Abstract
In the existing language for tensor calculus on RCD spaces, tensor fields are only defined \(\mathfrak {m}\)-a.e.. In this paper we introduce the concept of tensor field defined ‘2-capacity-a.e.’ and discuss in which sense Sobolev vector fields have a 2-capacity-a.e. uniquely defined quasi-continuous representative.
Similar content being viewed by others
References
Ambrosio, L.: Calculus, heat flow and curvature-dimension bounds in metric measure spaces. Proceedings of the ICM 2018 (2018)
Ambrosio, L., Gigli, N., Savaré, G.: Density of Lipschitz functions and equivalence of weak gradients in metric measure spaces. Rev. Mat. Iberoam. 29, 969–996 (2013)
Ambrosio, L., Gigli, N., Savaré, G.: Calculus and heat flow in metric measure spaces and applications to spaces with Ricci bounds from below. Invent Math. 195, 289–391 (2014)
Ambrosio, L., Tilli, P.: Topics on analysis in metric spaces. Oxford lecture series in mathematics and its applications (2004)
Björn, A., Björn, J.: Nonlinear potential theory on metric spaces, vol. 17 of EMS Tracts in Mathematics, European Mathematical Society (EMS), Zürich (2011)
Bouleau, N., Hirsch, F.: Dirichlet forms and analysis on Wiener space, De Gruyter studies in mathematics, W. de Gruyter (1991)
Bruè, E., Semola, D.: Constancy of the dimension for RCD(K,N) spaces via regularity of Lagrangian flows. Accepted at Comm.Pure and Appl.Math. arXiv:1804.07128
Cheeger, J.: Differentiability of Lipschitz functions on metric measure spaces. Geom. Funct. Anal. 9, 428–517 (1999)
De Philippis, G., Núñez-Zimbrón, J.: The behavior of harmonic functions at singular points of RCD spaces. Preprint, arXiv:1909.05220
Denneberg, D.: Non-Additive Measure and Integral, Theory and Decision Library B. Springer, Netherlands (2010)
Gigli, N.: Nonsmooth differential geometry - an approach tailored for spaces with Ricci curvature bounded from below. Mem. Amer. Math. Soc. 251, v + 161 (2014)
Gigli, N.: Lecture notes on differential calculus on RCD spaces. Publ. RIMS Kyoto Univ. 54 (2018)
Gigli, N., De Philippis, G.: Non-collapsed spaces with Ricci curvature bounded from below. Accepted at J. Ec. Polyt. arXiv:1708.02060
Heinonen, J., Koskela, P., Shanmugalingam, N., Tyson, J. T.: Sobolev spaces on metric measure spaces. An approach based on upper gradients, vol. 27 of New Mathematical Monographs. Cambridge University Press, Cambridge (2015)
Koskela, P., Rajala, K., Shanmugalingam, N.: Lipschitz continuity of Cheeger-harmonic functions in metric measure spaces. J. Funct. Anal. 202, 147–173 (2003)
Naber, A., Valtorta, D.: Volume estimates on the critical sets of solutions to elliptic PDEs. Comm. Pure Appl. Math. 70, 1835–1897 (2017)
Savaré, G.: Self-improvement of the Bakry-Émery condition and Wasserstein contraction of the heat flow in RCD(\(K,\infty \)) metric measure spaces. Discrete Contin. Dyn. Syst. 34, 1641–1661 (2014)
Shanmugalingam, N.: Newtonian spaces: an extension of Sobolev spaces to metric measure spaces. Rev. Mat. Iberoamericana 16, 243–279 (2000)
Villani, C.: Synthetic theory of Ricci curvature bounds. Jpn. J. Math. 11(2), 219–263 (2016)
Acknowledgments
This research has been supported by the MIUR SIR-grant ‘Nonsmooth Differential Geometry’ (RBSI147UG4). The authors want to thank Elia Bruè and Daniele Semola for stimulating conversations on the topics of this manuscript.
Author information
Authors and Affiliations
Corresponding author
Additional information
Publisher’s Note
Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.
Rights and permissions
About this article
Cite this article
Debin, C., Gigli, N. & Pasqualetto, E. Quasi-Continuous Vector Fields on RCD Spaces. Potential Anal 54, 183–211 (2021). https://doi.org/10.1007/s11118-019-09823-6
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s11118-019-09823-6