Now showing items 143-162 of 209

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      On the ubiquity of trivial torsion on elliptic curves  [Article]

      González Jiménez, Enrique; Tornero Sánchez, José María (Springer, 2010-08)
      The purpose of this paper is to give a down-to-earth proof of the well–known fact that a randomly chosen elliptic curve over the rationals is most likely to have trivial torsion.
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      On the unit of a monoidal model category  [Article]

      Muro Jiménez, Fernando (Elsevier, 2015-08-15)
      In this paper we show how to modify cofibrations in a monoidal model category so that the tensor unit becomes cofibrant while keeping the same weak equivalences. We obtain aplications to enriched categories and coloured ...
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      Ordering pure braid groups on compact, connected surfaces  [Article]

      González-Meneses López, Juan (University of California, 2002-04)
      We prove that the pure braid groups on compact, connected, orientable surfaces are bi-orderable, and that the pure braid groups on compact, connected non-orientable surfaces have generalized torsion, thus they are not ...
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      Pierre Deligne  [Article]

      Rojas León, Antonio (Real Sociedad Matemática Española, 2013)
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      Pilar Pisón Casares, in memoriam  [Article]

      Ojeda Martínez de Castilla, Ignacio; Piedra Sánchez, Ramón (Real Sociedad Matematica Española, 2007)
      Estamos habituados a describir objetos matemáticos, a elaborar teorías, conjeturar resultados, demostrar asertos o refutar hipótesis, pero no a escribir de una persona, más aún si con ella tenemos vínculos afectivos que ...
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      Polynomial braid combing  [Article]

      Flores Díaz, Ramón Jesús; González-Meneses López, Juan (Oxford University Press, 2018)
      We prove that, for n ≥ 3, the minimal dimension of a model of the classifying space of the braid group Bn, and of the pure braid group Pn, with respect to the family of virtually cyclic groups is n.
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      Presentations for the monoids of singular braids on closed surfaces  [Article]

      González-Meneses López, Juan (Taylor & Francis, 2002)
      We give presentations, in terms of generators and relations, for the monoids SBn(M) of singular braids on closed surfaces. The proof of the validity of these presentations can also be applied to verify, in a new way, the ...
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      Primer Encuentro Conjunto RSME-UMA, Buenos Aires, 11 a 15 de diciembre de 2017  [Article]

      Narváez Macarro, Luis; Villamayor Uriburu, Orlando (Real Sociedad Matemática Española, 2018)
      En la semana del lunes 11 al viernes 15 de diciembre de 2017 se llevó a cabo en Buenos Aires el Primer Encuentro Conjunto entre la Unión Matemática Argentina (UMA) y la RSME. Se celebraba el centenario de la primera ...
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      Purity of exponential sums on An  [Article]

      Rojas León, Antonio (Kluwer, 2006-03)
      We give a purity result for two kinds of exponential sums of the type ∑x∈knψ(f(x)), where k is a finite field of characteristic p and ψ:k→C⋆ is a non-trivial additive character. In the first case, f∈k[x1,…,xn] is a polynomial ...
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      Purity of exponential sums on An, II  [Article]

      Rojas León, Antonio (De Gruyer, 2007-03)
      We give a purity result for exponential sums of the type P x∈kn ψ(f(x)), where k is a finite field of characteristic p, ψ : k → C* is a non-trivial additive character and f ∈ k[x1, . . . , xn] is a polynomial whose highest ...
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      Rank one discrete valuations of power series fields  [Article]

      Herrera Govantes, Francisco Javier; Olalla Acosta, Miguel Ángel; Vicente Córdoba, José Luis (Taylor & Francis, 2007)
      In this paper we study rank one discrete valuations of the field k((X1, . . . , Xn)) whose center in k[[X1, . . . , Xn]] is the maximal ideal. In sections 2 to 6 we give a construction of a system of parametric equations ...
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      Rationality of trace and norm L-functions  [Article]

      Rojas León, Antonio (Duke University Press, 2012-06-15)
      For a given l-adic sheaf F on a commutative algebraic group G over a finite field k and an integer r ≥ 1 we define the r-th local norm Lfunction of F at a point t ∈ G(k) and prove its rationality. This function ...
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      Rectangular symmetries for coefficients of symmetric functions  [Article]

      Briand, Emmanuel; Orellana, Rosa C.; Rosas Celis, Mercedes Helena (American Mathematical Society, 2015)
      We show that some of the main structural constants for symmetric functions (Littlewood-Richardson coefficients, Kronecker coefficients, plethysm coefficients, and the Kostka–Foulkes polynomials) share symmetries related ...
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      Reduced Kronecker coefficients and counter-examples to Mulmuley's strong saturation conjecture SH  [Article]

      Briand, Emmanuel; Orellana, Rosa C.; Rosas Celis, Mercedes Helena (Springer, 2009-12)
      We provide counter–examples to Mulmuley’s strong saturation conjecture (strong SH) for the Kronecker coefficients. This conjecture was proposed in the setting of Geometric Complexity Theory to show that deciding whether ...
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      Reducible braids and Garside theory  [Article]

      González-Meneses López, Juan; Wiest, Bert (Geometry & Topology Publications, 2011)
      We show that reducible braids which are, in a Garside-theoretical sense, as simple as possible within their conjugacy class, are also as simple as possible in a geometric sense. More precisely, if a braid belongs to a ...
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      Representation theory of some infinite-dimensional algebras arising in continuously controlled algebra and topology  [Article]

      Muro Jiménez, Fernando (Springer, 2004)
      In this paper we determine the representation type of some algebras of infinite matrices continuously controlled at infinity by a compact metrizable space. We explicitly classify their finitely presented modules in the ...
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      Représentations banales de GLm(D)  [Article]

      Mínguez Espallargas, Alberto (Foundation Compositio Mathematica, 2013)
      Let F be a non-Archimedean locally compact field of residue characteristic p, let D be a finite dimensional central division F-algebra and let R be an algebraically closed field of characteristic different from p. We define ...
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      Représentations lisses modulo ℓ de GLm(D)  [Article]

      Mínguez Espallargas, Alberto; Sécherre, Vincent (Duke University Press, 2014-03-15)
      Soit F un corps localement compact non archimédien de caractéristique résiduelle p, soit D une algèbre à division centrale de dimension finie sur F et soit R un corps algébriquement clos de caractéristique différente de ...
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      Resolutions of De Concini-Procesi ideals of hooks  [Article]

      Biagioli, Riccardo; Faridi, Sara; Rosas Celis, Mercedes Helena (Taylor & Francis, 2007)
      We find a minimal generating set for the defining ideal of the schematic intersection of the set of diagonal matrices with the closure of the conjugacy class of a nilpotent matrix indexed by a hook partition. The structure ...
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      Restriction of hypergeometric D-modules with respect to coordinate subspaces  [Article]

      Fernández Fernández, María Cruz; Walther, Uli (American Mathematical Society, 2011)
      We compute the restriction of an A-hypergeometric D-module with respect to a coordinate subspace under certain genericity conditions on the parameter.