Abstract:
We study the optimal elliptic regularity (within the scale of Sobolev spaces) of anisotropic div–grad operators in three dimensions at a multi-material vertex on the Neumann part of the boundary of a 3D polyhedral domain. The gradient of any solution of the corresponding elliptic partial differential equation (in a neighborhood of the vertex) is p-integrable with p>3.
Keywords:
elliptic div–grad operator, piecewise linear 3D flattening, anisotropic ellipticity in three dimensions, transmission at
material interfaces, mixed Dirichlet–Neumann boundary conditions, optimal Sobolev regularity.
Citation:
R. Haller-Dintelmann, W. Höppner, H.-Ch. Kaiser, J. Rehberg, G. M. Ziegler, “Optimal Elliptic Sobolev Regularity Near Three-Dimensional Multi-Material Neumann Vertices”, Funktsional. Anal. i Prilozhen., 48:3 (2014), 63–83; Funct. Anal. Appl., 48:3 (2014), 208–222
This publication is cited in the following 4 articles:
ter Elst A.F.M., Rehberg J., “Consistent operator semigroups and their interpolation”, J. Operat. Theor., 82:1 (2019), 3–21
D. Horstmann, H. Meinlschmidt, J. Rehberg, “The full Keller-Segel model is well-posed on nonsmooth domains”, Nonlinearity, 31:4 (2018), 1560–1592
H. Meinlschmidt, C. Meyer, J. Rehberg, “Optimal control of the thermistor problem in three spatial dimensions, Part 1: Existence of optimal solutions”, SIAM J. Control Optim., 55:5 (2017), 2876–2904
K. Disser, H.-Ch. Kaiser, J. Rehberg, “Optimal Sobolev regularity for linear second-order divergence elliptic operators occurring in real-world problems”, SIAM J. Math. Anal., 47:3 (2015), 1719–1746