Enviaments recents

  • Report on the EGNSS competition after Y1 

    Sanz Subirana, Jaume; Juan Zornoza, José Miguel; Alonso Alonso, María Teresa (2016-06-08)
    Report de recerca
    Accés restringit per decisió de l'autor
  • Decomposition spaces in combinatorics 

    Gálvez Carrillo, Maria Immaculada; Kock, Joachim; Tonks, Andrew (2016-12)
    Report de recerca
    Accés obert
    A decomposition space (also called unital 2-Segal space) is a simplicial object satisfying an exactness condition weaker than the Segal condition: just as the Segal condition expresses (up to homotopy) composition, the new ...
  • Three Hopf algebras and their common simplicial and categorical background 

    Gálvez Carrillo, Maria Immaculada; Kaufmann, Ralph L.; Tonks, Andrew (2016-07)
    Report de recerca
    Accés obert
    We consider three a priori totally different setups for Hopf algebras from number theory, mathematical physics and algebraic topology. These are the Hopf algebras of Goncharov for multiple zeta values, that of Connes--Kreimer ...
  • Measuring satisfaction in societies with opinion leaders and mediators 

    Molinero Albareda, Xavier; Riquelme Csori, F.; Serna Iglesias, María José (2016-05-14)
    Report de recerca
    Accés obert
    An opinion leader-follower model (OLF) is a two-action collective decision-making model for societies, in which three kinds of actors are considered:
  • Sullivan minimal models of operad algebras 

    Roig Martí, Agustín; Cirici, Joana (2016-12-12)
    Report de recerca
    Accés obert
    We prove the existence of Sullivan minimal models of operad algebras, for a quite wide family of operads in the category of complexes of vector spaces over a field of characteristic zero. Our construction is an adaptation ...
  • On (non-)exponential decay in generalized thermoelasticity with two temperatures 

    Leseduarte Milán, María Carme; Quintanilla de Latorre, Ramón; Racke, Reinhard (2016-11)
    Report de recerca
    Accés obert
    We study solutions for the one-dimensional problem of the Green-Lindsay and the Lord-Shulman theories with two temperatures. First, existence and uniqueness of weakly regular solutions are obtained. Second, we prove the ...
  • Connected and internal graph searching 

    Barrière Figueroa, Eulalia; Fraigniaud, Pierre; Santoro, Nicola; Thilikos Touloupas, Dimitrios (2002-07)
    Report de recerca
    Accés obert
    This paper is concerned with the graph searching game. The search number es(G) of a graph G is the smallest number of searchers required to clear G. A search strategy is monotone (m) if no recontamination ever occurs. It ...
  • Unranking of combinatorial structures 

    Molinero Albareda, Xavier (1997-07)
    Report de recerca
    Accés obert
    The present work is a study of the deterministic generation of combinatorial structures. We generate classes of combinatorial structures formally specifiable by grammars involving unlabelled sequence, unlabelled set, ...
  • The Plogi and ACi-1 operators on the polynomial time hierarchy 

    Castro Rabal, Jorge; Seara Ojea, Carlos (1993-11)
    Report de recerca
    Accés obert
    In a previous paper ([CS-92]) we studied the agreement of operators P_{log^i} and AC^{i-1} acting on NP. In this article we extend this work to other classes of the polynomial time hierarchy. We show that on Sigma_k^p, ...
  • Generic algorithms for the generation of combinatorial objects 

    Molinero Albareda, Xavier; Martínez Parra, Conrado (2003-06)
    Report de recerca
    Accés obert
    This report briefly describes our generic approach to the exhaustive generation of unlabelled and labelled combinatorial classes. Our algorithms receive a size n and a finite description of a combinatorial class A using ...

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