Results for "A. Sevilla"

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A class of Hamilton-Jacobi equations on Banach-Finsler manifoldsJul 10 2014Dec 02 2014The concept of subdifferentiability is studied in the context of $C^1$ Finsler manifolds (modeled on a Banach space with a Lipschitz $C^1$ bump function). A class of Hamilton-Jacobi equations defined on $C^1$ Finsler manifolds is studied and several results ... More
Dynamical complexity as a proxy for the network degree distributionJul 25 2018Sep 13 2018We explore the relation between the topological relevance of a node in a complex network and the individual dynamics it exhibits. When the system is weakly coupled, the effect of the coupling strength against the dynamical complexity of the nodes is found ... More
Temporal stability of free liquid threads with surface viscoelasticityMay 14 2018Jun 12 2019We analyse the effect of surface viscoelasticity on the temporal stability of a free cylindrical liquid jet coated with insoluble surfactant, extending the results of Timmermans & Lister (J. Fluid Mech., vol. 459, 2002, pp. 289-306). Our development requires, ... More
Discontinuous Galerkin approximations in computational mechanics: hybridization, exact geometry and degree adaptivityAug 19 2019Discontinuous Galerkin (DG) discretizations with exact representation of the geometry and local polynomial degree adaptivity are revisited. Hybridization techniques are employed to reduce the computational cost of DG approximations and devise the hybridizable ... More
Implications of Quantum Computing for Artificial Intelligence alignment researchAug 19 2019Aug 24 2019We explain some key features of quantum computing via three heuristics and apply them to argue that a deep understanding of quantum computing is unlikely to be helpful to address current bottlenecks in Artificial Intelligence Alignment. Our argument relies ... More
HDG-NEFEM with degree adaptivity for Stokes flowsJan 20 2018The NURBS-enhanced finite element method (NEFEM) combined with a hybridisable discontinuous Galerkin (HDG) approach is presented for the first time. The proposed technique completely eliminates the uncertainty induced by a polynomial approximation of ... More
Temporal stability of free liquid threads with surface viscoelasticityMay 14 2018We analyse the effect of surface viscoelasticity on the temporal stability of a free cylindrical liquid jet coated with insoluble surfactant, extending the results of Timmermans & Lister (J. Fluid Mech., vol. 459, 2002, pp. 289-306). Our development requires, ... More
Two-dimensional active motionMay 17 2019The diffusion in two dimensions of non-interacting active particles that follow an arbitrary motility pattern is considered for analysis. Accordingly, the transport equation is generalized to take into account an arbitrary distribution of scattered angles ... More
Constraints on Supersymmetric Flavour Models from b->s gammaJan 02 2008May 15 2008We consider the effects of departures from minimal flavour violations (MFV) in the context of CMSSM-like theories. Second and third generation off-diagonal elements in the Yukawa, sfermion, and trilinear mass matrices are taken to be non-zero at the GUT ... More
Active Particles Moving in Two-Dimensional Space with Constant Speed: Revisiting the Telegrapher's EquationMay 02 2014Starting from a Langevin description of active particles that move with constant speed in infinite two-dimensional space and its corresponding Fokker-Planck equation, we develop a systematic method that allows us to obtain the coarse-grained probability ... More
DNF - Galaxy photometric redshift by Directional Neighbourhood FittingNov 24 2015May 10 2016Wide field images taken in several photometric bands allow simultaneous measurement of redshifts for thousands of galaxies. A variety of algorithms to make this measurement have appeared in the last few years, the majority of which can be classified as ... More
