Exploració per autor "Alberich Carramiñana, Maria"
Ara es mostren els items 11-30 de 32
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Flagged parallel manipulators
Alberich Carramiñana, Maria; Thomas, Federico; Torras, Carme (IEEE, 2007)
Article
Accés obertThe conditions for a parallel manipulator to be flagged can be simply expressed in terms of linear dependencies between the coordinates of its leg attachments, both on the base and on the platform. These dependencies permit ... -
ImaginaryBCN: cuaderno de seguimiento
Alberich Carramiñana, Maria; Buendia Bordera, Jordi; Dachs Cadefau, Ferran; Sabater Montaner, Anna; Sánchez Díaz, Emilio José (2012)
Altres
Accés obertGuia didàctica de l'exposició Imaginary/BCN. La mirada matemàtica, les arts i el patrimoni. Barcelona, del 17 de març al 6 de maig de 2012 -
Monomial generators of complete planar ideals
Alberich Carramiñana, Maria; Álvarez Montaner, Josep; Blanco Fernández, Guillem (2020-01-01)
Article
Accés obertWe provide an algorithm that computes a set of generators for any complete ideal in a smooth complex surface. More interestingly, these generators admit a presentation as monomials in a set of maximal contact elements ... -
Morse cell decomposition and parametrization of surfaces from point clouds
Alberich Carramiñana, Maria; Amorós Torrent, Jaume; Coltraro, Franco; Torras, Carme; Verdaguer López, Miquel (Publicacions de la Universitat Jaume I, 2022)
Text en actes de congrés
Accés obertAn algorithm for the reconstruction of a surface from a point sample is presented. It proceeds directly from the point-cloud to obtain a cellular decomposition of the surface derived from a Morse function. No intermediate ... -
Multiplicities of jumping points for mixed multiplier ideals
Alberich Carramiñana, Maria; Álvarez Montaner, Josep; Dachs Cadefau, Ferran; González Alonso, Víctor (Springer, 2019-01-01)
Article
Accés obertIn this paper we make a systematic study of the multiplicity of the jumping points associated to the mixed multiplier ideals of a family of ideals in a complex surface with rational singularities. In particular we study ... -
Multiplicity and Poincaré series for mixed multiplier ideals
Alberich Carramiñana, Maria; Álvarez Montaner, Josep; Dachs Cadefau, Ferran; González Alonso, Víctor (2018)
Text en actes de congrés
Accés restringit per política de l'editorial -
Multiplicity and Poincaré series for mixed multiplier ideals
Alberich Carramiñana, Maria; Álvarez Montaner, Josep; Dachs Cadefau, Ferran; González Alonso, Víctor (2018-09)
Article
Accés obert -
Multiplier ideals in two-dimensional local rings with rational singularities
Alberich Carramiñana, Maria; Álvarez Montaner, Josep; Dachs Cadefau, Ferran (2016)
Article
Accés restringit per política de l'editorialThe aim of this paper is to study jumping numbers and multiplier ideals of any ideal in a two-dimensional local ring with a rational singularity. In particular we reveal which information encoded in a multiplier ideal ... -
New algebraic conditions for the identification of the relative position of two coplanar ellipses
Alberich Carramiñana, Maria; Elizalde, Borja; Thomas, Federico (2017-05-01)
Article
Accés obertThe identification of the relative position of two real coplanar ellipses can be reduced to the identification of the nature of the singular conics in the pencil they define and, in general, their location with respect to ... -
Of limit key polynomials
Alberich Carramiñana, Maria; Fernández Boix, Albert.; Fernández González, Julio; Guàrdia Rubies, Jordi; Nart Vinyals, Enric; Roé Vellvé, Joaquim (2021-04-01)
Article
Accés obertLet ν be a valuation of arbitrary rank on the polynomial ring K[x] with coefficients in a field K. We prove comparison theorems between MacLane-Vaquié key polynomials for valuations μ ≤ν and abstract key polynomials for ... -
Partially flagged parallel manipulators: singularity charting and avoidance
Alberich Carramiñana, Maria; Garolera, M; Thomas, Federico; Torras, Carme (2009-08)
Article
