Abstract
Let \(F\) be a proper rational map from the complex ball \(\mathbb B ^n\) into \(\mathbb B ^N\) with \(n>7\) and \(3n+1 \le N\le 4n-7\). Then \(F\) is equivalent to a map \((G, 0, \dots , 0)\) where \(G\) is a proper holomorphic map from \(\mathbb B ^n\) into \(\mathbb B ^{3n}\).
Similar content being viewed by others
References
Alexander, H.: Proper holomorphic mappings in \({\bf C}^n\). Indiana Univ. Math. J. 26, 137–146 (1977)
Baouendi, M.S., Ebenfelt, P., Rothschild, L.P.: Real submanifolds in complex space and their mappings. In: Princeton Mathematical Series, vol. 47. Princeton University Press, Princeton (1999)
Baouendi, M.S., Huang, X., Rothschild, L.: Regularity of CR mappings between algebraic hypersurfaces. Invent. Math. 125, 13–36 (1996)
Cao, H., Mok, N.: Holomorphic immersions between compact hyperbolic space forms. Invent. Math. 100, 49–61 (1990)
Catlin, D., D’Angelo, J.: A stabilization theorem for Hermitian forms and applications to holomorphic mappings. Math Res. Lett. 3, 149–166 (1996)
Cima, J., Suffridge, T.J.: A reflection principle with applications to proper holomorphic mappings. Math Ann. 265, 489–500 (1983)
Cima, J., Suffridge, T.J.: Boundary behavior of rational proper maps. Duke Math. J. 60, 135–138 (1990)
D’Angelo, J.P.: Several Complex Variables and the Geometry of Real Hypersurfaces. CRC Press, Boca Raton (1993)
D’Angelo, J.P., Lebl, J.: Complexity results for CR mappings between spheres. Int. J. Math. 20(2), 149–166 (2009)
D’Angelo, J.P., Kos, S., Riehl, E.: A sharp bound for the degree of proper monomial mappings between balls. J. Geom. Anal. 13(4), 581–593 (2003)
Faran, J.: Maps from the two ball to the three ball. Invent. Math. 68, 441–475 (1982)
Faran, J.: On the linearity of proper holomorphic maps between balls in the low codimensional case. J. Diff. Geom. 24, 15–17 (1986)
Faran, J., Huang, X., Ji, S., Zhang, Y.: Polynomial and rational maps between balls. Pure Appl. Math. Quart 6(3), 829–842 (2010)
Forstneric, F.: Extending proper holomorphic mappings of positive codimension. Invent. Math. 95(1), 31–62 (1989)
Forstneric, F.: A survey on proper holomorphic mappings. In: Proceeding of Year in SCVs at Mittag-Leffler Institute, Math. Notes 38. Princeton University Press, Princeton (1992)
Hakim, M., Sibony, N.: Fonctions holomorphes bornées sur la boule unité de \({\bf C}^{n}\). Invent. Math. 67(2), 213–222 (1982)
Hamada, H.: Rational proper holomorphic maps from \({ B}^n\) into \({ B}^{2n}\)‘. Math. Ann. 331(no.3), 693–711 (2005)
Huang, X.: On a linearity problem for proper holomorphic maps between balls in complex spaces of different dimensions. J. Differ. Geom. 51, 13–33 (1999)
Huang, X.: On a semi-rigidity property for holomorphic maps. Asian J. Math. 7(4): 463–492 (2003) (A special issue in honor of Professor Y-T Siu’s 60th birthday)
Huang, X.: On some problems in several complex variables and Cauchy-Riemann Geometry. In: Yau, S. T., Yang L. (eds.) Proceedings of the first ICCM, December, 1998. AMS/IP Studies in Advanced Mathematics, vol. 20, pp. 383–396 (2001) (http://www.math.rutgers.edu/~huangx/iccm1998.pdf)
Huang, X., Ji, S.: Mapping \({ B}^n\) into \({\mathbb{B}}^{2n-1}\). Invent. Math. 145(no. 2), 219–250 (2001)
Huang, X., Ji, S., Xu, D.: A new gap phenomenon for proper holomorphic mappings from \(\mathbb{B}^n\) to \(\mathbb{B}^N\). Math Res. Lett. 3(4), 515–529 (2006)
Huang, X., Ji, S., Xu, D.: Several results for holomorphic mappings from \({\mathbb{B}}^n\) into \({\mathbb{B}}^N\). Geometric analysis of PDE and several complex variables, 267292, Contemp. Math., 368. Am. Math. Soc., Providence (2005)
Huang,X., Ji, S., Yin, W.: Recent progress on two problems in several complex variables. In: Proceedings of International Congress of Chinese Mathematicians 2007, vol. I, pp. 563–575. International Press (2009) (http://www.math.rutgers.edu/~huangx/iccm2007.pdf)
Lamel, B., Mir, N.: Parametrization of local CR automorphisms by finite jets and applications. J. Am. Math. Soc. 20(2), 519–572 (2007)
Lebl, J., Peters, H.: Polynomials constant on a hyperplane and CR maps of spheres. Ill. J. Math. (2013, to appear)
Low, E.: Embeddings and proper holomorphic maps of strictly pseudoconvex domains into polydiscs and balls. Math Z. 190(3), 401–410 (1985)
Meylan, F., Mir, N., Zaitsev, D.: Holomorphic extension of smooth CR-mappings between real-analytic and real-algebraic CR-manifolds. Asian J. Math. 7(4), 493–509 (2003)
Mir, N.: Analytic regularity of CR maps into spheres. Math. Res. Lett. 10(4), 447–457 (2003)
Mok, N.: Metric rigidity theorems on Hermitian locally symmetric manifolds. In: Series in Pure Mathematics, vol. 6. World Scientific Publishing Co., Inc., Teaneck (1989)
Poincaré, H.: Les fonctions analytiques de deux variables et la représentation conforme. Ren. Cire. Mat. Palermo, II. Ser. 23, 185–220 (1907)
Putinar, M.: Sums of Hermitian squares: old and new. In: Bleckherman, G., Parrilo, P., Thomas, R. (eds.) Semidefinite optimization and convex algebraic geometry. SIAM, Philadelphia (2013, to appear)
Quillen, D.G.: On the representation of hermitian forms as sums of squares. Invent. Math. 5, 237–242 (1968)
Stensones, B.: Proper maps which are Lipschitz \(\alpha \) up to the boundary. J. Geom. Anal. 6(2), 317–390 (1996)
Webster, S.: On mapping an \(n\)-ball into an (n+1)-ball in the complex space. Pac. J. Math. 81, 267–272 (1979)
Acknowledgments
The major part of the paper was completed when the first two authors were visiting the School of Mathematics and Statistics, Wuhan University, in the summer of 2009. These two authors would like to express their gratitude to this institute for the hospitality during this visit.
Author information
Authors and Affiliations
Corresponding author
Additional information
Xiaojun Huang is Supported in part by DMS-1101481.
Wanke Yin is Supported in part by FANEDD-201117, ANR-09-BLAN-0422, RFDP-20090141120010, NSFC-10901123 and NSFC-11271291.
Rights and permissions
About this article
Cite this article
Huang, X., Ji, S. & Yin, W. On the third gap for proper holomorphic maps between balls. Math. Ann. 358, 115–142 (2014). https://doi.org/10.1007/s00208-013-0952-z
Received:
Revised:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s00208-013-0952-z