Start-up flow in shallow deformable microchannelsFeb 19 2019Microfluidic systems are usually fabricated with soft materials that deform due to the fluid stresses. The prediction and control of fluid flow inside these channels thus requires solving fluid-structure interaction problems. Recent experimental and theoretical ... More
The nonlinear states of viscous capillary jets confined in the axial directionFeb 23 2018We report an experimental and theoretical study of the global stability and nonlinear dynamics of vertical jets of viscous liquid confined in the axial direction due to their impact on a bath of the same liquid. Previous works demonstrated that in the ... More
A locking-free face-centred finite volume (FCFV) method for linear elasticityJun 19 2018A face-centred finite volume (FCFV) method is proposed for the linear elasticity equation. The FCFV is a mixed hybrid formulation, featuring a system of first-order equations, that defines the unknowns on the faces (edges in two dimensions) of the mesh ... More
Parametric solutions involving geometry integrated with computer-aided designFeb 25 2019The main objective of this work is to describe a general and original approach for computing an off-line solution for a set of parameters describing the geometry of the domain. That is, a solution able to include information for different geometrical ... More
Natural break-up and satellite formation regimes of surfactant-laden liquid threadsMar 07 2019We report a numerical analysis of the unforced break-up of free cylindrical threads of viscous Newtonian liquid whose interface is coated with insoluble surfactants, focusing on the formation of satellite droplets. The initial conditions are harmonic ... More
Stokes theory of thin-film ruptureJun 11 2019The structure of the flow induced by the van der Waals destabilization of a non-wetting liquid film placed on a solid substrate is unraveled by means of theory and numerical simulations of the Stokes equations. Our analysis reveals that lubrication theory, ... More
Natural break-up and satellite formation regimes of surfactant-laden liquid threadsMar 07 2019Jul 27 2019We report a numerical analysis of the unforced break-up of free cylindrical threads of viscous Newtonian liquid whose interface is coated with insoluble surfactants, focusing on the formation of satellite droplets. The initial conditions are harmonic ... More
Hausdorff-Young type inequalities for vector-valued Dirichlet seriesMar 29 2019Jul 18 2019We study Hausdorff-Young type inequalities for vector-valued Dirichlet series which allow to compare the norm of a Dirichlet series in the Hardy space $\mathcal{H}_{p} (X)$ with the $q$-norm of its coefficients. In order to obtain inequalities completely ... More
Dark and baryonic matter in the MareNostrum UniverseOct 20 2006Oct 21 2006We report some results from one of the largest hydrodynamical cosmological simulations of large scale structures that has been done up to date. The MareNostrum Universe SPH simulation consists of 2 billion particles (2 times 1024^3) in a cubic box of ... More
Boson gas in a periodic array of tubesDec 15 2011We report the thermodynamic properties of an ideal boson gas confined in an infinite periodic array of channels modeled by two, mutually perpendicular, Kronig-Penney delta-potentials. The particle's motion is hindered in the x-y directions, allowing tunneling ... More
Global instability of low-density jetsMay 10 2017The global stability of laminar axisymmetric low-density jets is investigated in the low Mach number approximation. The linear modal dynamics is found to be characterised by two features: a stable arc branch of eigenmodes and an isolated eigenmode. Both ... More
Composition operators on weighted spaces of holomorphic functions on $JB^{\ast}-$triplesMay 25 2018We characterise continuity of composition operators on weighted spaces of holomorphic functions $H_{v}(B_{X})$, where $B_{X}$ is the open unit ball of a Banach space which is homogeneous, that is, a $JB^{\ast}-$triple.
