CHAPTER 11 APPENDIX

摘要

11.1. Smoothness spaces in the Euclidean setting Here we briefly review Besov and Triebel Lizorkin scales in ?~n. One convenient point of view is offered by the classical Littlewood-Paley theory (cf., e.g., [74], [86]). More specifically, let Ξ be the collection of all systems {ζ-j}-j~∞=0 of hwartz functions with the following properties