Matemàtiques i Informàtica: Envíos recientes
Mostrando ítems 221-240 de 1007
Expected Riesz Energy of Some Determinantal Processes on Flat Tori
We compute the expected Riesz energy of random points on flat tori drawn from certain translation invariant determinantal processes and de- termine the process in the family providing the optimal asymptotic expected Riesz energy.
A family of local rings with rational Poincare series
In this note we compute the Poincaré series of almost stretched Gorenstein local rings. It turns out that it is rational.
A fully automatic method for vascular tortuosity feature extraction in the supra-aortic region: unraveling possibilities in stroke treatment planning
Vascular tortuosity of supra-aortic vessels is widely considered one of the main reasons for failure and delays in endovascular treatment of large vessel occlusion in patients with acute ischemic stroke. Characterization ...
A la recerca de pi
El problema de la uniformització de corbes fou estudiat a bastament per B. Riemann (1826-1866), F. Klein (1849-1925), H. Poincaré (1854-1912) i P. Koebe (1882-1945). En les primeres dècades del segle xx, aquests autors ...
Les sèries de Newton
Des que Descartes a la Geométrie(1637) introdueix la diferència entre corbes geomètriques i corbes mecàniques, essent les primeres aquelles que poden expressar-se per mitjà d'equacions purament algèbriques, fins que Euler ...
Weak convergence to a class of two-parameter Gaussian processes from a Lévy sheet
In this paper, we show an approximation in law, in the space of the continuous functions on $[0,1]^2$, of two-parameter Gaussian processes that can be represented as a Wiener type integral by processes constructed from ...
Fourier Transform and Prym varieties
Let $P$ be the Prym variety attached to an unramified double covering $\tilde{C} \rightarrow C$. Let $X=X(\tilde{\boldsymbol{C}}, C)$ be the variety of special divisors which birationally parametrizes the theta divisor in ...
Using normal forms to study Oterma's transition in the Planar RTBP
Comet 39P/Oterma is known to make fast transitions between heliocentric orbits outside and inside the orbit of Jupiter. In this note the dynamics of Oterma is quantitatively studied via an explicit computation of high order ...
Cardiac magnetic resonance radiomics: basic principles and clinical perspectives
Radiomics is a novel image analysis technique, whereby voxel-level information is extracted from digital images and used to derive multiple numerical quantifiers of shape and tissue character. Cardiac magnetic resonance ...
Harmonic measure and uniform densities
We study two problems concerning harmonic measure on certain 'champagne subdomains' of the unit disk $\D$. The domains that we consider are obtained by removing from $\D$ little disks around sequences of points with a ...
Nonlinear transport equations and quasiconformal maps
We prove existence of solutions to a nonlinear transport equation in the plane,for which the velocity field is obtained as the convolution ofthe classical Cauchy kernel with theunknown. Even though the initial datum is ...
On Stability of Logarithmic Tangent Sheaves: Symmetric and Generic Determinants
We prove stability of logarithmic tangent sheaves of singular hypersurfaces $D$ of the projective space with constraints on the dimension and degree of the singularities of $D$. As the main application, we prove that ...
Social network extraction and analysis based on multimodal dyadic interaction
Social interactions are a very important component in people"s lives. Social network analysis has become a common technique used to model and quantify the properties of social interactions. In this paper, we propose an ...
Characterization of quantum entanglement via a hypercube of Segre embeddings
A particularly simple description of separability of quantum states arises naturally in the setting of complex algebraic geometry, via the Segre embedding. This is a map describing how to take products of projective Hilbert ...
Topological features of multivariate distributions: Dependency on the covariance matrix
Topological data analysis provides a new perspective on many problems in the domain of complex systems. Here, we establish the dependency of mean values of functional $p$ norms of 'persistence landscapes' on a uniform ...
Risk mitigation in algorithmic accountability: The role of machine learning copies
Machine learning plays an increasingly important role in our society and economy and is already having an impact on our daily life in many different ways. From several perspectives, machine learning is seen as the new ...
Effective Training and Inference Strategies for Point Classification in LiDAR Scenes
Light Detection and Ranging systems serve as robust tools for creating three-dimensional representations of the Earth’s surface. These representations are known as point clouds. Point cloud scene segmentation is essential ...
Implementació tècnica d'una eina 'clica i escolta' al Moodle: prova pilot a la Universitat de Barcelona
L'article exposa la implementació tècnica del ReadSpeaker, una eina que converteix el text a veu, al Campus Virtual de la Universitat de Barcelona. Aquesta implementació s'ha dut a terme exclusivament des d'una plantilla ...
Organisational adaptation of multi-agent systems in a peer-to-peer scenario
Organisations in Multi-Agent Systems (MAS) have proven to be successful in regulating agent societies. Nevertheless, changes in agents' behaviour or in the dynamics of the environment may lead to a poor fulfilment of the ...