Accés obertThere are only three 6-SPS parallelmanipulatorswith triangular base and platform, i.e., the octahedral, the flagged, and the partially flagged, which are studied in this paper. The forward kinematics of the octahedralmanipulator ... -
Poicaré series for mixed multiplier ideals
Alberich Carramiñana, Maria; Álvarez Montaner, Josep; Dachs Cadefau, Ferran; González Alonso, Víctor (2018)
Article
Accés obertWe present a generalization of the Poincaré series to the case of mixed multiplier ideals. For that, we will recall some results about how we can compute the jumping walls associated to a mixed multiplier ideal and introduce ... -
Poincare series of multiplier ideals in two-dimensional local rings with rational singularities
Alberich Carramiñana, Maria; Álvarez Montaner, Josep; Dachs Cadefau, Ferran; González Alonso, Víctor (2017-01-02)
Article
Accés obertWe study the multiplicity of the jumping numbers of an mm-primary ideal a in a two-dimensional local ring with a rational singularity. The formula we provide for the multiplicities leads to a very simple and efficient ... -
Quadratic planar differential systems with algebraic limit cycles via quadratic plane Cremona maps
Alberich Carramiñana, Maria; Ferragut Amengual, Antoni Manel; Llibre Saló, Jaume (Elsevier, 2021)
Article
Accés obertIn this paper we study the action of planar birational transformations, also known as plane Cremona maps, on quadratic planar differential systems. We provide geometrical characterizations of when a quadratic system is ... -
Reconstruction of sampled surfaces with boundary via Morse theory
Coltraro, Franco; Amorós Torrent, Jaume; Alberich Carramiñana, Maria; Torras, Carme (European Association for Computer Graphics (Eurographics), 2023)
Text en actes de congrés
Accés obertWe study the perception problem for garments (e.g. a pair of pants) using tools from computational topology: the identification of their geometry and position from point-cloud samples, as obtained e.g. with 3D scanners. ... -
Recovering the epipolar direction from two affine views of a planar object
Alberich Carramiñana, Maria; Alenyà Ribas, Guillem; Andrade-Cetto, Juan; Martinez, Elisa; Torras, Carme (Academic Press, 2008)
Article
Accés obertThe mainstream approach to estimate epipolar geometry from two views requires matching the projections of at least 4 non-coplanar points in the scene, assuming a full projective camera model. Our work deviates from this ... -
The minimal tjurina number of irreducible germs of plane curve singularities
Alberich Carramiñana, Maria; Almirón Cuadros, Patricio; Blanco Fernández, Guillem; Melle Hernández, Alejandro (2021-01-01)
Article
Accés obertIn this paper we give a positive answer to a question of Dimca and Greuel about the quotient between the Milnor and the Tjurina numbers for any irreducible germ of plane curve singularity. This result is based on a closed ... -
The ultrametric space of plane branches
Abío Roig, Ignasi; Alberich Carramiñana, Maria; González Alonso, Víctor (2011)
Article
Accés restringit per política de l'editorialWe study properties of the space of irreducible germs of plane curves (branches), seen as an ultrametric space. We provide various geometrical methods to measure the distance between two branches and to compare distances ... -
The ultrametric space of plane branches
Abío Roig, Ignasi; Alberich Carramiñana, Maria; González Alonso, Víctor (2010-08)
Report de recerca
Accés obertWe study properties of the space of irreducible germs of plane curves (branches), seen as an ultrametric space. We provide various geometrical methods to measure the distance between two branches and to compare distances ... -
Valuations with an infinite limit-depth
Alberich Carramiñana, Maria; Guàrdia Rubies, Jordi; Nart Vinyals, Enric; Roé Vallvé, Joaquim (2023-08-08)
Article
Accés restringit per política de l'editorialWe construct a field K and a valuation-algebraic valuation on K[x] , whose underlying Maclane–Vaquié chain consists of an infinite (countable) number of limit augmentations.