... function of a set E and C∞cΩdenotes the class of compactly supported C∞ -functions on Ω. We also denote by CcΩ theclass of compactly supported continuous functions on Ω.Definition 1.3. ... Fine Properties of Functions, Studies in AdvancedMathematics, CRC Press, Boca Raton, Fla, USA, 1992.14 M. H. Taibleson, On the theory of Lipschitz spaces of distributions on Euclidean n-space. ... 1975.12 V. S. Rychkov, On restrictions and extensions of the Besov and Triebel-Lizorkin spaces with respect toLipschitz domains,” Journal of the London Mathematical Society. Second Series, vol. 60,...