2 papers
math.AP2023
Nittka's invariance criterion and Hilbert space valued parabolic equations in
W. Arendt, A. F. M. ter Elst, M. Sauter
Nittka gave an efficient criterion on a form defined on which implies that the associated semigroup is -invariant for some given . We extend this cr…
math.AP2023
The Perron solution for elliptic equations without the maximum principle
W. Arendt, A. F. M. ter Elst, M. Sauter
In this article we consider the Dirichlet problem on a bounded domain with respect to a second-order elliptic differential operator in divergence form. We do n…