Browsing EIOArtigos by Title
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Nonlinear differential equations with perturbed Dirichlet integral boundary conditions
(Springer, 2021)This paper is devoted to prove the existence of positive solutions of a second order differential equation with a nonhomogeneous Dirichlet conditions given by a parameter dependence integral. The studied problem is a ... 
A nonparametric approach to the estimation of lengths and surface areas
(Institute of Mathematical Statistics, 2007)The Minkowski content L0(G) of a body G⊂ℝd represents the boundary length (for d=2) or the surface area (for d=3) of G. A method for estimating L0(G) is proposed. It relies on a nonparametric estimator based on the information ... 
Nontrivial solutions of inverse discrete problems with signchanging nonlinearities
(Springer, 2019)This paper is concerned with the existence of solutions of an inverse discrete problem with signchanging nonlinearity. This kind of problems includes, as a particular case, nth order difference equations coupled with ... 
A Novel Technique to Control the Accuracy of a Nonlinear Fractional Order Model of COVID19: Application of the CESTAC Method and the CADNA Library
(MDPI, 2021)In this paper, a nonlinear fractional order model of COVID19 is approximated. For this aim, at first we apply the Caputo–Fabrizio fractional derivative to model the usual form of the phenomenon. In order to show the ... 
A Novel Technique to Solve the Fuzzy System of Equations
(MDPI, 2020)The aim of this research is to apply a novel technique based on the embedding method to solve the n×n fuzzy system of linear equations (FSLEs). By using this method, the strong fuzzy number solutions of FSLEs can be obtained ... 
NPCirc: An R package for nonparametric circular methods
(American Statistical Association, 201410)Nonparametric density and regression estimation methods for circular data are included in the R package NPCirc. Speci cally, a circular kernel density estimation procedure is provided, jointly with di erent alternatives ... 
Numerical Solution of Stieltjes Differential Equations
(MDPI, 2020)This work is devoted to the obtaining of a new numerical scheme based on quadrature formulae for the Lebesgue–Stieltjes integral for the approximation of Stieltjes ordinary differential equations. This novel method allows ... 
On a discontinuous beamtype equation with deviating argument in the curvature
(Springer International Publishing, 20161012) 
On a new class of antiperiodic fractional boundary value problems
(Hindawi, 2013)This paper investigates a new class of antiperiodic boundary value problems of higher order fractional differential equations. Some existence and uniqueness results are obtained by applying some standard fixed point ... 
On estimating the perimeter using the alphashape
(Institut Henri Poincaré, 2017)We consider the problem of estimating the perimeter of a smooth domain in the plane based on a sample from the uniform distribution over the domain. We study the performance of the estimator defined as the perimeter of the ... 
On Exact Controllability of FirstOrder Impulsive Differential Equations
(SpringerOpen, 2010)Many dynamical systems have an impulsive dynamical behavior due to abrupt changes at certain instants during the evolution process. The mathematical description of these phenomena leads to impulsive differential equations. ... 
On fractional derivatives and primitives of periodic functions
(Hindawi, 2014)We prove that the fractional derivative or the fractional primitive of a periodic function cannot be a 𝑇periodic function, for any period 𝑇, with the exception of the zero function 
On fractional Langevin equation involving two fractional orders in different intervals
(Vilnius University Press, 2019)In this paper, we study a nonlinear Langevin equation involving two fractional orders α ∈ (0; 1] and β ∈ (1; 2] with initial conditions. By means of an interesting fixed point theorem, we establish sufficient conditions ... 
On fractional order dengue epidemic model
(Hindawi, 2014)This paper deals with the fractional order dengue epidemic model. The stability of diseasefree and positive fixed points is studied. AdamsBashforthMoulton algorithm has been used to solve and simulate the system of ... 
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 ...