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Differentiability of Lipschitz functions, structure of null sets, and other problems
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Alberti, Giovanni, Csörnyei, Marianna and Preiss, David (2010) Differentiability of Lipschitz functions, structure of null sets, and other problems. In: International Congress of Mathematicians 2010 (ICM 2010), Hyderabad, India, 19-27 Aug 2010. Published in: Proceedings of the International Congress of Mathematicians 2010 (ICM 2010) pp. 1379-1394. doi:10.1142/9789814324359_0101
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Official URL: http://dx.doi.org/10.1142/9789814324359_0101
Abstract
The research presented here developed from rather mysterious observations, originally made by the authors independently and in different circumstances, that Lebesgue null sets may have uniquely defined tangent directions that are still seen even if the set is much enlarged (but still kept Lebesgue null). This phenomenon appeared, for example, in the rank-one property of derivatives of BV functions and, perhaps in its most striking form, in attempts to decide whether Rademacher's theorem on differentiability of Lipschitz functions may be strengthened or not.
We describe the non-differentiability sets of Lipschitz functions on ℝn and use this description to explain the development of the ideas and various approaches to the definition of the tangent fields to null sets. We also indicate connections to other current results, including results related to the study of structure of sets of small measure, and present some of the main remaining open problems.
Item Type: | Conference Item (Paper) | ||||
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Subjects: | Q Science > QA Mathematics | ||||
Divisions: | Faculty of Science, Engineering and Medicine > Science > Mathematics | ||||
Journal or Publication Title: | Proceedings of the International Congress of Mathematicians 2010 (ICM 2010) | ||||
Book Title: | Proceedings of the International Congress of Mathematicians 2010 (ICM 2010) - Vol. I: Plenary Lectures and Ceremonies, Vols. II-IV: Invited Lectures | ||||
Official Date: | 2010 | ||||
Dates: |
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Page Range: | pp. 1379-1394 | ||||
DOI: | 10.1142/9789814324359_0101 | ||||
Status: | Peer Reviewed | ||||
Publication Status: | Published | ||||
Access rights to Published version: | Restricted or Subscription Access | ||||
Conference Paper Type: | Paper | ||||
Title of Event: | International Congress of Mathematicians 2010 (ICM 2010) | ||||
Type of Event: | Conference | ||||
Location of Event: | Hyderabad, India | ||||
Date(s) of Event: | 19-27 Aug 2010 |
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