Linear and quadratic temperature dependence of electronic specific heat for cupratesJan 09 2013We model cuprate superconductors as an infinite layered lattice structure which contains a fluid of paired and unpaired fermions. Paired fermions, which are the superconducting carriers, are considered as noninteracting zero spin bosons with a linear ... More
Specific heat of underdoped cuprate superconductors from a phenomenological layered Boson-Fermion modelJan 07 2016We adapt the Boson-Fermion superconductivity model to include layered systems such as underdoped cuprate superconductors. These systems are represented by an infinite layered structure containing a mixture of paired and unpaired fermions. The former, ... More
Towards NNLO accuracy for $\varepsilon'/\varepsilon$Nov 24 2016The quantity $\varepsilon'/\varepsilon$ measures direct CP violation in Kaon decays. Recent SM predictions show a $2.9\sigma$ tension with data, with the theoretical uncertainty dominating. As rapid progress on the lattice is bringing nonperturbative ... More
Characterization of a Banach-Finsler manifold in terms of the algebras of smooth functionsAug 26 2011In this note we give sufficient conditions to ensure that the weak Finsler structure of a complete $C^k$ Finsler manifold $M$ is determined by the normed algebra $C_b^k(M)$ of all real-valued, bounded and $C^k$ smooth functions with bounded derivative ... More
A Sneutrino NLSP in the $ν$CMSSMFeb 15 2009Mar 21 2009We extend the constrained minimal supersymmetric model (CMSSM) by adding a right-handed neutrino superfield ($\nu$CMSSM) which decouples close to the GUT scale. We study the effects of a right-handed neutrino on the low energy spectrum and focus on the ... More
A super--convergent hybridisable discontinuous Galerkin method for linear elasticityFeb 06 2018The first super-convergent hybridisable discontinuous Galerkin (HDG) method for linear elastic problems capable of using the same degree of approximation for both the primal and mixed variables is presented. The key feature of the method is the strong ... More
Bayesian regression of piecewise homogeneous Poisson processesFeb 17 2017In this paper, a Bayesian method for piecewise regression is adapted to handle counting processes data distributed as Poisson. A numerical code in Mathematica is developed and tested analyzing simulated data. The resulting method is valuable for detecting ... More
Optical Flow with Semantic Segmentation and Localized LayersMar 12 2016Apr 11 2016Existing optical flow methods make generic, spatially homogeneous, assumptions about the spatial structure of the flow. In reality, optical flow varies across an image depending on object class. Simply put, different objects move differently. Here we ... More
Understanding the correlation between $(g-2)_μ$ and $μ\rightarrow e γ$ in the MSSMMay 12 2014Aug 21 2014The supersymmetric contributions to the muon anomalous magnetic moment $a_\mu$ and to the decay $\mu\to e\gamma$ are given by very similar Feynman diagrams. Previous works reported correlations in specific scenarios, in particular if $a_\mu$ is dominated ... More
A second-order face-centred finite volume method for elliptic problemsAug 08 2019A second-order face-centred finite volume method (FCFV) is proposed. Contrary to the more popular cell-centred and vertex-centred finite volume (FV) techniques, the proposed method defines the solution on the faces of the mesh (edges in two dimensions). ... More
Start-up flow in shallow deformable microchannelsFeb 19 2019Jun 18 2019Microfluidic systems are usually fabricated with soft materials that deform due to the fluid stresses. Recent experimental and theoretical studies on the steady flow in shallow deformable microchannels have shown that the flow rate is a nonlinear function ... More
Bose-Einstein condensation in multilayersDec 03 2009The critical BEC temperature $T_{c}$ of a non interacting boson gas in a layered structure like those of cuprate superconductors is shown to have a minimum $T_{c,m}$, at a characteristic separation between planes $a_{m}$. It is shown that for $a<a_{m}$, ... More
Dimensional crossover of a boson gas in multilayersJul 08 2010We obtain the thermodynamic properties for a non-interacting Bose gas constrained on multilayers modeled by a periodic Kronig-Penney delta potential in one direction and allowed to be free in the other two directions. We report Bose-Einstein condensation ... More
