Ara es mostren els items 1-12 de 12

    • A model for non-free circle actions 

      Roig Martí, Agustín; Saralegi-Aranguren, Martintxo (1997)
      Article
      Accés obert
      Let $\Phi: \Bbb S^{1}\times M\longrightarrow M$ be a smooth action of the unit circle $\Bbb S^{1}$ on a manifold $M$. In this work, we compute the minimal model of $M$ in terms of the orbit space $B$ and the fixed point ...
    • Godement resolutions and sheaf homotopy theory 

      Rodríguez González, Beatriz; Roig Martí, Agustín (2014-09)
      Article
      Accés restringit per política de l'editorial
      The Godement cosimplicial resolution is available for a wide range of categories of sheaves. In this paper we investigate under which conditions of the Grothendieck site and the category of coefficients it can be used to ...
    • Homotopy Batalin-Vilkovisky algebras 

      Gálvez Carrillo, Maria Immaculada; Tonks, Andrew; Vallette, Bruno (2011-03-30)
      Altres
      Accés obert
      This paper provides an explicit cofibrant resolution of the operad encoding Batalin-Vilkovisky algebras. Thus it defines the notion of homotopy Batalin-Vilkovisky algebras with the required homotopy properties. To define ...
    • Homotopy Gerstenhaber structures and vertex algebras 

      Gálvez Carrillo, Maria Immaculada; Gorbounov, V.; Tonks, Andrew (2010)
      Article
      Accés obert
      We provide a simple construction of a G∞-algebra structure on an important class of vertex algebras V, which lifts the Gerstenhaber algebra structure on BRST cohomology of V introduced by Lian and Zuckerman. We outline two ...
    • Homotopy linear algebra 

      Gálvez Carrillo, Maria Immaculada; Kock, Joachim; Tonks, Andrew (2016-02)
      Report de recerca
      Accés obert
      By homotopy linear algebra we mean the study of linear functors between slices of the 8-category of 8-groupoids, subject to certain finiteness conditions. After some standard definitions and results, we assemble said slices ...
    • Homotopy linear algebra 

      Gálvez Carrillo, Maria Immaculada; Kock, Joachim; Tonks, Andrew (2018-04)
      Article
      Accés obert
      By homotopy linear algebra we mean the study of linear functors between slices of the 8-category of 8-groupoids, subject to certain finiteness conditions. After some standard definitions and results, we assemble said slices ...
    • Introducció als tipus d'homotopia d'ordre superior a 1: grups d'homotopia de conjunts simplicials 

      Pi Roca, Joana (Universitat Politècnica de Catalunya, 2023-06-20)
      Treball Final de Grau
      Accés obert
      Els grups d'homotopia s'utilitzen en la topologia algebraica per classificar els espais topològics. Mitjançant l'associació de grups amb espais topològics i emprant les valuoses eines de la teoria de grups, enregistren ...
    • Model categories and cubical descent 

      Rubió Pons, Llorenç (2007-06-12)
      Article
      Accés obert
      We prove that the subcategory of fibrant objects of a simplicial model category is a cohomological descent category, in the sense of Guillén and Navarro, if and only if an acyclicity criterion holds.
    • Some remarks on Cartan-Eilenberg categories 

      Pascual Gainza, Pere (2012-05)
      Article
      Accés restringit per política de l'editorial
      In this note we collect some remarks and examples on Cartan–Eilenberg categories.
    • Sparse methods for Online Support Vector Machine 

      Riera Molina, Carles Roger (Universitat Politècnica de Catalunya, 2014-11-28)
      Projecte Final de Màster Oficial
      Accés obert
      Aquest treball proposa un nou classificador online basat en Kernel SVM que minimitza el nombre de vectors de suport gràcies una restricció adicional imposada mitllançant métodes de continuació. Conseqüentment, es pot fer ...
    • The groupoid of finite sets is biinitial in the 2-category of rig categories 

      Elgueta Montó, Josep (2021-11-01)
      Article
      Accés obert
      The groupoid of finite sets has a “canonical” structure of a symmetric 2-rig with the sum and product respectively given by the coproduct and product of sets. This 2-rig ^ FSet is just one of the many non-equivalent ...
    • Up-to-homotopy algebras with strict units 

      Roig Martí, Agustín (2018-12-20)
      Report de recerca
      Accés obert
      We prove the existence of minimal models à la Sullivan for operads with non trivial arity zero. So up-to-homotopy algebras with strict units are just operad algebras over these minimal models. As an application we give ...