Analytic Capacity, the Cauchy Transform, and Non-homogeneous Calderón–Zygmund Theory

1. Front Matter

   Pages i-xiii

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2. Introduction

   • Xavier Tolsa

   Pages 1-9

3. Basic notation

   • Xavier Tolsa

   Pages 11-13

4. Analytic capacity

   • Xavier Tolsa

   Pages 15-43

5. Basic Calderón-Zygmund theory with non-doubling measures

   • Xavier Tolsa

   Pages 45-74

6. The Cauchy transform and Menger curvature

   • Xavier Tolsa

   Pages 75-101

7. The capacity γ+

   • Xavier Tolsa

   Pages 103-135

8. A Tb theorem of Nazarov, Treil and Volberg

   • Xavier Tolsa

   Pages 137-194

9. The comparability between γ and γ+, and the semiadditivity of analytic capacity

   • Xavier Tolsa

   Pages 195-229

10. Curvature and rectifiability

    • Xavier Tolsa

    Pages 231-288

11. Principal values for the Cauchy transform and rectifiability

    • Xavier Tolsa

    Pages 289-317

12. RBMO (μ) and \( {H}_{atb}^{1}(\mu)\)

    • Xavier Tolsa

    Pages 319-379

13. Back Matter

    Pages 381-396

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This book studies some of the groundbreaking advances that have been made regarding analytic capacity and its relationship to rectifiability in the decade 1995–2005. The Cauchy transform plays a fundamental role in this area and is accordingly one of the main subjects covered. Another important topic, which may be of independent interest for many analysts, is the so-called non-homogeneous Calderón-Zygmund theory, the development of which has been largely motivated by the problems arising in connection with analytic capacity. The Painlevé problem, which was first posed around 1900, consists in finding a description of the removable singularities for bounded analytic functions in metric and geometric terms. Analytic capacity is a key tool in the study of this problem. In the 1960s Vitushkin conjectured that the removable sets which have finite length coincide with those which are purely unrectifiable. Moreover, because of the applications to the theory of uniform rational approximation,he posed the question as to whether analytic capacity is semiadditive. This work presents full proofs of Vitushkin’s conjecture and of the semiadditivity of analytic capacity, both of which remained open problems until very recently. Other related questions are also discussed, such as the relationship between rectifiability and the existence of principal values for the Cauchy transforms and other singular integrals. The book is largely self-contained and should be accessible for graduate students in analysis, as well as a valuable resource for researchers.

• Cauchy transform
• Vitushkin's conjecture
• analytic capacity
• rectifiability

“This is a great book, I studied large portions of it with great benefit and pleasure. It covers a lot of material in this field … with illuminating views from different perspectives. … Most chapters could be read by students with a solid background in analysis, and certain parts of the book could serve as the basis for an advanced student seminar on, say, graduate level. … this outstanding book belongs in every mathematical library.” (Heiko von der Mosel, Jahresbericht der Deutschen Mathematiker-Vereinigung, Vol. 117, 2015)

“This book consists of nine chapters. Each chapter contains a very readable exposition of key results on a given area, and is followed by historical notes with references, including a discussion of further results. … It covers a large amount of mathematics and is certainly both a valuable literature for further research and an excellent textbook for graduate students who want to study in directions of geometric measure theory and harmonic analysis.” (Dachun Yang, zbMATH, Vol. 1290, 2014)

• Departamento de Matemàtiques, Universitat Autónoma de Barcelona ICREA, Bellaterra (Cerdanyola), Spain

  Xavier Tolsa

Xavier Tolsa is Research Professor of Mathematics from ICREA - Universitat Autònoma de Barcelona. He is the author of many research papers in connection with the topics discussed in this book. The present monograph was awarded the 2013 Ferran Sunyer i Balaguer Prize.

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