Listar Artículos (Álgebra) por título
Mostrando ítems 228-247 de 260
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The computation of the logarithmic cohomology for plane curves
(Elsevier, 2009-12-01)We will give algorithms of computing bases of logarithmic cohomology groups for square-free polynomials in two variables.
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The conjugacy stability problem for parabolic subgroups in artin groups
(Springer, 2022-09-14)Given an Artin group A and a parabolic subgroup P, we study if every two elements of P that are conjugate in A, are also ...
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The conservation relation for cuspidal representations
(Springer, 2012-01)Let π ∈ Cusp (U(Vn)) be a smooth cuspidal irreducible representation of a unitary group U(Vn) of dimension n over a ...
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The cyclic sliding operation in Garside groups
(Springer, 2010-05)We present a new operation to be performed on elements in a Garside group, called cyclic sliding, which is introduced to ...
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The defining ideals of conjugacy classes of nilpotent matrices and a conjecture of Weyman
(Oxford University Press, 2008)Tanisaki introduced generating sets for the defining ideals of the schematic intersections of the closure of conjugacy ...
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The Gröbner fan of an An-module
(Elsevier, 2000-06-14)Let I be a non-zero left ideal of the Weyl algebra An of order n over a field k and let L:R2n→R be a linear form defined ...
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The Kronecker product of Schur functions indexed by two-row shapes or hook shapes
(Springer, 2001-09)The Kronecker product of two Schur functions sµ and sν, denoted by sµ ∗ sν, is the Frobenius characteristic of the tensor ...
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The local duality theorem in D-module theory
(Société Mathématique de France, 2004)These notes are devoted to the Local Duality Theorem for D-modules, which asserts that the topological Grothendieck-Verdier ...
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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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The Newton Procedure for several variables
(Elsevier, 2011-07-15)Let us consider an equation of the form P(x, z) = zm + w1(x)zm−1 + · · · + wm−1(x)z + wm(x) = 0, where m>1, n>1, x=(x1⋯xn) ...
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The nth root of a braid is unique up to conjugacy
(Mathematical Sciences Publishers, 2003-11-01)We prove a conjecture due to Makanin: if α and β are elements of the Artin braid group Bn such that α k = β k for some nonzero integer k, then α and β are conjugate. The proof involves the Nielsen-Thurston classification of braids.
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The regularity of a toric variety
(Elsevier, 2001-03-01)We give a method for computing the degrees of the minimal syzygies of a toric variety by means of combinatorial techniques. ...
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The root extraction problem for generic braids
(MDPI, 2019-10)We show that, generically, finding the k-th root of a braid is very fast. More precisely, we provide an algorithm which, ...
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The stability of the Kronecker products of Schur functions
(Elsevier, 2011-04-01)In the late 1930’s Murnaghan discovered the existence of a stabilization phenomenon for the Kronecker product of Schur ...
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The symmetric action on secondary homotopy groups
(The Belgian Mathematical Society, 2008-11)We show that the symmetric track groups Sym(n), which are extensions of the symmetric groups Sym(n) associated to the second Stiefel-Whitney class, act as crossed modules on the secondary homotopy groups of a pointed space.
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Thue equations and torsion groups of elliptic curves
(Elsevier, 2009-02)A new characterization of rational torsion subgroups of elliptic curves is found, for points of order greater than 4, through the existence of solution for systems of Thue equations.
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Toda brackets and cup-one squares for ring spectra
(Taylor & Francis, 2009)In this paper we prove the laws of Toda brackets on the homotopy groups of a connective ring spectrum and the laws of the cup-one square in the homotopy groups of a commutative connective ring spectrum.
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Torsion homology and cellular approximation
(Mathematical Sciences Publishers, 2019-02-06)We describe the role of the Schur multiplier in the structure of the p-torsion of discrete groups. More concretely, we ...
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Torsion of rational elliptic curves over cubic fields
(Rocky Mountain Mathematics Consortium, 2016)Let E be an elliptic curve defined over Q. We study the relationship between the torsion subgroup E(Q)tors and the torsion ...
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Torsion of rational elliptic curves over quadratic fields
(Springer, 2014-09)Let E be an elliptic curve defined over Q. We study the relationship between the torsion subgroup E(Q)tors and the torsion subgroup E(K)tors, where K is a quadratic number field.