𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Fractional Powers of Operators of Regularized Type

✍ Scribed by Ralph deLaubenfels; Fuyuan Yao; Shengwang Wang


Publisher
Elsevier Science
Year
1996
Tongue
English
Weight
246 KB
Volume
199
Category
Article
ISSN
0022-247X

No coin nor oath required. For personal study only.

✦ Synopsis


We construct fractional powers of operators whose C-regularized resolvent Ε½ . y 1 Ε½ . wyA C is O 1rw in an appropriate sector. This includes operators with polynomially bounded resolvent. Our construction has the properties one expects, analogous to the case when C s I; in particular, it satisfies mapping properties. We derive many new facts about the regularized resolvent.


πŸ“œ SIMILAR VOLUMES


Extremal Growth of Powers of Operators S
✍ Omar El-Fallah; Thomas Ransford πŸ“‚ Article πŸ“… 2002 πŸ› Elsevier Science 🌐 English βš– 172 KB

Let E be a compact subset of the unit circle. We determine the extremal rate of growth of Γ°jjT n jjÞ n51 for Banach-space operators T satisfying the resolvent condition jjΓ°T Γ€ lIÞ Γ€1 jj4 const: distΓ°l; EÞ Γ°jlj > 1Þ: This includes, as extreme cases, the Kreiss condition E ΒΌ T and the Ritt condition

Characterization of the Domain of Fracti
✍ Takao Nambu πŸ“‚ Article πŸ“… 1997 πŸ› Elsevier Science 🌐 English βš– 449 KB

We study a class of elliptic differential operators with feedback boundary conditions of the Dirichlet type and the generalized Neumann type. The domain of the fractional powers of these operators is completely characterized in terms of various Sobolev spaces. The results are an extension of the sta

A General Framework for Regularized Eval
✍ Charles W. Groetsch; Martin Hanke πŸ“‚ Article πŸ“… 1996 πŸ› Elsevier Science 🌐 English βš– 154 KB

A general approach is developed for stable evaluation of unbounded operators when the data are corrupted by error. The essence of the approach is to recast the direct problem of evaluating the unstable operator as an inverse problem involving an associated bounded operator. Classical general regular