REFERENCES
- J. Cheeger, T. H. Colding, W. P. Minicozzi, Linear growth harmonic functions on complete manifolds with nonnegative Ricci curvature, Geom. Funct. Anal. 5 (1995) 948–954.
- B. Chow, P. Lu, L. Ni, Hamilton's Ricci Flow. Graduate Studies in Mathematics, Vol 77, American Mathematical Society, Science Press, New York, 2006.
- P. Li, L.-F. Tam, Linear growth harmonic functions on a complete manifold, J. Differential Geom. 29 (1989) 421–425.
- L. Ni, L.-F. Tam, Plurisubharmonic functions and the structure of complete Kahler manifolds with nonnegative curvature, J. Differential Geom. 64 (2003) 457–524.
- D. Gilbarg, N. S. Trudinger, Elliptic Partial Differential Equations of Second Order. Reprint of the 1998 edition. Classics in Mathematics, Springer-Verlag, Berlin, 2001.
- R. E. Greene, H. Wu, Function Theory on Manifolds which Possess a Pole. Lecture Notes in Mathematics, Vol 699, Springer, Berlin, 1979.
- J. Milnor, On deciding whether a surface is parabolic or hyperbolic, Amer. Math. Monthly 84 (1977) 43–46.
- M. H. Protter, H. F. Weinberger, Maximum Principles in Differential Equations. Prentice-Hall, Englewood Cliffs, NJ, 1967.
- E. Nelson, A proof of Liouville's theorem, Proc. Amer. Math. Soc. 12 (1961) 995.
- S.-T. Yau, Harmonic functions on complete Riemannian manifolds, Comm. Pure Appl. Math. 28 (1975) 201–228.