Documentos de Trabajo del Departamento de Matemática y Ciencias

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Multilinear H older-type inequalities on Lorentz sequence spaces
(2008-07) Carando, Daniel; Dimant, Verónica; Sevilla-Peris, Pablo
We establish Hölder type inequalities for Lorentz sequence spaces and their duals. In order to achieve these and some related inequalities, we study diagonal multilinear forms in general sequence spaces, and obtain estimates for their norms. We also consider norms of multilinear forms in different Banach multilinear ideals.
Pattern recognition via projection – based k – NN rules
(2008-06) Fraiman, Ricardo; Justel, Ana; Svarc, Marcela
We introduce a new procedure for pattern recognition, based on the concepts of random projections and nearest neighbors. It can be thought as an improvement of the classical nearest neighbors classification rules. Besides the concept of neighbors we introduce the notion of district, a larger set which will be projected. Then we apply one dimensional k-NN methods to the projected data on randomly selected directions. In this way we are able to provide a method with some robustness properties and more accurate to handle high dimensional data. The procedure is also universally consistent. We challenge the method with the Isolet data where we obtain a very high classification score.
The choice of inicial Estimate for Computing MM-Estimates
(2008-04) Svarc, Marcela
We show, using a Monte Carlo study, that MM-estimates with projec- tion estimates as starting point of an iterative weighted least squares algorithm, behave more robustly than MM-estimates starting at an S-estimate and similar Gaussian efficiency. Moreover the former have a robustness behavior close to the P-estimates with an additional advantage: they are asymptotically normal making statistical inference possible.
Growing Directed Networks: Limit in-degree distribution for arbitrary out-degree one
(2007-07) Fraiman, Daniel
A coagulation estimate for inertial particles
(2007-06) Armendáriz, Inés; Norris, James R.
Puff Dynamics in Oocytes: Buffers Regulation
(2006-12) Fraiman, Daniel; Ponce Dawson, Silvina
On the logarithmic derivative of the -determinant operators with boundary
(2006-11) Barraza, Oscar; Sanmartino, Marcela
Selection of variables for cluster analysis and classification rules
(2006-11) Fraiman, Ricardo; Justel, Ana; Svarc, Marcela
Brownian coagulation and a version of Smoluchowski’s equation on the circle
(2006-09) Armendáriz, Inés
Coherent Sequences of Polynomial Ideals on Banach Spaces
(2006-08) Carando, Daniel; Dimant, Verónica; Muro, Santiago
Testing statistical hypothesis on random trees
(2006-08) Busch, Jorge R.; Ferrari, Pablo A.; Flesia, Georgina; Fraiman, Ricardo; Grynberg, Sebastian
Metric geometry of partial isometries in a finite von Neumann algebra
(2006-06) Andruchow, Esteban
The Random Projection Method in Goodness of Fit for Functional Data
(2006-06) Cuesta-Albertos, Juan Antonio; del Barrio, E.; Fraiman, Ricardo; Matrán, C.
A Nonparametric Approach to the Estimation of Lengths and Surface Areas
(2006-03) Cuevas, Antonio; Fraiman, Ricardo; Rodríguez-Casal, Alberto
A Tailor-Made Nonparametric Density Estimate
(2006-02) Carando, Daniel; Fraiman, Ricardo; Groisman, Pablo
Classifying speech sonority functional data using a Projected Kolmogorov-Smirnov approach
(2005-12) Cuesta-Albertos, Juan Antonio; Fraiman, Ricardo; Galves, Antonio; Garcia, Jesús
A Pseudodifferential Regularization Method
(2005-11) Barraza, Oscar; Sanmartino, Marcela; Zuccalli, Marcela
Ideals of Multilinear Forms - a Limit Order Approach
(2005-10) Carando, Daniel; Dimant, Verónica; Sevilla-Peris, Pablo
Extension of Polynomials and John’s Theorem for Symmetric Tensor Products
(2005-06) Carando, Daniel; Dimant, Verónica
On the logarithmic derivative of the -determinant
(2005-04) Barraza, Oscar

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