Matemàtiques i Informàtica: Recent submissions
Now showing items 241-260 of 1007
El transport paral.lel: de Levi-Civita als nostres dies
En aquesta conferència tractarem d'una de les idees fonamentals de la geometria diferencial moderna com és el transport paral·lel en una varietat diferenciable, però per raons tant de simplicitat com, sobretot, d'intentar ...
Weighted BMO and Hankel operators between weighted Bergman spaces
We introduce a family of weighted BMO spaces in the Bergman metric on the unit ball of $\Bbb{C}^n$ and use them to characterize complex functions $f$ such that the big Hankel operators $H_f$ and $H\overline{_f}$ are both ...
On the Iitaka Fibration of Varieties of Maximal Albanese Dimension
We prove that the tetracanonical map of a variety $X$ of maximal Albanese dimension induces the Iitaka fibration. Moreover, if $X$ is of general type, then the tricanonical map is birational.
A study on the role of radiomics feature stability in predicting breast cancer subtypes
Imaging features (radiomics) have potential for predicting Triple Negative Breast Cancer and other subtypes using magnetic resonance images (MRI). This work uses 244 images from the Duke-Breast-Cancer-MRI dataset to ...
Accesses to infinity from Fatou components.
We study the boundary behaviour of a meromorphic map $f\mathbb{C} \rightarrow \widehat{C}$ on its invariant simply connected Fatou component $U$. To this aim, we develop the theory of accesses to boundary points of $U$ and ...
Holomorphic 1-forms on some coverings of the Moduli space of curves
In this paper, we consider unramified coverings of the moduli space $\mathcal{M}_g$ of smooth projective complex curves of genus $g$. Under some hypothesis on the branch locus of the finite extended map to the Deligne-Mumford ...
Mixed Hodge structures and formality of symmetric monoidal functors
We use mixed Hodge theory to show that the functor of singular chains with rational coefficients is formal as a lax symmetric monoidal functor, when restricted to complex varieties whose weight filtration in cohomology ...
Cuasianaliticidad en espacios generales de funciones diferenciables
En (3) se ha introducido, para cada espacio de sucesiones lambda, una clase de funciones diferenciables, designada por E lambda (A), formada por las funciones f infinitamente diferenciables en A (subconjunto de Rn) tales que
Criteria for hitting probabilities with applications to systems of stochastic wave equations
We develop several results on hitting probabilities of random fields which highlight the role of the dimension of the parameter space. This yields upper and lower bounds in terms of Hausdorff measure and Bessel-Riesz ...
Algebraic properties of the Lefschetz zeta function, periodic points and topological entropy
The Lefschetz zeta function associated to a continuous self-map f of a compact manifold is a rational function P/Q. According to the parity of the degrees of the polinomials P and Q, we analize when the set of periodic ...
Lógica y gramática en Richard Montague
Incluso en las latitudes más despistadas en cuanto a investigación en teoría lingüística se refiere, pocos serán los que no hayan oído hablar de NOAM CHOMSKY y SU puñado (o legión) de colaboradores del famoso ...
On the Xiao conjecture for plane curves
Let f:S⟶B be a non-trivial fibration from a complex projective smooth surface S to a smooth curve B of genus b. Let cf the Clifford index of the general fibre F of f. In Barja et al. (Journal für die reine und angewandte ...
¿Son accesibles los gráficos estadísticos para personas con baja visión en la prensa digital?: una propuesta metodológica basada en heurísticas
Se presenta un nuevo conjunto de indicadores heurísticos para la evaluación de la accesibilidad de los gráficos estadísticos para personas con baja visión y visión cromática deficiente (VCD), así como un método para su ...
CatLC: Catalonia Multiresolution Land Cover Dataset
The availability of large annotated image datasets represented one of the tipping points in the progress of object recognition in the realm of natural images, but other important visual spaces are still lacking this asset. ...
A quaternionic construction of p-adic singular moduli
Rigid meromorphic cocycles were introduced by Darmon and Vonk as a conjectural $p$-adic extension of the theory of singular moduli to real quadratic base fields. They are certain cohomology classes of $\mathrm{SL}_2(\mathbb{Z}[1 ...
An automorphic approach to Darmon points
We give archimedean and non-archimedean constructions of Darmon points on modular abelian varieties attached to automorphic forms over arbitrary number fields and possibly non-trivial central character. An effort is made ...
Machine and deep learning for longitudinal biomedical data: a review of methods and applications
Exploiting existing longitudinal data cohorts can bring enormous benefits to the medical field, as many diseases have a complex and multi-factorial time-course, and start to develop long before symptoms appear. With the ...
The concept of k-level for positive integers
It is said (cf . [4]) that a positive integer n satisfies property (N) if there exists a representation of n as a sum of 3 squares, n = x1+x2+x3 , with (x 1 ,n) = 1 and x~ < n31 . It has been checked that every positive ...
The Dirichlet problem for nonlocal elliptic operators with $C^\alpha$ exterior data
In this note we study the boundary regularity of solutions to nonlocal Dirichlet problems of the form $L u=0$ in $\Omega$, $u=g$ in $\mathbb{R}^{N} \backslash \Omega$, in non-smooth domains $\Omega$. When $g$ is smooth ...
On the zero sets of bounded holomorphic functions in the bidisc
In this work we prove in a constructive way a theorem of Rudin which says that if $E$ is an analytic subset of the bidisc $D^2$ (with multiplicities) which does not intersect a neighbourhood of the distinguished boundary, ...