Global stability analysis of the axisymmetric wake past a spinning bullet-shaped bodyApr 03 2014We analyze the global linear stability of the axisymmetric flow around a spinning bullet-shaped body as a function of the Reynolds number, $Re=w_{\infty}D/\nu$, and of the rotation parameter $\Omega=\omega D/(2 w_{\infty})$, in the ranges $Re<450$ and ... More
Recent Developments in CAD/analysis IntegrationOct 31 2012For linear elastic problems, it is well-known that mesh generation dominates the total analysis time. Different types of methods have been proposed to directly or indirectly alleviate this burden associated with mesh generation. We review in this paper ... More
BEC, BCS and BCS-Bose Crossover Theories in Superconductors and SuperfluidsDec 16 2004Feb 23 2005For the Cooper/BCS model interaction in superconductors (SCs) it is shown: a) how BCS-Bose crossover picture transition temperatures Tc, defined self-consistently by both the gap and fermion-number equations, require unphysically large couplings to differ ... More
New Science, New Media: An Assessment of the Online Education and Public Outreach Initiatives of The Dark Energy SurveyApr 02 2018Sep 18 2018As large-scale international collaborations become the standard for astronomy research, a wealth of opportunities have emerged to create innovative education and public outreach (EPO) programming. In the past two decades, large collaborations have focused ... More
Synchronization of Intermittent Behavior in Ensembles of Multistable Dynamical SystemsFeb 16 2015We propose a methodology to analyze synchronization in an ensemble of diffusively coupled multistable systems. First, we study how two bidirectionally coupled multistable oscillators synchronize and demonstrate the high complexity of the basins of attraction ... More
Precision test of a Fermion mass textureApr 09 2001Jun 05 2001Texture zeros in the quark Yukawa matrices generally lead to precise and simple expressions for CKM matrix elements in terms of ratios of quark masses. Using the new data on $b-$decays we test a particularly promising texture zero solution and show that ... More
$S_3$ as a unified family theory for quarks and leptonsOct 01 2012We present an $S_3$-invariant extension of the SM which is able to account for the mixing both in the quark and the lepton sector. We focus here on the quark sector and present different realizations of the model, according to how many Higgs fields are ... More
Quark sector of S3 models: classification and comparison with experimental dataApr 24 2013S3 models offer a low energy approach to describe the observed pattern of masses and mixing, of both quarks and leptons. In this work, we first revisit an S3 model with only one Higgs electroweak doublet, where the flavour symmetry must be broken in order ... More
The BCS-Bose Crossover TheorySep 05 2005Jan 23 2007We contrast {\it four} distinct versions of the BCS-Bose statistical crossover theory according to the form assumed for the electron-number equation that accompanies the BCS gap equation. The four versions correspond to explicitly accounting for two-hole-(2h) ... More
Star/galaxy separation at faint magnitudes: Application to a simulated Dark Energy SurveyJun 21 2013May 13 2015We address the problem of separating stars from galaxies in future large photometric surveys. We focus our analysis on simulations of the Dark Energy Survey (DES). In the first part of the paper, we derive the science requirements on star/galaxy separation, ... More
The Dark Energy Survey Data Management SystemSep 30 2011The Dark Energy Survey (DES) is a project with the goal of building, installing and exploiting a new 74 CCD-camera at the Blanco telescope, in order to study the nature of cosmic acceleration. It will cover 5000 square degrees of the southern hemisphere ... More
Implications of Quantum Computing for Artificial Intelligence alignment researchAug 19 2019Aug 22 2019We introduce a heuristic model of Quantum Computing and apply it to argue that a deep understanding of quantum computing is unlikely to be helpful to address current bottlenecks in Artificial Intelligence Alignment. Our argument relies on the claims that ... More
Decomposing replicable functionsMar 24 2008Mar 25 2008We describe an algorithm to decompose rational functions from which we determine the poset of groups fixing these functions.
