Abstract
Asymptotically harmonic manifolds are simply connected complete Riemannian manifolds without conjugate points such that all horospheres have the same constant mean curvature \(h\). In this article we present results for harmonic functions on rank one asymptotically harmonic manifolds \(X\) with mild curvature boundedness conditions. Our main results are (a) the explicit calculation of the Radon–Nikodym derivative of the visibility measures, (b) an explicit integral representation for the solution of the Dirichlet problem at infinity in terms of these visibility measures, and (c) a result on horospherical means of bounded eigenfunctions implying that these eigenfunctions do not admit non-trivial continuous extensions to the geometric compactification \(\overline{X}\).
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Ancona, A.: Positive harmonic functions and hyperbolicity, In: J. Král et al. (eds.) Potential Theory-Surveys and Problems (Prague, 1987). Lecture Notes in Mathematics, vol. 1344, pp. 1–23. Springer, Berlin (1988)
Ancona, A.: Théorie du potentiel sur les graphes et les variétés, In: École d’été de Probabilités de Saint-Flour XVIII–1988. Lecture Notes in Mathematics, vol. 1427, pp. 1–112. Springer, Berlin (1990)
Ballmann, W., Brin, M., Eberlein, P.: Structure of manifolds of nonpositive curvature I. Ann. Math. 122(1), 171–203 (1985)
Ballmann, W.: On the Dirichlet problem at infinity for manifolds of nonpositive curvature. Forum Math. 1(2), 201–213 (1989)
Buyalo, S., Schroeder, V.: Elements of Asymptotic Geometry. European Mathematical Society (EMS), Zürich (2007)
Castillon, P., Sambusetti, A.: On asymptotically harmonic manifolds of negative curvature. Math. Z. doi:10.1007/s00209-014-1293-7, 18 March 2014. See also arXiv:1203.2482, 12 March (2012)
Coornaert, M., Delzant, T., Papadopoulos, A.: Géométrie et théorie des groupes. In: Lecture Notes in Mathematics, vol. 1441. Springer, Berlin (1990)
Eberlein, P., O’Neill, B.: Visibility manifolds. Pac. J. Math. 46, 45–109 (1973)
Friedrich, Th: Die Fisher-Information und symplektische Strukturen. Math. Nachr. 153, 273–296 (1991)
Itoh, M., Satoh, H.: Information geometry of Poisson kernels on Damek–Ricci spaces. Tokyo J. Math. 33, 129–144 (2010)
Itoh, M., Satoh, H.: Fisher information geometry, Poisson kernel and asymptotical harmonicity. Differ. Geom. Appl. 29(suppl. 1), S107–S115 (2011)
Karp, L., Peyerimhoff, N.: Horospherical means and uniform distribution of curves of constant geodesic curvature. Math. Z. 231, 655–677 (1999)
Knieper, G.: Dynamics, hyperbolic, geometry, Riemannian, In: Hasselblatt, B., Katok, A. (eds.) Handbook of Dynamical Systems, vol. 1A, pp. 453–545. Elsevier, Amsterdam (2002)
Knieper, G.: New results on noncompact harmonic manifolds. Comment. Math. Helv. 87, 669–703 (2012). arXiv:0910.3872, 20 October (2009)
Knieper, G., Peyerimhoff, N.: Noncompact harmonic manifolds. Oberwolfach Preprint OWP 2013–08. arXiv:1302.3841, 15 February (2013)
Knieper, G., Peyerimhoff, N.: Geometric properties of rank one asymptotically harmonic manifolds. J. Differ. Geom. (2014) (To appear) arXiv:1307.0629, 7 January (2014)
Ledrappier, F.: Harmonic measures and Bowen–Margulis measures. Israel J. Math. 71(3), 275–287 (1990)
Peyerimhoff, N., Samiou, E.: Integral geometric properties of non-compact harmonic spaces. J. Geom. Anal. 25(1), 122–148 (2015)
Rouvière, F.: Espaces de Damek–Ricci, géometrie et analyse. Séminaires & Congrès 7, 45–100 (2003)
Yau, S.T.: Harmonic functions on complete Riemannian manifolds. Comm. Pure Appl. Math. 28, 201–228 (1975)
Zimmer, A.M.: Compact asymptotically harmonic manifolds. J. Mod. Dyn. 6(3), 377–403. arXiv:1205.2271, 16 October (2012)
Zimmer, A.M.: Boundaries of non-compact harmonic manifolds. Geom. Dedicata 168, 339–357 (2014). arXiv:1208.4802, 16 December (2012)
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Knieper, G., Peyerimhoff, N. Harmonic Functions on Rank One Asymptotically Harmonic Manifolds. J Geom Anal 26, 750–781 (2016). https://doi.org/10.1007/s12220-015-9570-1
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DOI: https://doi.org/10.1007/s12220-015-9570-1
Keywords
- Asymptotically harmonic manifolds
- Harmonic functions
- Visibility measures
- Gromov hyperbolicity
- Dirichlet problem at infinity
- Mean value property at infinity