J. Voigt

activity

20182022

collaborators

4 papers

math.FA2022

On sequences of sectorial forms converging `from above'

Hendrik Vogt, Jürgen Voigt

We present a form convergence theorem for sequences of sectorial forms and their associated semigroups in a complex Hilbert space. Roughly speaking, the approximating forms $a_{n}$ a…

math.FA2022

Couplings and primitives on topological spaces

Jürgen Voigt

For an open covering $U$ of a topological space and a mapping $d : I \to K$ , where $\mathcal I:=\bigl\{(U,V)\in\mathcal U\times\mathcal U;\ U\cap V\ne\v…

math.AP2021

On the existence of distributional potentials

Jürgen Voigt

We present proofs for the existence of distributional potentials $F \in D^{'} (Ω)$ for distributional vector fields $G \in D^{'} (Ω)^{n}$ , i.e. $grad F = G$ , w…

math.FA2018

Increasing sequences of sectorial forms

Hendrik Vogt, Jürgen Voigt

We prove convergence results for `increasing' sequences of sectorial forms. We treat both the case of closed forms and the case of non-closable forms.