Ara es mostren els items 42-61 de 83

    • La funció Z de Riemann 

      Quer Bosor, Jordi (2007-09-19)
      Audiovisual
      Accés obert
      El novembre de 1859 Riemann envià un manuscrit de sis fulls a l’Acadèmia de Berlín titulat Sobre el nombre de primers menors que una quantitat donada, el qual seria l’única publicació dedicada a la teoria de nombres de ...
    • La mitjana aritmètico-geomètrica de Gauss 

      Pascual Mellado, Roger (Universitat Politècnica de Catalunya, 2021-07)
      Treball Final de Grau
      Accés obert
      La mitjana aritmètico-geomètrica de Gauss (MAG) neix com a eina per calcular numèricament integrals el·líptiques. Aquesta successió apareix per primer cop en notes de Lagrange, però va ser Gauss qui va descobrir realment ...
    • Large graphs of diameter two and given degree 

      Širáň, Jozef; Siagiová, Jana; Ždímalová, Mária (Iniciativa Digital Politècnica, 2011)
      Text en actes de congrés
      Accés obert
      Let r(d, 2), C(d, 2), and AC(d, 2) be the largest order of a regular graph, a Cayley graph, and a Cayley graph of an Abelian group, respectively, of diameter 2 and degree d. The best currently known lower bounds on these ...
    • Mock modular forms 

      Tomàs i Salamaña, Andreu (Universitat Politècnica de Catalunya, 2019-07)
      Treball Final de Grau
      Accés obert
      En aquest treball estudiem la recent teoria de les formes modulars de mock i en veiem algunes aplicacions.
    • Modular curves and complex multiplication 

      Hernández Barrios, Víctor (Universitat Politècnica de Catalunya, 2018-07)
      Projecte Final de Màster Oficial
      Accés obert
      In this project we explore the connections between elliptic curves, modular curves and complex multiplication (CM). The main theorem of CM shows that the theory of CM for elliptic curves provides an explicit construction ...
    • Modular symbols 

      Gispert Sánchez, Francesc-Xavier (Universitat Politècnica de Catalunya, 2016-05)
      Treball Final de Grau
      Accés obert
      Modular forms are holomorphic functions defined on the complex upper half-plane which transform in a certain way under the action of a group of matrices. Alternatively, they can be thought of as differential forms on a ...
    • New results on metric-locating-dominating sets of graphs 

      Hernando Martín, María del Carmen; Mora Giné, Mercè; González, Antonio (2016-04-13)
      Report de recerca
      Accés obert
      A dominating set S of a graph is a metric-locating-dominating set if each vertex of the graph is uniquely distinguished by its distanc es from the elements of S , and the minimum cardinality of such a set is called the ...
    • No anul·lació de funcions L en valors crítics i resultats d'equidistribució en aritmètica 

      Arazo Marín, David (Universitat Politècnica de Catalunya, 2009-10)
      Projecte Final de Màster Oficial
      Accés obert
      L'objectiu del treball és revisar els principals resultats d'equidistribució en aritmètica. En primer terme es presenten i demostren el Teorema de densitat de Dirichlet i el Teorema de densitat de Chebotarev. La part central ...
    • Numerical differentiation for local and global tangent operators in computational plasticity 

      Pérez Foguet, Agustí; Rodríguez Ferran, Antonio; Huerta, Antonio (2000)
      Article
      Accés obert
      In this paper, numerical di¿erentiation is applied to integrate plastic constitutive laws and to compute the corresponding consistent tangent operators. The derivatives of the constitutive equations are approximated by ...
    • On a question of Sárkozy and Sós for bilinear forms 

      Cilleruelo, Javier; Rué Perna, Juan José (2009-02-02)
      Article
      Accés restringit per política de l'editorial
      We prove that if 2 ≤ k1 ≤ k2, then there is no infinite sequence $\emph{A}$ of positive integers such that the representation function r(n)=#{(a, a'): n=$k{_1}a$ + $k{_2}a'$, a,a' ∊ $\emph{A}$} is constant for n large ...
    • On elliptic Galois representations and genus-zero modular units 

      Fernández González, Julio; Lario Loyo, Joan Carles (2006-07-03)
      Article
      Accés obert
      Given an odd prime \,$p$\, and a representation $\varrho$\, of the absolute Galois group of a number field $k$ onto $\mathrm{PGL}_2(\mathbb{F}_p)$ with cyclotomic determinant, the moduli space of elliptic curves defined ...
    • On monochromatic solutions of equations in groups 

      Cameron, Peter J.; Cilleruelo, Javier; Serra Albó, Oriol (2006-01-12)
      Article
      Accés obert
      Resum no disponible
    • On PGZ decoding of alternant codes 

      Farré Cirera, Rafael; Sayols Baixeras, Narcís; Xambó Descamps, Sebastián (2019-03-01)
      Article
      Accés obert
      In this paper, we first review the classical Petterson–Gorenstein–Zierler decoding algorithm for the class of alternant codes, which includes Reed–Solomon, Bose–Chaudhuri–Hocquenghem and classical Goppa codes. Afterwards, ...
    • On some classes of irreducible polynomials 

      Gutiérrez Gutiérrez, Jaime; Jiménez Urroz, Jorge (2020-07)
      Article
      Accés obert
      One of the fundamental tasks of Symbolic Computation is the factorization of polynomials into irreducible factors. The aim of the paper is to produce new families of irreducible polynomials, generalizing previous results ...
    • On the complexity of barrier resilience for fat regions and bounded ply 

      Korman, Matias; Löffler, Maarten; Silveira, Rodrigo Ignacio; Strash, Darren (2018-06)
      Article
      Accés obert
      In the barrier resilience problem (introduced by Kumar et al., Wireless Networks 2007), we are given a collection of regions of the plane, acting as obstacles, and we would like to remove the minimum number of regions so ...
    • On the p-th division polynomial 

      González Rovira, Josep (2022-04)
      Article
      Accés obert
      By using the relations between supersingular elliptic curves defined over a finite field of characteristic p > 3 and the p-th division polynomial, we present a property about the reduction modulo a prime p > 3 of the p-th ...
    • Orders of CM elliptic curves modulo p with at most two primes 

      Iwaniec, Henryk; Jiménez Urroz, Jorge (2006)
      Article
      Accés obert
      We prove the analog of Koblitz conjecture when replacing primes by almost prime numbers and considering elliptic curves with complex multiplication. In other words for infinitely many primes $p$, (given in a quantitative ...
    • Overconvergent Eichler-Shimura isomorphisms for quaternionic modular forms over Q 

      Barrera Salazar, Daniel Roberto; Gao, Shan (2017-11-01)
      Article
      Accés obert
      In this work we construct overconvergent Eichler-Shimura isomorphisms over Shimura curves over Q. More precisely, for a prime p > 3 and a wide open disk U in the weight space, we construct a Hecke-Galois-equivariant morphism ...
    • p-adic families of d-th Shintani liftings 

      Casazza, Daniele; Vera Piquero, Carlos de (2019-12-11)
      Report de recerca
      Accés obert
      In this note we give a detailed construction of a Lambda-adic d-th Shintani lifting. We derive a p-adic version of Kohnen's formula relating Fourier coefficients of half-integral weight modular forms and special values of ...
    • p-adic L-functions and Euler systems 

      Velasco Falguera, Oriol (Universitat Politècnica de Catalunya, 2022-07)
      Projecte Final de Màster Oficial
      Accés obert
      p-adic L-functions are variants of the classical L-functions, with a p-adic domain instead of the complex numbers. There are 2 ways to construct p-adic L-functions. The first one is purely analytic, by interpolation of the ...