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Bulletin of the American Mathematical Society

The Bulletin publishes expository articles on contemporary mathematical research, written in a way that gives insight to mathematicians who may not be experts in the particular topic. The Bulletin also publishes reviews of selected books in mathematics and short articles in the Mathematical Perspectives section, both by invitation only.

ISSN 1088-9485 (online) ISSN 0273-0979 (print)

The 2020 MCQ for Bulletin of the American Mathematical Society is 0.84.

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Mappings with integrable dilatation in higher dimensions
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by Juan J. Manfredi and Enrique Villamor PDF
Bull. Amer. Math. Soc. 32 (1995), 235-240 Request permission

Abstract:

Let ${F \in W_{{\text {loc}}}^{1,n}(\Omega ;{\mathbb {R}^n})}$ be a mapping with nonnegative Jacobian ${{J_F}(x) = \det DF(x) \geq 0}$ for a.e. x in a domain ${\Omega \subset {\mathbb {R}^n}}$. The dilatation of F is defined (almost everywhere in ${\Omega }$) by the formula \[ K(x) = \frac {{|DF(x){|^n}}}{{{J_F}(x)}}.\] Iwaniec and Šverák [IS] have conjectured that if ${p \geq n - 1}$ and ${K \in L_{loc}^p(\Omega )}$ then F must be continuous, discrete and open. Moreover, they have confirmed this conjecture in the two-dimensional case n = 2. In this article, we verify it in the higher-dimensional case ${n \geq 2}$ whenever ${p > n - 1}$.
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Additional Information
  • © Copyright 1995 American Mathematical Society
  • Journal: Bull. Amer. Math. Soc. 32 (1995), 235-240
  • MSC: Primary 30C65; Secondary 35J70
  • DOI: https://doi.org/10.1090/S0273-0979-1995-00583-5
  • MathSciNet review: 1313107