11 citations · 32 across the 5 of their papers we have counts for
4 papers · 1 filter
Final State Observability in Banach spaces with applications to Subordination and Semigroups induced by L{é}vy processes
Dennis Gallaun, Jan Meichsner, Christian Seifert
This paper generalizes the abstract method of proving an observability estimate by combining an uncertainty principle and a dissipation estimate. In these estimates we allow for a…
On the harmonic extension approach to fractional powers in Banach spaces
Jan Meichsner, Christian Seifert
We show that fractional powers of general sectorial operators on Banach spaces can be obtained by the harmonic extension approach. Moreover, for the corresponding second order ordi…
Subordination for sequentially equicontinuous equibounded -semigroups
Karsten Kruse, Jan Meichsner, Christian Seifert
We consider operators on a sequentially complete Hausdorff locally convex space such that generates a (sequentially) equicontinuous equibounded -semigroup. For ev…
Fractional powers of non-negative operators in Banach spaces via the Dirichlet-to-Neumann operator
Jan Meichsner, Christian Seifert
We consider fractional powers of non-densely defined non-negative operators in Banach spaces defined by means of the Balakrishnan operator. Under mild assumptions on the operator w…