Listar MAT_Articles por título
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Occultation of Planets by the Moon in European Narrative Medieval Sources
Sage (2019-05)Existing research dealing with astronomical observations from medieval Europe have extensively covered topics such as solar and lunar eclipses and sightings of comets and meteors, but no compilation of occultations of ... -
On a family of rational perturbations of the doubling map
Taylor and Francis (2015-06-17)The goal of this paper is to investigate the parameter plane of a rational family of perturbations of the doubling map given by the Blaschke products Ba(z) = z 3 z−a 1−az¯ . First we study the basic properties of these ...
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On a Linear Functional Mixed Effect Model for Spatial Data
Iranian Statistical Society (2019-08-29)This paper introduces a functional mixed effect random model to model spatial data. In this model, the spatial locations form the index set, while the contributing effects to the response variable are set as a linear ...
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On a reverse Petty projection inequality for projections of convex bodies
De Gruyter (2014-03)We prove a reverse Petty projection inequality which is satisfied by every convex body K. We also study given a convex body K estimates for the dimension k such that there exists a k-dimensional orthogonal projection of K ... -
On balancedness and D-Completeness of the space of Semi-lipschitz functions
Springer Verlag (2008)Let (X, d) be a quasi-metric space and (Y, q) be a quasi-normed linear space. We show that the normed cone of semi-Lipschitz functions from (X, d) to (Y, q) that vanish at a point x0 E X, is balanced. Moreover, it is ...
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On closed subgroups of precompact groups
De Gruyter (2022-09-28)It is a Theorem of W. W. Comfort and K. A. Ross that if G is a subgroup of a compact Abelian group, and S denotes those continuous homomorphisms from G to the one-dimensional torus, then the topology on G is the initial ...
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On convergent sequences in dual groups
Real Academia de Ciencias Exactas, Físicas y Naturales (2020-01-16)We provide some characterizations of precompact abelian groups G whose dual group G∧ p endowed with the pointwise convergence topology on elements of G contains a nontrivial convergent sequence. In the special case of ...
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On Exact Series Solution of Strongly Coupled Mixed Parabolic Problems
Hindawi (2013)This paper studies the construction of the exact solution for parabolic coupled systems of the type ut = Auxx, A1u(0, t) + B1 ux (0,t) 0, A2 u(l, t) + B2 ux (l, t) = 0, 0 < x < 1, t > 0, and u (x, 0) = f(x), where A1, ...
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On interpolating sequences for Bloch type spaces
Elsevier (2022-02-14)When we deal with , it is known that interpolating sequences are interpolating and it is sufficient to interpolate idempotents of in order to interpolate the whole . We will extend these results to the frame of interpolating ...
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On mean outer radii of random polytopes
Indiana University Mathematics Journal (2014)In this paper we introduce a new sequence of quantities for random polytopes. Let KN = conv{X1, . . . ,XN} be a random polytope generated by independent random vectors uniformly distributed in an isotropic convex body K ...
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On new families of anisotropic spatial log-Gaussian Cox processes
Springer (2020)Cox processes are natural models for point process phenomena that are environmentally driven, but much less natural for phenomena driven primarily by interactions amongst the points. The class of log-Gaussian Cox processes ...
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On potentially negative space time covariances obtained as sum of products of marginal ones
Springer Verlag (2008)Most of the literature on spatio-temporal covariance models proposes structures that are positive in the whole domain. However, problems of physical, biological or medical nature need covariance models allowing for ...
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On powers of conjugacy classes in finite groups
De Gruyter (2022-03-17)Let 𝐾 and 𝐷 be conjugacy classes of a finite group 𝐺, and suppose that we have Kn=D∪D−1 for some integer n≥2. Under these assumptions, it was conjectured that ⟨K⟩ must be a (normal) solvable subgroup of 𝐺. Recently ...
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On some descriptive and predictive methods for the dynamics of cancer growth
Alma Mater Studiorum - Università di Bologna (2015-01)Cancer is a widely spread disease that affects a large proportion of the human population, and many research teams are developing algorithms to help medics to understand this disease. In particular, tumor growth has been ...
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On Some Statistical Properties of the Spatio-Temporal Product Density
Universidad Nacional de Colombia (2021)We present an extension of the non-parametric edge-corrected Ohser-type kernel estimator for the spatio-temporal product density function. We derive the mean and variance of the estimator and give a closed-form ...
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On symmetric-conjugate composition methods in the numerical integration of differential equations
American Mathematical Society (2021)We analyze composition methods with complex coefficients exhibiting the so-called “symmetry-conjugate” pattern in their distribution. In particular, we study their behavior with respect to preservation of qualitative ...
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On the absence of analytic integrability of the Bianchi Class B cosmological models
American Institute of Physics (AIP) (2013-02-15)We follow Bogoyavlensky's approach to deal with Bianchi class B cosmological models. We characterize the analytic integrability of such systems.
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On the basins of attraction of a one-dimensional family of root finding algorithms: from Newton to Traub
Springer (2023)In this paper we study the dynamics of damped Traub’s methods Tδ when applied to polynomials. The family of damped Traub’s methods consists of root finding algorithms which contain both Newton’s (δ = 0) and Traub’s method ...
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On the characterization of algebraically integrable plane foliations
American Mathematical Society (2010)We give a characterization theorem for non-degenerate plane foliations of degree different from 1 having a rational first integral. Moreover, we prove that the degree of a non-degenerate foliation as above provides the ...
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On the classification of exceptional planar functions over Fp
Springer Netherlands (2014-12)We will present many strong partial results towards a classification of exceptional planar/PN monomial functions on finite fields. The techniques we use are the Weil bound, Bézout’s theorem, and Bertini’s theorem.
