Unbounded derivations |
| |
Authors: | Richard H Herman |
| |
Affiliation: | Department of Mathematics, Pennsylvania State University, University Park, Pennsylvania 16802 U.S.A. |
| |
Abstract: | In this note we discuss various extensions of a normal 1 derivation of a uniformly hyperfinite C1-algebra. Various approximation theorems are employed to show when said extensions generate automorphism groups of the C1-algebra. We characterize the “maximal” extension of Sakai and Powers as a graph limit and show when this extension is the closure of the given derivation. We also discuss an identity obeyed by the resolvent of a derivation. |
| |
Keywords: | |
本文献已被 ScienceDirect 等数据库收录! |
|