Asymptotic behavior of $BV$ functions and sets of finite perimeter in metric measure spaces
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- by Sylvester Eriksson-Bique, James T. Gill, Panu Lahti and Nageswari Shanmugalingam PDF
- Trans. Amer. Math. Soc. 374 (2021), 8201-8247 Request permission
Abstract:
In this paper, we study the asymptotic behavior of BV functions in complete metric measure spaces equipped with a doubling measure supporting a $1$-Poincaré inequality. We show that at almost every point $x$ outside the Cantor and jump parts of a BV function, the asymptotic limit of the function is a Lipschitz continuous function of least gradient on a tangent space to the metric space based at $x$. We also show that, at co-dimension $1$ Hausdorff measure almost every measure-theoretic boundary point of a set $E$ of finite perimeter, there is an asymptotic limit set $(E)_\infty$ corresponding to the asymptotic expansion of $E$ and that every such asymptotic limit $(E)_\infty$ is a quasiminimal set of finite perimeter. We also show that the perimeter measure of $(E)_\infty$ is Ahlfors co-dimension $1$ regular.References
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Additional Information
- Sylvester Eriksson-Bique
- Affiliation: Research Unit of Mathematical Sciences, P.O. Box 3000, FI-90014 Oulu, Finland
- MR Author ID: 945674
- ORCID: 0000-0002-1919-6475
- Email: sylvester.eriksson-bique@oulu.fi
- James T. Gill
- Affiliation: Department of Mathematics and Statistics, Saint Louis University, Ritter Hall 307, 220 N. Grand Blvd., St. Louis, Missouri 63103
- MR Author ID: 866796
- Email: jim.gill@slu.edu
- Panu Lahti
- Affiliation: Academy of Mathematics and Systems Science, Chinese Academy of Sciences, Beijing 100190, People’s Republic of China
- Email: panulahti@amss.ac.cn
- Nageswari Shanmugalingam
- Affiliation: Department of Mathematical Sciences, P.O. Box 210025, University of Cincinnati, Cincinnati, Ohio 45221-0025
- MR Author ID: 666716
- ORCID: 0000-0002-2891-5064
- Email: shanmun@uc.edu
- Received by editor(s): June 24, 2020
- Received by editor(s) in revised form: January 5, 2021, and April 27, 2021
- Published electronically: August 23, 2021
- Additional Notes: The first author was supported by NSF grant #DMS-1704215. The third author was partially supported by the Finnish Cultural Foundation. The fourth author was partially supported by the NSF grant #DMS-1500440 (U.S.)
- © Copyright 2021 American Mathematical Society
- Journal: Trans. Amer. Math. Soc. 374 (2021), 8201-8247
- MSC (2020): Primary 30L99, 26A45, 31E05, 43A85
- DOI: https://doi.org/10.1090/tran/8495
- MathSciNet review: 4328697