Dpto. Ingeniería Matemática e Informática - Matematika eta Informatika Ingeniaritza Saila: Envíos recientes
Mostrando ítems 21-40 de 82
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Avoiding the order reduction when solving second-order in time PDEs with Fractional Step Runge–Kutta–Nyström methods
Moreta, M. Jesús; Bujanda Cirauqui, Blanca
; Jorge Ulecia, Juan Carlos (Elsevier, 2016)
Artículo / Artikulua 
We study some of the main features of Fractional Step Runge–Kutta–Nyström methods when they are used to integrate Initial–Boundary Value Problems of second order in time, in combination with a suitable spatial discretization. ... -
High order Nyström methods for transmission problems for Helmholtz equation
Domínguez Baguena, Víctor ; Turc, Catalin (Springer, 2016)
Capítulo de libro / Liburuen kapitulua
We present super-algebraic compatible Nyström discretizations for the four Helmholtz boundary operators of Calderón’s calculus on smooth closed curves in 2D. These discretizations are based on appropriate splitting of the ... -
Scalability approaches for causal multicast: a survey
Juan Marín, Rubén de; Decker, Hendrik; Armendáriz Íñigo, José Enrique ; Bernabéu Aubán, José M.; Muñoz Escoí, Francesc D. (Springer, 2016)
Artículo / Artikulua
Many distributed services need to be scalable: internet search, electronic commerce, e-government... In order to achieve scalability those applications rely on replicated components. Because of the dynamics of growth and ... -
A fully discrete Calderón calculus for the two-dimensional elastic wave equation
Domínguez Baguena, Víctor ; Sánchez Vizuet, Tonatiuh; Sayas, Francisco Javier (Elsevier, 2015)
Artículo / Artikulua
In this paper we present a full discretization of the layer potentials and boundary integral operators for the elastic wave equation on a parametrizable smooth closed curve in the plane. The method can be understood as a ... -
Improved accuracy for time-splitting methods for the numerical solution of parabolic equations
Arrarás Ventura, Andrés ; Portero Egea, Laura (Elsevier, 2015)
Artículo / Artikulua
In this work, we study time-splitting strategies for the numerical approximation of evolutionary reaction–diffusion problems. In particular, we formulate a family of domain decomposition splitting methods that overcomes ... -
Eventual consistency: origin and support
Muñoz Escoí, Francesc D.; García Escrivá, José Ramón; Sendra Roig, Juan Salvador; Bernabéu Aubán, José M.; González de Mendívil Moreno, José Ramón (Slovak Academy of Sciences, Institute of Informatics, 2018)
Artículo / Artikulua
Eventual consistency is demanded nowadays in geo-replicated services that need to be highly scalable and available. According to the CAP constraints, when network partitions may arise, a distributed service should choose ... -
Order barrier for low-storage DIRK methods with positive weights
Higueras Sanz, Inmaculada ; Roldán Marrodán, Teodoro (Springer, 2018)
Artículo / Artikulua
In this paper we study an order barrier for low-storage diagonally implicit Runge-Kutta (DIRK) methods with positive weights. The Butcher matrix for these schemes, that can be implemented with only two memory registers in ... -
An efficient numerical method for singularly perturbed time dependent parabolic 2D convection-diffusion systems
Clavero, Carmelo; Jorge Ulecia, Juan Carlos (Elsevier, 2018)
Artículo / Artikulua
In this paper we deal with solving efficiently 2D linear parabolic singularly perturbed systems of convection–diffusion type. We analyze only the case of a system of two equations where both of them feature the same diffusion ... -
Educational games to enhance museum visits for schools
Bossavit, Benoît ; Pina Calafi, Alfredo ; Sánchez Gil, Isabel ; Urtasun, Aitziber (National Taiwan Normal University, 2018)
Artículo / Artikulua
Museums usually look for new educational tools to enhance their exhibition. The Oteiza's museum in Navarre (Spain) especially gives importance to the dissemination of Jorge Oteiza's work to children at schools. Consequently, ... -
A note on the asymptotic expansion of the Lerch’s transcendent
Cai, Xing Shi; López García, José Luis (Taylor & Francis, 2018)
Artículo / Artikulua
In Ferreira and López [Asymptotic expansions of the Hurwitz–Lerch zeta function. J Math Anal Appl. 2004;298(1):210–224], the authors derived an asymptotic expansion of the Lerch's transcendent Φ(z,s,a) for large |a|, valid ... -
