Exploració per tema "Àrees temàtiques de la UPC::Matemàtiques i estadística::Àlgebra"
Ara es mostren els items 1-20 de 244
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A BRILS metaheuristic for non-smooth flow-shop problems with failure-risk costs
(2016-02-01)
Article
Accés obertThis paper analyzes a realistic variant of the Permutation Flow-Shop Problem (PFSP) by considering a non-smooth objective function that takes into account not only the traditional makespan cost but also failure-risk costs ... -
A canonical realization of the Weyl BMS symmetry
(Elsevier, 2020-12-10)
Article
Accés obert -
A description of auto-fixed subgroups in a free group
(2004-06)
Article
Accés obertLet F be a finitely generated free group. By using Bestvina-Handel theory, as well as some further improvements, the eigengroups of a given automorphism of F (and its fixed subgroup among them) are globally analyzed and ... -
A general method to obtain the spectrum and local spectra of a graph from its regular partitions
(2020-07-12)
Article
Accés obertIt is well known that, in general, part of the spectrum of a graph can be obtained from the adjacency matrix of its quotient graph given by a regular partition. In this paper, a method that gives all the spectrum, and also ... -
A geometric approach to dense Cayley digraphs of finite Abelian groups
(Elsevier, 2016)
Text en actes de congrés
Accés obertWe give a method for constructing infinite families of dense (or eventually likely dense) Cayley digraphs of finite Abelian groups. The diameter of the digraphs is obtained by means of the related {\em minimum distance ... -
A new computational approach to ideal theory in number fields
(2013)
Article
Accés obertLet K be the number field determined by a monic irreducible polynomial f(x) with integer coefficients. In previous papers we parameterized the prime ideals of K in terms of certain invariants attached to Newton polygons ... -
A note on a new general family of deterministic hierarchical networks
(2019-06-01)
Article
Accés obertHierarchical network; Small-word; Scale-free; Routing algorithm; Diameter; Clustering -
A short account of Leonardo Torres' endless spindle
(2008)
Article
Accés restringit per política de l'editorialAt the end of the 19th century, several analog machines had been proposed for solving algebraic equations. These machines – based not only on kinematics principles but also on dynamic or hydrostatic balances, electric or ... -
Absolute type shaft encoding using LFSR sequences with prescribed length
(2006-02)
Article
Accés obertMaximal-length binary sequences have been known for a long time. They have many interesting properties, one of them is that when taken in blocks of n consecutive positions they form 2 n ° 1 diÆerent codes in a ... -
Absolute-type shaft encoding using LFSR sequences with a prescribed length
(2008-03-31)
Article
Accés obertMaximal-length binary sequences have existed for a long time. They have many interesting properties, and one of them is that, when taken in blocks of n consecutive positions, they form 2n - 1 different codes in a closed ... -
Accuracy of ionospheric models used in GNSS and SBAS: methodology and analysis
(2016-03-01)
Article
Accés restringit per acord de confidencialitat© 2015, Springer-Verlag Berlin Heidelberg. The characterization of the accuracy of ionospheric models currently used in global navigation satellite systems (GNSSs) is a long-standing issue. The characterization remains a ... -
Algebraic PGD for tensor separation and compression: an algorithmic approach
(2018-07)
Article
Accés obertProper Generalized Decomposition (PGD) is devised as a computational method to solve high-dimensional boundary value problems (where many dimensions are associated with the space of parameters defining the problem). The ... -
Algorithmic problems for free-abelian times free groups
(2013-10-01)
Article
Accés obertWe study direct products of free-abelian and free groups with special emphasis on algorithmic problems. After giving natural extensions of standard notions into that family, we find an explicit expression for an arbitrary ... -
Algunas cuestiones sobre vectores y tensiones
(E.T.S.A.B, 1970)
Llibre
Accés obert -
An algebraic model for the storage of data in parallel memories
(Springer, 1989)
Capítol de llibre
Accés obertThe use of SIMD computers requires efficient schemes of storage of data in order to have conflict-free acces in parallel computation. In this paper we restate the problem of finding such chemes in an algebraic context. ... -
An alternative procedure to obtain the mortality rate with non-linear functions: Application to the case of the Spanish population
(Public Library of Science (PLOS), 2019-10-15)
Article
Accés obertThis paper presents an alternative calculation procedure to calculate the mortality rate, exploiting the data available in the Eurostat demography database for Spain. This methodology has been devised based on two of the ... -
Analizing exact controllability of l-order linear systems
(WSEAS Press, 2017-01-01)
Article
Accés obertIn recent years there has been growing interest in the descriptive analysis of l-order time invariant linear dynamical system xl = Al-1xl-1 ++ A0x0 where Ai are square complex matrices and xi denotes the i-th derivative ... -
Anticyclotomic p-adic L-functions and the exceptional zero phenomenon
(2019-08-15)
Article
Accés obertLet A be a modular elliptic curve over a totally real field F, and let E/F be a totally imaginary quadratic extension. In the event of exceptional zero phenomenon, we prove a formula for the derivative of the multivariable ... -
Aproximació històrica i heurística al teorema fonamental de l’algebra
(2006-03-15)
Audiovisual
Accés obertDesprés de fer un recorregut ràpid per la història de les raons que van portar a l’acceptació dels nombres complexos —un problema d’existència—, veurem l'impuls que el càlcul integral i diferencial van donar a la necessitat ... -
Automorphism group of split Cartan modular curves
(2016-08-01)
Article
Accés obert
