Feller Semigroups Obtained by Variable Order Subordination

Details Feller Semigroups Obtained by Variable Order Subordination Feller Semigroups Obtained by Variable Order Subordination

2006-08-02

arxiv.org/abs/math/0608056v2

Mathematics

Functional Analysis

14 pages

Scientific paper

For certain classes of negative definite symbols $q(x,\xi)$ and state space dependent Bernstein function $f(x,s)$ we prove that $-p(x,D)$, the pseudo-differential operator with symbol $-p(x,\xi)=-f(x,q(x,\xi))$, extends to the generator of a Feller semigroup. Our result extends previously known results related to operators of variable (fractional) order of differentiation, or variable order fractional powers. New concrete examples are given.

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