Mathematical Inequalities & Applications · Volume 27, Issue 2 Extension formulas and norm inequalities in Sobolev Hilbert spaces 27-33 Pages 489-497 DOI 10.7153/mia-2024-27-33 Downloads Short PDF Full PDF PNG Authors Saburou Saitoh Keywords extension and restriction of a function Sobolev space Fourier transform reproducing kernel bounded linear operators norm estimate norm inequality Subject classes 30C40 44A05 35A22 46E22 45A05