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3 votes
0 answers
74 views

Algebra core for generator of Dirichlet form

This is a question about the existence of a core $C$ for the generator $A$ of a regular Dirichlet form $\mathcal{E}$ having a carré du champ $\Gamma$, so that $C$ is an algebra with respect to ...
Curious's user avatar
  • 143
4 votes
1 answer
192 views

Analyticity of the semigroup generated by a time-changed Brownian motion

Let $d$ be an integer. We denote by $m$ the Lebesgue measure on $\mathbb{R}^d$. We define $BL(\mathbb{R}^d)$ by \begin{align*} BL(\mathbb{R}^d)=\{f \in L^2_{\rm loc}(\mathbb{R}^d,m) \mid |\nabla f|\in ...
sharpe's user avatar
  • 701
2 votes
1 answer
196 views

Compactness of semigroups, boundary conditions

I have a question about compactness of semigroups and boundary conditions. Let $\Omega$ be an unbounded domain of $\mathbb{R}^d$ with smooth boundary and $m(\Omega)=\infty$. Then we can define two ...
sharpe's user avatar
  • 701
5 votes
2 answers
724 views

Symmetric Feller processes and Dirichlet forms

Let $(G, \mathcal D)$ be a densely defined operator on $C_0$ (continuous functions vanishing at infinity on some nice topological space) whose closure $\bar G$ generates a Feller semigroup and let $X$ ...
Hans's user avatar
  • 438
8 votes
1 answer
1k views

Is there a regular Dirichlet form with no associated Feller process?

I'm reading Dirichlet Forms and Symmetric Markov Processes by M. Fukushima, Y. Oshima, and M. Takeda (hereafter, [FOT]). In Chapter 7, where they discuss the construction of a Markov process ...
Nate Eldredge's user avatar