On Ritt's decomposition Theorem in the case of finite fieldsMar 27 2008Apr 10 2008A classical theorem by Ritt states that all the complete decomposition chains of a univariate polynomial satisfying a certain tameness condition have the same length. In this paper we present our conclusions about the generalization of these theorem in ... More
On decomposition of tame polynomials and rational functionsApr 10 2008In this paper we present algorithmic considerations and theoretical results about the relation between the orders of certain groups associated to the components of a polynomial and the order of the group that corresponds to the polynomial, proving it ... More
Low-dimensional BECJun 28 2000Aug 30 2000The Bose-Einstein condensation (BEC) temperature $T_{c}$ of Cooper pairs (CPs) created from a very general interfermion interaction is determined for a {\it linear}, as well as the usual quadratic, energy {\it vs}% center-of-mass momentum dispersion relation. ... More
Harmonically Trapped Quantum GasesMay 23 2002We solve the problem of a Bose or Fermi gas in $d$-dimensions trapped by $% \delta \leq d$ mutually perpendicular harmonic oscillator potentials. From the grand potential we derive their thermodynamic functions (internal energy, specific heat, etc.) as ... More
Diffusion of active chiral particlesNov 19 2016The diffusion of chiral active Brownian particles in three-dimensional space is studied analytically, by consideration of the corresponding Fokker-Planck equation for the probability density of finding a particle at position $\boldsymbol{x}$ and moving ... More
Aplicacion de la descomposicion racional univariada a monstrous moonshine (in Spanish)May 15 2008This paper shows how to use Computational Algebra techniques, namely the decomposition of rational functions in one variable, to explore a certain set of modular functions, called replicable functions, that arise in Monstrous Moonshine. In particular, ... More
Computation of unirational fields (extended abstract)Apr 10 2008In this paper we present an algorithm for computing all algebraic intermediate subfields in a separably generated unirational field extension (which in particular includes the zero characteristic case). One of the main tools is Groebner bases theory. ... More
Systematic Mapping Protocol: The impact of using software patterns during requirements engineering activities in real-world settingsJan 20 2017This document details the planning phase of a Systematic Mapping Study (SMS). Our goal is to identify the software patterns used during the RE phase, in real-world setting (i.e., in real projects), not in academia (toy projects) and, to understand the ... More
Mobility of thorium ions in liquid xenonMar 22 2005We present a measurement of the $^{226}$Th ion mobility in LXe at 163.0 K and 0.9 bar. The result obtained, 0.240$\pm$0.011 (stat) $\pm$0.011 (syst) cm$^{2}$/(kV-s), is compared with a popular model of ion transport.
BCS and BEC Finally Unified: A Brief ReviewNov 21 2002Nov 28 2002We review efforts to unify both the Bardeen, Cooper and Schrieffer (BCS) and Bose-Einstein condensation (BEC) pictures of superconductivity. We have finally achieved this in terms of a "\textit{complete} boson-fermion (BF) model" (CBFM) that reduces in ... More
Polynomial integration on regions defined by a triangle and a conicMay 06 2010We present an efficient solution to the following problem, of relevance in a numerical optimization scheme: calculation of integrals of the type \[\iint_{T \cap \{f\ge0\}} \phi_1\phi_2 \, dx\,dy\] for quadratic polynomials $f,\phi_1,\phi_2$ on a plane ... More
Hyperelliptic curves with reduced automorphism group A5Sep 10 2012We study genus $g$ hyperelliptic curves with reduced automorphism group $A_5$ and give equations $y^2=f(x)$ for such curves in both cases where $f(x)$ is a decomposable polynomial in $x^2$ or $x^5$. For any fixed genus the locus of such curves is a rational ... More
Deciding trigonality of algebraic curvesMar 24 2011Let C be a non-hyperelliptic algebraic curve of genus at least 3. Enriques and Babbage proved that its canonical image is the intersection of the quadrics that contain it, except when C is trigonal (that is, it has a linear system of degree 3 and dimension ... More
Computation of unirational fieldsApr 10 2008One of the main contributions which Volker Weispfenning made to mathematics is related to Groebner bases theory. In this paper we present an algorithm for computing all algebraic intermediate subfields in a separably generated unirational field extension ... More
