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Functions with finite Dirichlet sum of order p and quasi-monomorphisms of infinite graphs

Published online by Cambridge University Press:  11 January 2016

Tae Hattori
Affiliation:
Ishikawa National College of Technology, Tsubata Kahoku-gun, Ishikawa, 929-0329, Japan
Atsushi Kasue
Affiliation:
Department of Mathematics, Kanazawa University, Kanazawa, Ishikawa, 920-1192, Japan
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Abstract

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In this paper, we study some potential theoretic properties of connected infinite networks and then investigate the space of p-Dirichlet finite functions on connected infinite graphs, via quasi-monomorphisms. A main result shows that if a connected infinite graph of bounded degrees possesses a quasi-monomorphism into the hyperbolic space form of dimension n and it is not p-parabolic for p > n - 1, then it admits a lot of p-harmonic functions with finite Dirichlet sum of order p.

Keywords

Type
Research Article
Copyright
Copyright © Editorial Board of Nagoya Mathematical Journal 2012

References

[1] Adams, R. A., Sobolev Spaces, Academic Press, New York, 1975.Google Scholar
[2] Amghibech, S., Eigenvalues of the discrete p-Laplacian for graphs, Ars Combin. 67 (2003), 283302.Google Scholar
[3] Anderson, M. T., “ L harmonic forms on complete Riemannian manifolds” in Geometry and Analysis on Manifolds (Katata/Kyoto, 1987), Lecture Notes in Math. 1339, Springer, Berlin, 1988, 119.Google Scholar
[4] Benjamini, I. and Schramm, O., Harmonic functions on planar and almost planar graphs and manifolds, via circle packings, Invent. Math. 126 (1996), 565587.Google Scholar
[5] Benjamini, I. and Schramm, O., Every graph with a positive Cheeger constant contains a tree with a positive Cheeger constant, Geom. Funct. Anal. 7 (1997), 403419.Google Scholar
[6] Benjamini, I. and Schramm, O., Lack of sphere packing of graphs via non-linear potential theory, arXiv:0910.3071v2 [math.MG] Google Scholar
[7] Bonk, M., Heinonen, J., and Koskela, P., Uniformizing Gromov Hyperbolic Spaces, Astérisque 270, Soc. Math. France, Paris, 2001.Google Scholar
[8] Bonk, M. and Schramm, O., Embeddings of Gromov hyperbolic spaces, Geom. Funct. Anal. 10 (2000), 266306.Google Scholar
[9] Bourdon, M. and Pajot, H., Cohomologie lp et espaces de Besov, J. Reine Angew. Math. 558 (2003), 85108.Google Scholar
[10] Buckley, S. M. and Kokkendorff, S. L., Warped products and conformal boundaries of CAT(0)-spaces, J. Geom. Anal. 18 (2008), 704719.Google Scholar
[11] Buyalo, S. and Schroeder, V., Elements of Asymptotic Geometry, EMS Monogr. Math., European Math. Soc., Zurich, 2007.Google Scholar
[12] Cao, J., Cheeger isoperimetric constants of Gromov-hyperbolic spaces with quasi-poles, Commun. Contemp. Math. 2 (2000), 511533.Google Scholar
[13] Cartwright, D. I., Soardi, P. M., and Woess, W., Martin and end compactifications for non-locally finite graphs, Trans. Amer. Math. Soc. 338, no. 2 (1993), 679693.Google Scholar
[14] Coulhon, T. and Koskela, P., Geometric interpretations of Lp-Poincaré inequalities on graphs with polynomial volume growth, Milan J. Math. 72 (2004), 209248.Google Scholar
[15] Doyle, P. G. and Snell, J. L., Random Walks and Electric Networks, Carus Math. Monogr. 22, Math. Assoc. America, Washington, DC, 1984.Google Scholar
[16] Duffin, R. J., The extremal length of a network, J. Math. Anal. Appl. 5 (1962), 200215.Google Scholar
[17] Gol’dshtein, V. and Troyanov, M., The Kelvin-Nevanlinna-Royden criterion for p-parabolicity, Math. Z. 232 (1999), 607619.Google Scholar
