Abstract
We give a complete characterization of those disk bundles over surfaces which embed as rationally convex strictly pseudoconvex domains in \(\mathbb {C}^2\). We recall some classical obstructions and prove some deeper ones related to symplectic and contact topology. We explain the close connection to Lagrangian surfaces with isolated singularities and develop techniques for constructing such surfaces. Our proof also gives a complete characterization of Lagrangian surfaces with open Whitney umbrellas, answering a question first posed by Givental in 1986.
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Notes
In the terminology of Cieliebak–Eliashberg, the closure of a smoothly bounded strictly pseudoconvex domain is called an \(i\) -convex domain, and a strictly plurisubharmonic function is called an i-convex function. In this paper, “domain” means open connected set.
We reserve the term knot for links with a single connected component.
The sign discrepancy arises because, for an oriented Lagrangian plane \(P \subset \mathbb {C}^2\), we have \(P \oplus iP = \mathbb {C}^2\), but the induced orientation on \(P \oplus iP\) as a direct sum is the opposite of the orientation on \(\mathbb {C}^2\) as a complex vector space.
References
Abouzaid, M, Seidel, P.: Altering symplectic manifolds by homologous recombination (2010). arXiv:1007.3281
Akbulut, S., Matveyev, R.: Exotic structures and adjunction inequality. Turkish J. Math. 21, 47–53 (1997)
Audin, M.: Quelques remarques sur les surfaces lagrangiennes de Givental. J. Geom. Phys. 7, 583–598 (1990)
Castro, I., Lerma, A.M.: Hamiltonian stationary self-similar solutions for Lagrangian mean curvature flow in the complex Euclidean plane. Proc. Am. Math. Soc. 138, 1821–1832 (2010)
Chantraine, B.: Lagrangian concordance of Legendrian knots. Algebr. Geom. Topol. 10, 63–85 (2010)
Cieliebak, K., Eliashberg, Y.: From Stein to Weinstein and Back: Symplectic Geometry of Affine Complex Manifolds. American Mathematical Society, Providence, RI (2012)
Cieliebak, K., Eliashberg, Y.: The topology of rationally and polynomially convex domains. Invent. Math. 199, 215–238 (2015)
Duval, J., Sibony, N.: Polynomial convexity, rational convexity, and currents. Duke Math. J. 79, 487–513 (1995)
Ekholm, T.: Rational SFT, linearized legendrian contact homology, and lagrangian floer cohomology. In: Perspectives in Analysis, Geometry, and Topology. Progress in Mathematics, vol. 296, pp. 109–145. Springer, New York (2012)
Ekholm, T., Honda, K., Kálmán, T.: Legendrian knots and exact Lagrangian cobordisms (2012). arXiv:1212.1519
Eliashberg, Y.: Topological characterization of Stein manifolds of dimension > 2. Int. J. Math. 1, 29–46 (1990)
Eliashberg, Y., Fraser, M.: Topologically trivial Legendrian knots. J. Symplectic Geom. 7, 77–127 (2009)
Eliashberg, Y., Murphy, E.: Lagrangian caps. Geom. Funct. Anal. 23, 1483–1514 (2013)
Eliashberg, Y., Gromov, M.: Lagrangian intersection theory: finite-dimensional approach. Transl. Am. Math. Soc. Ser. 2(186), 27–118 (1998)
Etnyre, J.B.: Legendrian and Transversal Knots. Handbook of Knot Theory. pp. 105–185. Elsevier, Amsterdam (2005)
Forstnerič, F.: Complex tangents of real surfaces in complex surfaces. Duke Math. J. 67, 353–376 (1992)
Forstnerič, F.: Stein domains in complex surfaces. J. Geom. Anal. 13, 77–94 (2003)
Forstnerič, F.: Stein Manifolds and Holomorphic Mappings: The Homotopy Principle in Complex Analysis. In: Ergebnisse der Mathematik und ihrer Grenzgebiete, 3. Folge, vol. 56. Springer, Berlin, New York (2011)
