Listar Artículos (Álgebra) por fecha de publicación
Mostrando ítems 21-40 de 260
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Gröbner δ-bases and Gröbner bases for differential operators
(Polish Academy of Sciences, Institute of Mathematics, 2002)This paper deals with the notion of Gr¨obner δ-base for some rings of linear differential operators by adapting the works ...
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Free divisors and duality for D-modules
(Pleiades, 2002)The relationship between D-modules and free divisors has been studied in a general setting by L. Narváez and F.J. Calderón. ...
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Logarithmic cohomology of the complement of a plane curve
(Springer, 2002-03)Let D, x be a plane curve germ. We prove that the complex Ω•(log D)x computes the cohomology of the complement of D, x ...
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Specializations of MacMahon symmetric functions and the polynomial algebra
(Elsevier, 2002-03-06)A MacMahon symmetric function is a formal power series in a finite number of alphabets that is invariant under the diagonal ...
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Ordering pure braid groups on compact, connected surfaces
(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 bi-orderable.
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Constructions in R[x_1, ..., x_n]. Applications to K-Theory
(2002-06-25)A classical result in K-Theory about polynomial rings like the Quillen-Suslin theorem admits an algorithmic approach when ...
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Computing the rational torsion of an elliptic curve using Tate normal form
(Elsevier, 2002-09)It is a classical result (apparently due to Tate) that all elliptic curves with a torsion point of order n (4 ≤ n ≤ 10, ...
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The module Dfs for locally quasi-homogeneous free divisors
(Springer, 2002-10)We find explicit free resolutions for the D-modules Dfs and D[s]fs/D[s]f s+1, where f is a reduced equation of a locally ...
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A combinatorial overview of the Hopf algebra of MacMahon symmetric functions
(Springer, 2002-11)A MacMahon symmetric function is a formal power series in a finite number of alphabets that is invariant under the diagonal ...
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Explicit models for perverse sheaves
(European Mathematical Society, 2003)We consider categories of generalized perverse sheaves, with relaxed constructibility conditions, by means of the process ...
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Computation of centralizers in braid groups and Garside groups
(Consejo Superior de Investigaciones Científicas, 2003)We give a new method to compute the centralizer of an element in Artin braid groups and, more generally, in Garside groups. ...
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Los números de (Euler)-Catalan
(Asociación Matemática Venezolana, 2003) -
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Minimal resolutions of lattice ideals and integer linear programming
(European Mathematical Society, 2003)A combinatorial description of the minimal free resolution of a lattice ideal allows us to the connection of Integer ...
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La labor docente del profesor de matemáticas
(Sociedad Española de Matemática Aplicada, 2003) -
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Sumando la derivada de la serie geométrica
(Asociación Matemática Venezolana, 2003) -
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Some geometric aspects of Puiseux surfaces
(European Mathematical Society, 2003)The following problem is treated: Characterizing the tangent cone and the equimultiple locus of a Puiseux surface (that ...
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Conservation of the noetherianity by perfect transcendental field extensions
(European Mathematical Society, 2003)Let k be a perfect field of characteristic p>0, k(t)per the perfect closure of k(t) and A a k-algebra. We characterize whether the ring A⊗kk(t)per is noetherian when A is the ring of formal power series in n indeterminates over k.
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Valuations in fields of power series
(European Mathematical Society, 2003)This paper deals with valuations of fields of formal meromorphic functions and their residue fields. We explicitly describe ...
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Hasse-Schmidt derivations and coefficient fields in positive characteristics
(Elsevier, 2003-07-01)We show how to express any Hasse-Schmidt derivation of an algebra in terms of a finite number of them under natural ...
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Monomial discrete valuations in k[[X]]
(Cornell University, 2003-07-17)Let v be a rank m discrete valuation of k[[X1,...,Xn]] with dimension n-m. We prove that there exists an inmediate extension L of K where the valuation is monomial. Therefore we compute explicitly the residue field of the valuation.