-estimates for functions of the Laplace-Beltrami operator on noncompact symmetric spaces. II.
Let be a symmetric space of the noncompact type, with Laplace–Beltrami operator , and let be the -spectrum of . For in such that , let be the operator on defined formally as . In this paper, we obtain operator norm estimates for for all , and show that these are optimal when is small and when is bounded below .
The author establishes the localization principle for the Triebel-Lizorkin spaces on spaces of homogeneous type.