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Mostrando ítems 71-80 de 109
Artículo
On the dimension of discrete valuations of k ((X1, ..., Xn))
(Elsevier, 2001-07-01)
Let v be a rank-one discrete valuation of the field Kn=k((X1,…,Xn)). We know, after [1], that if n=2 then the dimension of v is 1 and if v is the usual order function over k((X1,…,Xn)) its dimension is n−1. In this paper ...
Artículo
A flatness property for filtered D-modules
(European Mathematical Society, 2007)
Let M be a coherent module over the ring DX of linear differential operators on an analytic manifold X and let Z1, · · · , Zk be k germs of transverse hypersurfaces at a point x ∈ X. The Malgrange-Kashiwara V-filtrations ...
Artículo
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 is, an algebroid embedded surface admitting an equation whose roots are Puiseux power series), using ...
Capítulo de Libro
Sudokus and Gröbner Bases: not only a Divertimento
(2006)
Sudoku is a logic-based placement puzzle. We recall how to translate this puzzle into a 9-colouring problem which is equivalent to a (big) algebraic system of polynomial equations. We study how far Gröbner bases techniques ...
Artículo
Symmetric functions in noncommuting variables
(American Mathematical Society, 2006)
Consider the algebra Qhhx1, x2, . . .ii of formal power series in countably many noncommuting variables over the rationals. The subalgebra Π(x1, x2, . . .) of symmetric functions in noncommuting variables consists of all ...
Tesis Doctoral
Álgebra y combinatoria de las singularidades
(2001)
La memoria titulada Algebra y Combinatoria de las Singularidades, dirigida por el Profesor José Luis Vicente Córdoba, contiene los resultados de una profunda reflexión sobre el papel de ciertos objetos combinatorios, así ...
Tesis Doctoral
Derivaciones de Hasse-Schmidt, cuerpos de coeficientes y extensión de escalares en característica positiva
(2002-03-08)
Una de las diferencias más notables entre el Álgebra de característica positiva y el Álgebra de característica cero radica en el comportamiento respecto de los métodos, operaciones y estructuras diferenciales. Por ejemplo, ...
Artículo
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 product of the irreducible representations of the symmetric group corresponding to the partitions ...
Artículo
On the singular braid monoid of an orientable surface
(American Mathematical Society, 2004)
In this paper we show that the singular braid monoid of an orientable surface can be embedded in a group. The proof is purely topological, making no use of the monoid presentation.
Artículo
Smash products for secondary homotopy groups
(Springer, 2008-10)
We construct a smash product operation on secondary homotopy groups yielding the structure of a lax symmetric monoidal functor. Applications on cup-one products, Toda brackets and Whitehead products are considered.