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Rectifiability

Rectifiability PDF Author: Pertti Mattila
Publisher: Cambridge University Press
ISBN: 1009288091
Category : Mathematics
Languages : en
Pages : 182

Book Description
Rectifiable sets, measures, currents and varifolds are foundational concepts in geometric measure theory. The last four decades have seen the emergence of a wealth of connections between rectifiability and other areas of analysis and geometry, including deep links with the calculus of variations and complex and harmonic analysis. This short book provides an easily digestible overview of this wide and active field, including discussions of historical background, the basic theory in Euclidean and non-Euclidean settings, and the appearance of rectifiability in analysis and geometry. The author avoids complicated technical arguments and long proofs, instead giving the reader a flavour of each of the topics in turn while providing full references to the wider literature in an extensive bibliography. It is a perfect introduction to the area for researchers and graduate students, who will find much inspiration for their own research inside.

Rectifiability

Rectifiability PDF Author: Pertti Mattila
Publisher: Cambridge University Press
ISBN: 1009288091
Category : Mathematics
Languages : en
Pages : 182

Book Description
Rectifiable sets, measures, currents and varifolds are foundational concepts in geometric measure theory. The last four decades have seen the emergence of a wealth of connections between rectifiability and other areas of analysis and geometry, including deep links with the calculus of variations and complex and harmonic analysis. This short book provides an easily digestible overview of this wide and active field, including discussions of historical background, the basic theory in Euclidean and non-Euclidean settings, and the appearance of rectifiability in analysis and geometry. The author avoids complicated technical arguments and long proofs, instead giving the reader a flavour of each of the topics in turn while providing full references to the wider literature in an extensive bibliography. It is a perfect introduction to the area for researchers and graduate students, who will find much inspiration for their own research inside.

Analytic Capacity, Rectifiability, Menger Curvature and Cauchy Integral

Analytic Capacity, Rectifiability, Menger Curvature and Cauchy Integral PDF Author: Hervé Pajot
Publisher: Springer Science & Business Media
ISBN: 9783540000013
Category : Mathematics
Languages : en
Pages : 140

Book Description
Based on a graduate course given by the author at Yale University this book deals with complex analysis (analytic capacity), geometric measure theory (rectifiable and uniformly rectifiable sets) and harmonic analysis (boundedness of singular integral operators on Ahlfors-regular sets). In particular, these notes contain a description of Peter Jones' geometric traveling salesman theorem, the proof of the equivalence between uniform rectifiability and boundedness of the Cauchy operator on Ahlfors-regular sets, the complete proofs of the Denjoy conjecture and the Vitushkin conjecture (for the latter, only the Ahlfors-regular case) and a discussion of X. Tolsa's solution of the Painlevé problem.

Uniform Rectifiability and Quasiminimizing Sets of Arbitrary Codimension

Uniform Rectifiability and Quasiminimizing Sets of Arbitrary Codimension PDF Author: Guy David
Publisher: American Mathematical Soc.
ISBN: 0821820486
Category : Mathematics
Languages : en
Pages : 146

Book Description
This book is intended for graduate students and research mathematicians interested in calculus of variations and optimal control; optimization.

Rectifiable Sets, Densities and Tangent Measures

Rectifiable Sets, Densities and Tangent Measures PDF Author: Camillo De Lellis
Publisher: European Mathematical Society
ISBN: 9783037190449
Category : Mathematics
Languages : en
Pages : 140

Book Description
The characterization of rectifiable sets through the existence of densities is a pearl of geometric measure theory. The difficult proof, due to Preiss, relies on many beautiful and deep ideas and novel techniques. Some of them have already proven useful in other contexts, whereas others have not yet been exploited. These notes give a simple and short presentation of the former and provide some perspective of the latter. This text emerged from a course on rectifiability given at the University of Zurich. It is addressed both to researchers and students; the only prerequisite is a solid knowledge in standard measure theory. The first four chapters give an introduction to rectifiable sets and measures in Euclidean spaces, covering classical topics such as the area formula, the theorem of Marstrand and the most elementary rectifiability criterions. The fifth chapter is dedicated to a subtle rectifiability criterion due to Marstrand and generalized by Mattila, and the last three focus on Preiss' result. The aim is to provide a self-contained reference for anyone interested in an overview of this fascinating topic.

