We show that, under general conditions, the operator (-∇. μ ∇+ 1)^ 1/2 (-∇. μ∇+ 1) 1/2 with mixed boundary conditions provides a topological isomorphism between W^ 1, p _D (Ω)\rm …
M Egert - Journal of Differential Equations, 2018 - Elsevier
This article focuses on L p-estimates for the square root of elliptic systems of second order in divergence form on a bounded domain. We treat complex bounded measurable coefficients …
H Abels, H Garcke, J Haselböck - Nonlinear Analysis: Real World …, 2025 - Elsevier
We prove existence of weak solutions to a diffuse interface model describing the flow of a fluid through a deformable porous medium consisting of two phases. The system non …
S Bechtel, M Egert - Journal of Fourier Analysis and Applications, 2019 - Springer
A full interpolation theory for Sobolev functions with smoothness between 0 and 1 and vanishing trace on a part of the boundary of an open set is established. Geometric …
K Disser, AFM Ter Elst, J Rehberg - ANNALI SCUOLA NORMALE …, 2017 - journals.sns.it
In this paper we investigate linear parabolic, second-order boundaryvalue problems with mixed boundary conditions on rough domains. Assuming only boundedness/ellipticity on the …
We discuss an optimal control problem governed by a quasilinear parabolic PDE including mixed boundary conditions and Neumann boundary control, as well as distributed control …
We obtain the Kato square root estimate for second order elliptic operators in divergence form with mixed boundary conditions on an open and possibly unbounded set in R d under …