本书内容简介：This book is an outgrowth of a course which I gave atOrsay duringthe academic year 1 966.67 MY purpose in those lectureswas to pre-sent some of the required background and at the sametime clarify theessential unity that ests between several relatedareas of analysis.These areas are：the estence and boundedness ofsingular integral op-erators；the boundary behavior of harmonicfunctions；and differentia-bility properties of functions of severalvariables.AS such the moncore of these topics may be said torepresent one of the central develop-ments in n.dimensional Fourieranalysis during the last twenty years，and it can be expected tohave equal influence in the future.These pos.