Analysis of and on Uniformly Rectifiable Sets

Analysis of and on Uniformly Rectifiable Sets PDF Author: Guy David
Publisher: American Mathematical Soc.
ISBN: 0821815377
Category : Mathematics
Languages : en
Pages : 370

Book Description
* The only available reference on uniform rectifiabilityThe text covers the understanding of uniform rectifiability of a given set in terms of the approximate behaviour of the set at most locations and scales.

Rectifiable Measures, Square Functions Involving Densities, and the Cauchy Transform

Rectifiable Measures, Square Functions Involving Densities, and the Cauchy Transform PDF Author: Xavier Tolsa
Publisher: American Mathematical Soc.
ISBN: 1470422522
Category : Cauchy transform
Languages : en
Pages : 130

Book Description
This monograph is devoted to the proof of two related results. The first one asserts that if is a Radon measure in satisfyingfor -a.e. , then is rectifiable. Since the converse implication is already known to hold, this yields the following characterization of rectifiable sets: a set with finite -dimensional Hausdorff measure is rectifiable if and only ifH^1x2EThe second result of the monograph deals with the relationship between the above square function in the complex plane and the Cauchy transform . Assuming that has linear growth, it is proved that is bounded in if and only iffor every square .

Singular Sets of Minimizers for the Mumford-Shah Functional

Singular Sets of Minimizers for the Mumford-Shah Functional PDF Author: Guy David
Publisher: Springer Science & Business Media
ISBN: 3764373024
Category : Mathematics
Languages : en
Pages : 592

Book Description
The Mumford-Shah functional was introduced in the 1980s as a tool for automatic image segmentation, but its study gave rise to many interesting questions of analysis and geometric measure theory. The main object under scrutiny is a free boundary K where the minimizer may have jumps. The book presents an extensive description of the known regularity properties of the singular sets K, and the techniques to get them. It is largely self-contained, and should be accessible to graduate students in analysis. The core of the book is composed of regularity results that were proved in the last ten years and which are presented in a more detailed and unified way.

Fractured Fractals and Broken Dreams

Fractured Fractals and Broken Dreams PDF Author: Guy David
Publisher: Oxford University Press
ISBN: 9780198501664
Category : Mathematics
Languages : en
Pages : 226

Book Description
This book proposes new notions of coherent geometric structure. Fractal patterns have emerged in many contexts, but what exactly is a "pattern" and what is not? How can one make precise the structures lying within objects and the relationships between them? The foundations laid herein provide a fresh approach to a familiar field. From this emerges a wide range of open problems, large and small, and a variety of examples with diverse connections to other parts of mathematics. One of the main features of the present text is that the basic framework is completely new. This makes it easier for people to get into the field. There are many open problems, with plenty of opportunities that are likely to be close at hand, particularly as concerns the exploration of examples. On the other hand the general framework is quite broad and provides the possibility for future discoveries of some magnitude. Fractual geometries can arise in many different ways mathematically, but there is not so much general language for making comparisons. This book provides some tools for doing this, and a place where researchers in different areas can find common ground and basic information.

Theory of Functions of a Complex Variable

Theory of Functions of a Complex Variable PDF Author: Narayan Shanti & Mittal P.K.
Publisher: S. Chand Publishing
ISBN: 8121906393
Category : Science
Languages : en
Pages : 624

Book Description
Theory of Functions of a Complex Variable

Variational Methods in Image Segmentation

Variational Methods in Image Segmentation PDF Author: Jean-Michel Morel
Publisher: Springer Science & Business Media
ISBN: 1468405675
Category : Mathematics
Languages : en
Pages : 257

Book Description
This book contains both a synthesis and mathematical analysis of a wide set of algorithms and theories whose aim is the automatic segmen tation of digital images as well as the understanding of visual perception. A common formalism for these theories and algorithms is obtained in a variational form. Thank to this formalization, mathematical questions about the soundness of algorithms can be raised and answered. Perception theory has to deal with the complex interaction between regions and "edges" (or boundaries) in an image: in the variational seg mentation energies, "edge" terms compete with "region" terms in a way which is supposed to impose regularity on both regions and boundaries. This fact was an experimental guess in perception phenomenology and computer vision until it was proposed as a mathematical conjecture by Mumford and Shah. The third part of the book presents a unified presentation of the evi dences in favour of the conjecture. It is proved that the competition of one-dimensional and two-dimensional energy terms in a variational for mulation cannot create fractal-like behaviour for the edges. The proof of regularity for the edges of a segmentation constantly involves con cepts from geometric measure theory, which proves to be central in im age processing theory. The second part of the book provides a fast and self-contained presentation of the classical theory of rectifiable sets (the "edges") and unrectifiable sets ("fractals").