[18] Hattori, T. and Kasue, A., Dirichlet finite harmonic functions and points at infinity of graphs and manifolds, Proc. Japan Acad. Ser. A Math. Sci. 83 (2007), 129134.Google Scholar
[19] Hattori, T. and Kasue, A., “Functions of finite Dirichlet sums and compactifications of infinite graphs” in Probabilistic Approach to Geometry (Kyoto, 2008), Adv. Stud. Pure Math. 57, Math. Soc. Japan, Tokyo, 2010, 141153.Google Scholar
[20] Holopainen, I., Rough isometries and p-harmonic functions with finite Dirichlet integral, Rev. Mat. Iberoam. 10 (1994), 143176.Google Scholar
[21] Holopainen, I. and Soardi, P. M., p-Harmonic functions on graphs and manifolds, Manuscripta Math. 94 (1997), 95110.CrossRefGoogle Scholar
[22] Kanai, M., Rough isometries, and combinatorial approximations of geometries of non-compact Riemannian manifolds, J. Math. Soc. Japan 37 (1985), 391413.Google Scholar
[23] Kanai, M., “Analytic inequalities, and rough isometries between noncompact Riemannian manifolds” in Curvature and Topology of Riemannian Manifolds (Katata, 1985), Lecture Notes in Math. 1201, Springer, Berlin, 1986, 122137.Google Scholar
[24] Kassi, M., A Liouville theorem for F-harmonic maps with finite F-energy, Electron. J. Differential Equations 2006, no. 15.Google Scholar
[25] Kasue, A., Convergence of metric graphs and energy forms, Rev. Mat. Iberoam. 26 (2010), 367448.Google Scholar
[26] Kasue, A., Random walks and Kuramochi boundaries of infinite networks, preprint, 2011.Google Scholar
[27] Kayano, T. and Yamasaki, M., Boundary limit of discrete Dirichlet potentials, Hiroshima Math. J. 14 (1984), 401406.Google Scholar
[28] Murakami, A. and Yamasaki, M., Nonlinear potentials on an infinite network, Mem. Fac. Sci. Shimane Univ. 26 (1992), 1528.Google Scholar
[29] Murakami, A. and Yamasaki, M., “Nonlinear Kuramochi boundaries of infinite networks” in Potential Theory and Related Fields (Kyoto, 1997), Research Inst. Math. Sci., Kyoto, 1997, 8593.Google Scholar
[30] Nakamura, T. and Yamasaki, M., Generalized extremal length of an infinite network, Hiroshima Math. J. 6 (1976), 95111.Google Scholar
[31] Pansu, P., “Cohomologie Lp des variétés à courbure négative, cas du degré 1” in Conference on Partial Differential Equations and Geometry (Turin, 1988), Levrotto & Bella, Turin, 1990, 95120.Google Scholar
[32] Pansu, P., Difféomorphismes de p-dilatation bornée, Anal. Acad. Sci. Fenn. Math. 22 (1997), 475506.Google Scholar
[33] Saloff-Coste, L., On global Sobolev inequalities, Forum Math. 6 (1994), 271286.Google Scholar
[34] Saloff-Coste, L., “Analysis on Riemannian co-compact covers” in Surveys in Differential Geometry, IX, International Press, Somerville, Mass., 2004, 351384.Google Scholar
[35] Soardi, P. M., Potential Theory on Infinite Networks, Lecture Notes in Math. 1590, Springer, Berlin, 1994.Google Scholar
[36] Tanaka, H., “Kuramochi boundaries of Riemannian manifolds” in Potential Theory (Nagoya, 1990), de Gruyter, Berlin, 1992, 321329.Google Scholar
[37] Tessera, R., Vanishing of the first reduced cohomology with values in an Lprepresentation, Ann. Inst. Fourier (Grenoble) 59 (2009), 851876.Google Scholar
[38] Yamasaki, M., Parabolic and hyperbolic infinite networks, Hiroshima Math. J. 7 (1977), 135146.Google Scholar
[39] Yamasaki, M., Ideal boundary limit of discrete Dirichlet functions, Hiroshima Math. J. 16 (1986), 353360.Google Scholar
[40] Yamasaki, M., Discrete Dirichlet potentials on an infinite network, RIMS Kôkyûroku, Bessatsu 610 (1987), 5166.Google Scholar