Building counterexamples to generalizations for rational functions of Ritt's decomposition theoremApr 10 2008The classical Ritt's Theorems state several properties of univariate polynomial decomposition. In this paper we present new counterexamples to Ritt's first theorem, which states the equality of length of decomposition chains of a polynomial, in the case ... More
Enhancing the stability of the synchronization of multivariable coupled oscillatorsAug 27 2015Synchronization processes in populations of identical networked oscillators are in the focus of intense studies in physical, biological, technological and social systems. Here we analyze the stability of the synchronization of a network of oscillators ... More
Thermodynamics of low-dimensional trapped Fermi gasesDec 08 2016The effects of low dimensionality on the thermodynamics of a Fermi gas trapped by isotropic power law potentials are analyzed. Particular attention is given to different characteristic temperatures that emerge, at low dimensionality, in the thermodynamic ... More
Probability distributions for Poisson processes with pile-upOct 28 2013In this paper, two parametric probability distributions capable to describe the statistics of X-ray photon detection by a CCD are presented. They are formulated from simple models that account for the pile-up phenomenon, in which two or more photons are ... More
Implications of Quantum Computing for Artificial Intelligence alignment researchAug 19 2019We introduce a heuristic model of Quantum Computing and apply it to argue that a deep understanding of quantum computing is unlikely to be helpful to address current bottlenecks in Artificial Intelligence Alignment. Our argument relies on the claims that ... More
Effective radical parametrization of trigonal curvesApr 13 2011Let $C$ be a non-hyperelliptic algebraic curve. It is known that its canonical image is the intersection of the quadrics that contain it, except when $C$ is trigonal (that is, it has a linear system of degree 3 and dimension 1) or isomorphic to a plane ... More
Tschirnhaus-Weierstrass curvesAug 22 2008Jun 09 2011We define the concept of Tschirnhaus-Weierstrass curve, named after the Weierstrass form of an elliptic curve and Tschirnhaus transformations. Every pointed curve has a Tschirnhaus-Weierstrass form, and this representation is unique up to a scaling of ... More
The Dark Energy Survey Image Processing PipelineJan 09 2018The Dark Energy Survey (DES) is a five-year optical imaging campaign with the goal of understanding the origin of cosmic acceleration. DES performs a 5000 square degree survey of the southern sky in five optical bands (g,r,i,z,Y) to a depth of ~24th magnitude. ... More
Phenomenology of flavon fields at the LHCNov 11 2009Mar 16 2010We study low energy constraints from flavour violating processes, production and decay at the LHC of a scalar field varphi (flavon) associated to the breaking of a non-supersymmetric Abelian family symmetry at the TeV scale. This symmetry is constrained ... More
Extendibility of bilinear forms on Banach sequence spacesDec 04 2012We study Hahn-Banach extensions of multilinear forms defined on Banach sequence spaces. We characterize $c_0$ in terms of extension of bilinear forms, and describe the Banach sequence spaces in which every bilinear form admits extensions to any superspace. ... More
Flavour constraints on scenarios with two or three heavy squark generationsJul 12 2012May 10 2013We re-assess constraints from flavour-changing neutral currents in the kaon system on supersymmetric scenarios with a light gluino, two heavy generations of squarks and a lighter third generation. We compute for the first time limits in scenarios with ... More
Approximation by smooth functions with no critical points on separable Banach spacesOct 27 2005We characterize the class of separable Banach spaces $X$ such that for every continuous function $f:X\to\mathbb{R}$ and for every continuous function $\epsilon:X\to\mathbb(0,+\infty)$ there exists a $C^1$ smooth function $g:X\to\mathbb{R}$ for which $|f(x)-g(x)|\leq\epsilon(x)$ ... More
