Browsing EIOArtigos by Title
Now showing items 137156 of 213

On fractional orthonormal polynomials of a discrete variable
(Hindawi, 2015)A fractional analogue of classical Gram or discrete Chebyshev polynomials is introduced. Basic properties as well as their relation with the fractional analogue of Legendre polynomials are presented. 
On Homoclinic Solutions of a Semilinear Laplacian Difference Equation with Periodic Coefficients
(SpringerOpen, 2010)We study the existence of homoclinic solutions for semilinear Laplacian difference equations with periodic coefficients. The proof of the main result is based on BrezisNirenberg's Mountain Pass Theorem. Several examples ... 
On impulsive nonlocal integroinitial value problems involving multiorder Caputotype generalized fractional derivatives and generalized fractional integrals
(Springer, 2019)In this paper, we present sufficient criteria ensuring the existence and uniqueness of solutions for nonlinear impulsive multiorder Caputotype generalized fractional differential equations supplemented with nonlocal ... 
On multipoint resonant problems on the halfline
(Springer, 2019)In this work we obtain sufficient conditions for the existence of bounded solutions of a resonant multipoint secondorder boundary value problem, with a fully differential equation. The noninvertibility of the linear ... 
On Some Fixed Point Results for 𝐻+Type Contraction Mappings in Metric Spaces
(Hindawi, 2015)We prove some fixed point theorems for H+type multivalued contractive mappings in the setting of Banach spaces and metric spaces. The results provided allow recovering different wellknown results 
On some nonlinear boundary value problems related to a BlackScholes model with transaction costs
(Springer, 2015)We deal with some generalizations on a BlackScholes model arising in financial mathematics. As a novelty in this paper, we consider a variable volatility and abstract functional boundary conditions, which allow us to treat ... 
On the Existence of Eigenvalues of a Boundary Value Problem with Transmitting Condition of the Integral Form for a ParabolicHyperbolic Equation
(MDPI, 2020)In the paper, we investigate a local boundary value problem with transmitting condition of the integral form for mixed parabolichyperbolic equation with noncharacteristic line of type changing. Theorem on strong solvability ... 
On the gammalogistic map and applications to a delayed neoclassical model of economic growth
(Springer Nature, 201904)In this work, we study the stability properties of a delay differential neoclassical model of economic growth, based on the original model proposed by Solow (Q J Econ 70:65–94, 1956). We consider a logistictype production ... 
On the linear fuzzy model associated with Caputo–Fabrizio operator
(SpringerOpen, 20180605)In this paper, we introduce the fuzzy Caputo–Fabrizio operator under generalized Hukuhara differentiability concept. In this setting, we study the linear fuzzy fractional initial value problems and present the general ... 
On the second order properties of the multidimensional periodogram for regularly spaced data
(Society for Industrial and Applied Mathematics (SIAM), 2009)Recently there is growing interest in improving the level of knowledge of spatial and spatiotemporal processes using spectral techniques. The properties of the estimator of the spectral density, the periodogram, have been ... 
On the smoothness of solutions of the third order nonlinear differential equation
(Springer, 2017)In this work we study the following third order differential equation: Ly := y + (q(x, y) + λ)y = f ∈ L2(R), R = (–∞,∞),λ > 0, where q(x, y) ≥ 1 is a continuous function in all its variables. We will deal with the following ... 
On the stability properties of a delay differential neoclassical model of economic growth
(University of Szeged, 20180626)The main aim of this paper is to establish sharp global stability conditions for the positive equilibrium of a wellknown model of economic growth when a delay is considered in the production function. In order to deal ... 
On the stability properties of a delay differential neoclassical model of economic growth
(University of Szeged, 2018)The main aim of this paper is to establish sharp global stability conditions for the positive equilibrium of a wellknown model of economic growth when a delay is considered in the production function. In order to deal ... 
On the Volterra property of a boundary problem with integral gluing condition for a mixed parabolichyperbolic equation
(Springer, 2013)In the present work, we consider a boundary value problem with gluing conditions of an integral form for the parabolichyperbolic type equation. We prove that the considered problem has the Volterra property. The main tools ... 
One Year of the COVID19 Pandemic in Galicia: A Global View of AgeGroup Statistics during Three Waves
(MDPI, 2021)In this work we look at the past in order to analyze four key variables after one year of the COVID19 pandemic in Galicia (NW Spain): new infected, hospital admissions, intensive care unit admissions and deceased. The ... 
Optimal control of the COVID19 pandemic: controlled sanitary deconfinement in Portugal
(Springer Nature, 2021)The COVID19 pandemic has forced policy makers to decree urgent confinements to stop a rapid and massive contagion. However, after that stage, societies are being forced to find an equilibrium between the need to reduce ... 
OptimalCutpoints: An R Package for Selecting Optimal Cutpoints in Diagnostic Tests
(American Statistical Association, 2014)Continuous diagnostic tests are often used for discriminating between healthy and diseased populations. For the clinical application of such tests, it is useful to select a cutpoint or discrimination value c that defines ... 
Optimization method for identifying the source term in an inverse wave equation
(Texas State University, 2017)In this work, we investigate the inverse problem of identifying a spacewise dependent source term of wave equation from the measurement on the boundary. On the basis of the optimal control framework, the inverse problem ... 
Optimum sample size to estimate mean parasite abundance in fish parasite surveys
(Sciendo, 20180127)To reach ethically and scientifi cally valid mean abundance values in parasitological and epidemiological studies this paper considers analytic and simulation approaches for sample size determination. The sample size ... 
Orthogonal Decomposition of the Genetic Variance for Epistatic Traits Under Linkage Disequilibrium—Applications to the Analysis of BatesonDobzhanskyMüller Incompatibilities and Sign Epistasis
(Frontiers Media, 20190305)The onecenturyold theory of orthogonal genetic variance decomposition originated the field of quantitative genetics and has kept on being improved ever since. Recently, serious concerns about the possibility of attaining ...