Abstract
The classical Fatou theorem identifies bounded harmonic functions on the unit disk with bounded measurable functions on the boundary circle. We extend this theorem to bounded harmonic maps.
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Aikawa, H.: Potential-theoretic characterizations of nonsmooth domains. Bull. London Math. Soc. 36, 469–482 (2004)
Ancona, A.: Principe de Harnack à la frontière et théorème de Fatou.. dans un domaine lipschitzien Ann. Inst. Fourier 28, 169–213 (1978)
Ancona, A.: Théorie du potentiel sur les graphes et les variétés. In École d’été de Probabilités de Saint-Flour, volume 1427 of L.N. in Math., pages 1–112. Springer, 1990
Anderson, M., Schoen, R.: Positive harmonic functions on complete manifolds of negative curvature. Ann. of Math. 121, 429–461 (1985)
Armitage, D., Gardiner, S.: Classical potential theory. Springer, 2001
Aviles, P., Choi, H., Micallef, M.: Boundary behavior of harmonic maps on nonsmooth domains... J. Funct. Anal. 99, 293–331 (1991)
Benoist, Y.: Five lectures on lattices in semisimple Lie groups. In Géométries... et rigidité, volume 18 of Sém. Congr., pages 117–176. SMF, 2009
Benoist, Y., Hulin, D.: Harmonic quasi-isometric maps between rank one symmetric spaces. Ann. of Math. 185, 895–917 (2017)
Benoist, Y., Hulin, D.: Harmonic quasi-isometric maps II: negatively curved manifolds. JEMS 23, 2861–2911 (2021)
Bonk, M., Heinonen, J., Koskela, P.: Uniformizing Gromov hyperbolic spaces. Astérisque, 270, 2001
Bridson, M., Haefliger, A.: Metric spaces of non-positive curvature. Springer, 1999
Caffarelli, L., Salsa, S.: A geometric approach to free boundary problems, volume 68 of Graduate Studies in Math. Am. Math. Soc., 2005
Cheng, S.: Liouville theorem for harmonic maps. In Geometry of the Laplace operator, pages 147–151. Amer. Math. Soc., 1980
Dahlberg, B.: Estimates of harmonic measure. Arch. Rational Mech. Anal. 65, 275–288 (1977)
Eells, J., Fuglede, B.: Harmonic maps between Riemannian polyhedra. Cambridge Univ, Press (2001)
Eells, J., Sampson, J.: Harmonic mappings of Riemannian manifolds. Amer. J. Math. 86, 109–160 (1964)
Ghys, E., de la Harpe, P.: Sur les groupes hyperboliques d’après Mikhael Gromov. Progress in Mathematics, Birkhäuser (1990)
Giaquinta, M., Hildebrandt, S.: A priori estimates for harmonic mappings. J. Reine Angew. Math. 336, 124–164 (1982)
Gilbarg, D., Trudinger, N.: Elliptic partial differential equations of second order. Classics in Mathematics. Springer, 2001
Hamilton, R.: Harmonic maps of manifolds with boundary. L. N. in Math. 471. Springer, 1975
Jost, J.: Compact Riemann surfaces. Universitext, Springer (1984)
Jost, J.: Harmonic mappings between Riemannian manifolds. Proc. Centre Math. Analysis. Australian Nat. Univ., 1984
Jost, J.: Convex functionals and generalized harmonic maps into spaces of nonpositive curvature. Comment. Math. Helv. 70, 659–673 (1995)
Kemper, M., Lohkamp, J.: Potential theory on Gromov hyperbolic spaces. Anal. Geom. Metr. Spaces 10, 394–431 (2022)
Kleiner, B.: The local structure of length spaces with curvature bounded above. Math. Z. 231, 409–456 (1999)
Koosis, P.: Introduction to \(H_p\) spaces. Cambridge Univ, Press (1998)
Korevaar, N., Schoen, R.: Sobolev spaces and harmonic maps for metric space targets. Comm. Anal. Geom. 1, 561–659 (1993)
Ledrappier, F., Lim, S.: Local limit theorem in negative curvature. Duke Math. J. 170, 1585–1681 (2021)
Lemm, M., Markovic, V.: Heat flows on hyperbolic spaces. J. Differential Geom. 108, 495–529 (2018)
Li, P., Wang, J.: Complete manifolds with positive spectrum. II. J. Differential Geom. 62, 143–162 (2002)
Markovic, V.: Harmonic maps and the Schoen conjecture. J. Amer. Math. Soc. 30, 799–817 (2017)
Ontaneda, P.: Cocompact CAT(0) spaces are almost geodesically complete. Topology 44, 47–62 (2005)
Rudin, W.: Real and complex analysis. McGraw-Hill, 1987
Sidler, H., Wenger, S.: Harmonic quasi-isometric maps into Gromov hyperbolic CAT(0)-spaces. J. Differential Geom. 118, 555–572 (2021)
Tsuji, M.: Potential theory in modern function theory. Chelsea, 1975
Zhang, H.-C., Zhong, X., Zhu, X.-P.: Quantitative gradient estimates for harmonic maps into singular spaces. Sci. China Math. 62, 2371–2400 (2019)
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Benoist, Y., Hulin, D. Bounded harmonic maps. Geom Dedicata 217, 100 (2023). https://doi.org/10.1007/s10711-023-00836-5
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DOI: https://doi.org/10.1007/s10711-023-00836-5
Keywords
- Harmonic map
- Fine limit
- Fatou theorem
- Subharmonic function
- Potential theory
- Spectral gap
- Non-positive curvature