A symbolic calculus for pseudo differential operators generating Feller semigroups
The author introduces a calculus of pseudodifferential operators similar to the classical case of Hörmander classes. From the text: ``Hörmander type symbols are not good choice in general for the operators we have in mind, but anyhow such calculus typically yields estimates in \(L^2\)-context and on the other hand needs no oscillation bounds for the symbols. In this way, it combines in a sense the advantages of both upper approaches''.
calculus of pseudodifferential operators
scientific article; zbMATH DE number 1270290