Ghiggini, P., Lisca, P., Stipsicz, A.: Tight contact structures on some small Seifert fibered 3-manifolds. Am. J. Math. 129, 1403–1447 (2007)
Giroux, E.: Une infinité de structures de contact tendues sur une infinité de variétés. Invent. Math. 135, 789–802 (1999)
Givental, A.: Lagrangian imbeddings of surfaces and unfolded Whitney umbrella. Funct. Anal. Appl. 20, 197–203 (1986)
Gromov, M.: Pseudo holomorphic curves in symplectic manifolds. Invent. Math. 82, 307–347 (1985)
Honda, K.: On the classification of tight contact structures II. J. Differ. Geom. 55, 83–143 (2000)
Eliashberg, Y.: Unique holomorphically fillable contact structure on the 3-torus. Int. Math. Res. Notices 1996(2), 77–82 (1996)
Johns, J.: Morse-Bott handle attachments and plumbing (2009). http://www.cims.nyu.edu/~jjohns/MorseBottHandlesB.pdf
Kanda, Y.: The classification of tight contact structures on the 3-torus. Commun. Anal. Geom. 5, 413–438 (1997)
Lai, H.F.: Characteristic classes of real manifolds immersed in complex manifolds. Trans. Am. Math. Soc. 172, 1–33 (1972)
Lin, F.: Exact Lagrangian caps of Legendrian knots (2013). arXiv:1309.5101
Lisca, P., Matić, G.: Tight contact structures and Seiberg–Witten invariants. Invent. Math. 129, 509–525 (1997)
Massey, W.: Proof of a conjecture of Whitney. Pac. J. Math. 31, 143–156 (1969)
McDuff, D.: The structure of rational and ruled symplectic 4-manifolds. J. Am. Math. Soc. 3, 679–712 (1990)
McDuff, D.: Symplectic manifolds with contact type boundaries. Invent. Math. 103, 651–671 (1991)
McDuff, D., Salamon, D.: J-Holomorphic Curves and Symplectic Topology. American Mathematical Society, Providence, RI (2012)
Murphy, E.: Loose Legendrian embeddings in high dimensional contact manifolds (2012). arXiv:1201.2245
Nemirovski, S.: Complex analysis and differential topology on complex surfaces. Russ. Math. Surv. 54, 729–752 (1999)
Nemirovski, S.: Adjunction inequality and coverings of Stein surfaces. Turk. J. Math. 27, 161–172 (2003)
Nemirovski, S.: Finite unions of balls in \({\mathbb{C}}^{n}\) are rationally convex. Russ. Math. Surv. 63, 381–382 (2008)
Nemirovski, S.: Lagrangian Klein bottles in \({\mathbb{R}}^{2n}\). Geom. Funct. Anal. 19, 902–909 (2009)
Neumann, W.D.: A calculus for plumbing applied to the topology of complex surface singularities and degenerating complex curves. Trans. Am. Math. Soc. 268, 299–344 (1981)
Ozbagci, B., András, B.S.: Surgery on Contact 3-Manifolds and Stein Surfaces. Springer, New York (2004)
Shevchishin, V.V.: Lagrangian embeddings of the Klein bottle and combinatorial properties of mapping class groups. Izvestiya: Mathematics 73, 797–859 (2009)
Stout, E.L.: Polynomial Convexity. Birkhäuser, Boston (2007)
Acknowledgments
We would like to thank Yasha Eliashberg for suggesting this problem and for numerous informative discussions. We also thank Roger Casals and Emmy Murphy for enlightening conversations regarding Sect. 5.
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The first author was partially supported by DFG project SFB/TR-12 and RFBR Grant 14-01-00709-a. The second author was partially supported by NSF Grant DGE-114747.
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Nemirovski, S., Siegel, K. Rationally convex domains and singular Lagrangian surfaces in \(\mathbb {C}^2\) . Invent. math. 203, 333–358 (2016). https://doi.org/10.1007/s00222-015-0598-4
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DOI: https://doi.org/10.1007/s00222-015-0598-4