
The authors give an overview of the different operators which extend the Laplacian one to the fractional derivatives context. They concentrate on their very definitions and basic properties, stressing on some differences among them and the classical Laplacian, also by making use of explicit examples. Alongside, Sobolev spaces of fractional order are presented.
regional fractional Laplacian, spectral fractional Laplacian, Research exposition (monographs, survey articles) pertaining to partial differential equations, Laplace operator, Helmholtz equation (reduced wave equation), Poisson equation, Fractional derivatives and integrals, Heat and other parabolic equation methods for PDEs on manifolds, fractional Laplacian, Fractional partial differential equations, fractional Poisson equations, nonlocal operators
regional fractional Laplacian, spectral fractional Laplacian, Research exposition (monographs, survey articles) pertaining to partial differential equations, Laplace operator, Helmholtz equation (reduced wave equation), Poisson equation, Fractional derivatives and integrals, Heat and other parabolic equation methods for PDEs on manifolds, fractional Laplacian, Fractional partial differential equations, fractional Poisson equations, nonlocal operators
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