An extension of the multiple Erdélyi-Kober operator and representations of the generalized hypergeometric functions
Karp, D. B.; López García, José Luis (De Gruyter, 2018)
Artículo / Artikulua
In this paper we investigate the extension of the multiple Erd elyi-Kober fractional integral operator of Kiryakova to arbitrary complex values of parameters by the way of regularization. The regularization involves ... -
Convergent asymptotic expansions of Charlier, Laguerre and Jacobi polynomials
López García, José Luis ; Temme, Nico M. (Cambridge University Press, 2004)
Artículo / Artikulua
Convergent expansions are derived for three types of orthogonal polynomials: Charlier, Laguerre and Jacobi. The expansions have asymptotic properties for large values of the degree. The expansions are given in terms of ... -
New asymptotic expansion and error bound for Stirling formula of reciprocal Gamma function
Pagola Martínez, Pedro Jesús (Ele-Math, 2018)
Artículo / Artikulua
Studying the problem about if certain probability measures are determinate by its moments [4, 8, 10] is useful to know the asymptotic behavior of the probability densities for large values of argument. This requires, ... -
Generalization of Zernike polynomials for regular portions of circles and ellipses
Navarro, Rafael; López García, José Luis ; Díaz, José A.; Pérez Sinusía, Ester (Optical Society of America, 2014)
Artículo / Artikulua
Zernike polynomials are commonly used to represent the wavefront phase on circular optical apertures, since they form a complete and orthonormal basis on the unit circle. Here, we present a generalization of this Zernike ... -
Convergent and asymptotic methods for second-order difference equations with a large parameter
Ferreira González, Chelo; López García, José Luis ; Pérez Sinusía, Ester (Springer, 2018)
Artículo / Artikulua
We consider the second-order linear difference equation y(n+2)−2ay(n+1)−Λ2y(n)=g(n)y(n)+f(n)y(n+1) , where Λ is a large complex parameter, a≥0 and g and f are sequences of complex numbers. Two methods are proposed to find ... -
The asymptotic expansion of the swallowtail integral in the highly oscillatory region
Ferreira González, Chelo; López García, José Luis ; Pérez Sinusía, Ester (Elsevier, 2018)
Artículo / Artikulua
The mathematical models of many short wavelength phenomena, specially wave propagation and optical diffraction, contain, as a basic ingredient, oscillatory integrals with several nearly coincident stationary phase or ... -
Uniform convergent expansions of the Gauss hypergeometric function in terms of elementary functions
Ferreira González, Chelo; López García, José Luis ; Pérez Sinusía, Ester (Taylor & Francis, 2018)
Artículo / Artikulua
We consider the hypergeometric function 2F1(a, b; c; z) for z ∈ C \ [1,∞). For Ra ≥ 0, we derive a convergent expansion of 2F1(a, b; c; z) in terms of the function (1 − z)−a and of rational functions of z that is uniformly ... -
Uniform representation of the incomplete beta function in terms of elementary functions
Ferreira González, Chelo; López García, José Luis ; Pérez Sinusía, Ester (Kent State UniversityJohann Radon Institute (RICAM), 2018)
Artículo / Artikulua
We consider the incomplete beta function Bz(a, b) in the maximum domain of analyticity of its three variables: a, b, z ∈ C, −a /∈ N, z /∈ [1, ∞). For <b ≤ 1 we derive a convergent expansion of z−aBz(a, b) in terms of the ... -
Asymptotic and convergent expansions for solutions of third-order linear differential equations with a large parameter
Ferreira González, Chelo; López García, José Luis ; Pérez Sinusía, Ester (Shanghai Normal UniversityWilmington Scientific Publisher, 2018)
Artículo / Artikulua
In previous papers [6–8,10], we derived convergent and asymptotic expansions of solutions of second order linear differential equations with a large parameter. In those papers we generalized and developed special cases not ... -
The use of two-point Taylor expansions in singular one-dimensional boundary value problems I
Ferreira González, Chelo; López García, José Luis ; Pérez Sinusía, Ester (Elsevier, 2018)
Artículo / Artikulua
We consider the second-order linear differential equation (x + 1)y′′ + f(x)y′ + g(x)y = h(x) in the interval (−1, 1) with initial conditions or boundary conditions (Dirichlet, Neumann or mixed Dirichlet-Neumann). The ...