Emergence of collective motion in a model of interacting Brownian particlesOct 13 2014By studying a system of Brownian particles, interacting only through a local social-like force (velocity alignment), we show that self-propulsion is not a necessary feature for the flocking transition to take place as long as underdamped particle dynamics ... More
Impact of Delta mB_s on the determination of the unitary triangle and bounds on physics beyond the Standard ModelMar 15 2006Sep 13 2006We study the impact on the unitarity triangle of the Bs-bar{Bs} flavor oscillation data analyses being carried out at the Tevatron Run II. In the current version of this work we consider the first direct experimental bound on the mass difference Delta ... More
Spectra of weighted algebras of holomorphic functionsFeb 08 2008Feb 12 2008We consider weighted algebras of holomorphic functions on a Banach space. We determine conditions on a family of weights that assure that the corresponding weighted space is an algebra or has polynomial Schauder decompositions. We study the spectra of ... More
Thermodynamics of the Relativistic Fermi gas in D DimensionsJul 27 2014The influence of spatial dimensionality and particle-antiparticle pair production on the thermodynamic properties of the relativistic Fermi gas, at finite chemical potential, is studied. Resembling a kind of phase transition, qualitatively different behaviors ... More
The FE-I4 Telescope for particle tracking in testbeam experimentsMar 24 2016Jun 20 2016A testbeam telescope, based on ATLAS IBL silicon pixel modules, has been built. It comprises six planes of planar silicon sensors with 250 x 50 um^2 pitch, read out by ATLAS FE-I4 chips. In the CERN SPS H8 beamline (180 GeV pi+) a resolution of better ... More
First Steps Towards Radical Parametrization of Algebraic SurfacesJun 07 2012Jun 11 2012We introduce the notion of radical parametrization of a surface, and we provide algorithms to compute such type of parametrizations for families of surfaces, like: Fermat surfaces, surfaces with a high multiplicity (at least the degree minus 4) singularity, ... More
Rolle's theorem is either false or trivial in infinite-dimensional Banach spacesFeb 14 2000We prove the following new characterization of $C^p$ (Lipschitz) smoothness in Banach spaces. An infinite-dimensional Banach space $X$ has a $C^p$ smooth (Lipschitz) bump function if and only if it has another $C^p$ smooth (Lipschitz) bump function $f$ ... More
Smoluchowski Diffusion Equation for Active Brownian SwimmersJan 28 2015Jan 31 2015We study the free diffusion in two dimensions of active-Brownian swimmers subject to passive fluctuations on the translational motion and to active fluctuations on the rotational one. The Smoluchowski equation is derived from a Langevin-like model of ... More
Radical Parametrization of Algebraic Curves by Adjoint CurvesMay 21 2008Sep 20 2010We present algorithms for parametrizing by radicals an irreducible curve, not necessarily plane, when the genus is less o equal to 4 and they are defined over an algebraically closed field of characteristic zero. In addition, we also present an algorithm ... More
An extended catalog of galaxy-galaxy strong gravitational lenses discovered in DES using convolutional neural networksMay 25 2019We search Dark Energy Survey (DES) Year 3 imaging for galaxy-galaxy strong gravitational lenses using convolutional neural networks, extending previous work with new training sets and covering a wider range of redshifts and colors. We train two neural ... More
Chemical Abundance Analysis of Tucana III, the Second $r$-process Enhanced Ultra-Faint Dwarf GalaxyDec 03 2018Jul 16 2019We present a chemical abundance analysis of four additional confirmed member stars of Tucana III, a Milky Way satellite galaxy candidate in the process of being tidally disrupted as it is accreted by the Galaxy. Two of these stars are centrally located ... More
Explosive first-order transition to synchrony in networked chaotic oscillatorsMar 29 2012Critical phenomena in complex networks, and the emergence of dynamical abrupt transitions in the macroscopic state of the system are currently a subject of the outmost interest. We report evidence of an explosive phase synchronization in networks of chaotic ... More
High-Performance Flexible Magnetic Tunnel Junctions for Smart Miniaturized InstrumentsApr 04 2018Flexible electronics is an emerging field in many applications ranging from in vivo biomedical devices to wearable smart systems. The capability of conforming to curved surfaces opens the door to add electronic components to miniaturized instruments, ... More
