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Open AccessMonotone iterations of two obstacle problems with different operators
In this paper we analyze iterations of the obstacle problem for two different operators. We solve iteratively the obstacle problem from above or below for two different differential operators with obstacles gi...
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Homogenization for Nonlocal Evolution Problems with Three Different Smooth Kernels
In this paper we consider the homogenization of the evolution problem associated with a jump process that involves three different smooth kernels that govern the jumps to/from different parts of the domain. We...
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Asymptotic \(C^{1,\gamma }\) -regularity for value functions to uniformly elliptic dynamic programming principles
In this paper we prove an asymptotic \(C^{1,\gamma }\) C ...
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A game theoretical approximation for solutions to nonlinear systems with obstacle-type equations
In this paper we find viscosity solutions to a coupled system composed by two equations, the first one is an obstacle type equation, $$\min \{...
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Mixing Local and Nonlocal Evolution Equations
In this paper, we study the homogenization of a stochastic process and its associated evolution equations in which we mix a local part (given by a Brownian motion with a reflection on the boundary) and a nonlo...
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Fractional convexity
We introduce a notion of fractional convexity that extends naturally the usual notion of convexity in the Euclidean space to a fractional setting. With this notion of fractional convexity, we study the fractio...
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A convection–diffusion model on a star-shaped graph
In this paper we study a convection–diffusion equation on a star-shaped graph composed by n incoming edges and m outgoing edges with a nonlinearity ...
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The First Eigenvalue for Nonlocal Operators
In this chapter we present some results concerning the first eigenvalue for a nonlocal operator in convolution form with a smooth kernel. Given a bounded domain
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Splitting methods and numerical approximations for a coupled local/nonlocal diffusion model
In this paper, we study a splitting approach and a numerical method to approximate solutions to an evolution problem that couples local and nonlocal diffusion operators. The method proposed here takes advantag...
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Asymptotic behaviour for local and nonlocal evolution equations on metric graphs with some edges of infinite length
We study local (the heat equation) and nonlocal (convolution-type problems with an integrable kernel) evolution problems on a metric connected finite graph in which some of the edges have infinity length. We s...
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Dirichlet-to-Neumann Maps on Trees
In this paper we study the Dirichlet-to-Neumann map for solutions to mean value formulas on trees. We give two alternative definition of the Dirichlet-to-Neumann map. For the first definition (that involves th...
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A game theoretical approach for a nonlinear system driven by elliptic operators
In this paper we find viscosity solutions to an elliptic system governed by two different operators (the Laplacian and the infinity Laplacian) using a probabilistic approach. We analyze a game that combines th...
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Coupling local and nonlocal evolution equations
We prove existence, uniqueness and several qualitative properties for evolution equations that combine local and nonlocal diffusion operators acting in different subdomains and coupled in such a way that the r...
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An Asymptotic Mean Value Formula for Eigenvalues of the Hessian Related to Concave/Convex Envelopes
In this paper we characterize viscosity solutions to the PDE λj(D2u) = 0 by means of the asymptotic mean value formula u(x)=mindim(S)=jmaxv∈S,|v|=112u(x+𝜖v)+12u(x−𝜖v)+o(𝜖2),$$ u(x) = \underset{\dim(S)=j}{\min} \u...
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In this paper we study the Dirichlet eigenvalue problem
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A limiting problem for a family of eigenvalue problems involving p-Laplacians
In this paper we analyse the existence of principal eigenvalues and eigenfunctions for a family of eigenvalue problems described by a system consisting in two partial differential equations involving p-Laplacians...
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Nonlocal perimeter, curvature and minimal surfaces for measurable sets
In this paper, we study the nonlocal perimeter associated with a nonnegative radial kernel J: ℝN → ℝ, verifying ∫ℝNJ(z)dz = 1. The nonlocal perimeter studied here is given by the interactions (measured in terms o...
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The \(\infty \) -eigenvalue problem with a sign-changing weight
Let \(\Omega \subset {\mathbb {R}}^{n}\) Ω ...
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An Obstacle Problem for Nonlocal Equations in Perforated Domains
In this paper we analyze the behavior of solutions to a nonlocal equation of the form J ∗ u (x) − u (x) = f (x) in a perforated domain Ω ∖ A 𝜖 with u = 0 in ...
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A concave–convex problem with a variable operator
We study the following elliptic problem \(-A(u) = \lambda u^q\) ...