
      Open Access
      For each two-dimensional vector space V of commuting n×n matrices over a field F with at least 3 elements, we denote by V˜ the vector space of all (n+1)×(n+1) matrices of the form [A¿00] with A¿V. We prove the wildness of ...