Photometric redshifts and clustering of emission line galaxies selected jointly by DES and eBOSSSep 23 2015Nov 24 2015We present the results of the first test plates of the extended Baryon Oscillation Spectroscopic Survey. This paper focuses on the emission line galaxies (ELG) population targetted from the Dark Energy Survey (DES) photometry. We analyse the success rate, ... More
Farthest Neighbor: The Distant Milky Way Satellite Eridanus IINov 15 2016Feb 15 2017We present Magellan/IMACS spectroscopy of the recently-discovered Milky Way satellite Eridanus II (Eri II). We identify 28 member stars in Eri II, from which we measure a systemic radial velocity of $v_{\rm hel} = 75.6 \pm 1.3~\mbox{(stat.)} \pm 2.0~\mbox{(sys.)}~\mathrm{km\,s^{-1}}$ ... More
Search for RR Lyrae stars in DES ultra-faint systems: Grus I, Kim 2, Phoenix II, and Grus IISep 13 2019This work presents the first search for RR Lyrae stars (RRLs) in four of the ultra-faint systems imaged by the Dark Energy Survey (DES) using SOAR/Goodman and Blanco/DECam imagers. We have detected two RRLs in the field of Grus I, none in Kim 2, one in ... More
Summation of coefficients of polynomials on $\ell_{p}$ spacesSep 24 2013We investigate the summability of the coefficients of $m$-homogeneous polynomials and $m$-linear mappings defined on $\ell_{p}$-spaces. In our research we obtain results on the summability of the coefficients of $m$-linear mappings defined on $\ell_{p_{1}} ... More
Producing a BOSS-CMASS sample with DES imagingJun 04 2019We present a sample of galaxies with the Dark Energy Survey (DES) photometry that replicates the properties of the BOSS CMASS sample. The CMASS galaxy sample has been well characterized by the Sloan Digital Sky Survey (SDSS) collaboration and was used ... More
Monte Carlo Control Loops for cosmic shear cosmology with DES Year 1Jun 03 2019Weak lensing by large-scale structure is a powerful probe of cosmology and of the dark universe. This cosmic shear technique relies on the accurate measurement of the shapes and redshifts of background galaxies and requires precise control of systematic ... More
Brown dwarf census with the Dark Energy Survey year 3 data and the thin disk scale height of early L typesMar 26 2019In this paper we present a catalogue of 11,745 brown dwarfs with spectral types ranging from L0 to T9, photometrically classified using data from the Dark Energy Survey (DES) year 3 release matched to the Vista Hemisphere Survey (VHS) DR3 and Wide-field ... More
DES J0454-4448: Discovery of the First Luminous z > 6 Quasar from the Dark Energy SurveyApr 13 2015Dec 04 2015We present the first results of a survey for high redshift, z $\ge$ 6, quasars using izY multi-colour photometric observations from the Dark Energy Survey (DES). Here we report the discovery and spectroscopic confirmation of the $\rm z_{AB}, Y_{AB}$ = ... More
Trans-Neptunian objects found in the first four years of the Dark Energy SurveySep 03 2019We present a catalog of 316 trans-Neptunian bodies detected by the Dark Energy Survey (DES). These objects include 245 discoveries by DES (139 not previously published) detected in $\approx 60,000$ exposures from the first four seasons of the survey ("Y4" ... More
Constraints on the redshift evolution of astrophysical feedback with Sunyaev-Zeldovich effect cross-correlationsApr 30 2019An understanding of astrophysical feedback is important for constraining models of galaxy formation and for extracting cosmological information from current and future weak lensing surveys. The thermal Sunyaev-Zel'dovich effect, quantified via the Compton-$y$ ... More
Finding high-redshift strong lenses in DES using convolutional neural networksNov 09 2018Jan 23 2019We search Dark Energy Survey (DES) Year 3 imaging data for galaxy-galaxy strong gravitational lenses using convolutional neural networks. We generate 250,000 simulated lenses at redshifts > 0.8 from which we create a data set for training the neural networks ... More
BAO from angular clustering: optimization and mitigation of theoretical systematicsJan 13 2018Aug 20 2018We study the methodology and potential theoretical systematics of measuring Baryon Acoustic Oscillations (BAO) using the angular correlation functions in tomographic bins. We calibrate and optimize the pipeline for the Dark Energy Survey Year 1 dataset ... More