Radu, Petronela; Wells, Kelsey A doubly nonlocal Laplace operator and its connection to the classical Laplacian. (English) Zbl 1429.35189 J. Integral Equations Appl. 31, No. 3, 379-409 (2019). Summary: Motivated by the state-based peridynamic framework, we introduce a new nonlocal Laplacian that exhibits double nonlocality through the use of iterated integral operators. The operator introduces additional degrees of flexibility that can allow for better representation of physical phenomena at different scales and in materials with different properties. We study mathematical properties of this state-based Laplacian, including connections with other nonlocal and local counterparts. Finally, we obtain explicit rates of convergence for this doubly nonlocal operator to the classical Laplacian as the radii for the horizons of interaction kernels shrink to zero. Cited in 5 Documents MSC: 35R09 Integro-partial differential equations 45A05 Linear integral equations 45P05 Integral operators 35J05 Laplace operator, Helmholtz equation (reduced wave equation), Poisson equation 35Q74 PDEs in connection with mechanics of deformable solids 74A45 Theories of fracture and damage Keywords:state-based peridynamics; nonlocal models; nonlocal Laplacian; horizon of interaction; convolution; convergence × Cite Format Result Cite Review PDF Full Text: DOI Euclid References: [1] F. Andreu-Vaillo, J.M. Mazón, J.D. Rossi and J.J. Toledo-Melero, Nonlocal diffusion problems, Mathematical Surveys and Monographs \bf165, American Mathematical Society (2010). @bookNonlocalDiffusion, MRKEY = MR2722295, AUTHOR = Andreu-Vaillo, Fuensanta and Mazón, José M. and Rossi, Julio D. and Toledo-Melero, J. 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