Les variétés LVM et LVMB constituent une grande famille de variétés complexes non kählériennes. Par exemple, les variétés de Hopf ou de Calabi-Eckmann peuvent être vues comme des cas particuliers de variétés LVMB. Les variétés LVM sont munies d’une action naturelle du tore compact et le quotient de cette action est un polytope simple. Ce quotient permet de nouer des liens profonds entre variétés LVM et les complexes moment-angle (étudiés par Buchstaber et Panov). Notre but est de généraliser le polytope associé à une variété LVM au cas des variétés LVMB et d’étudier les propriétés de cette généralisation. En particulier, nous montrons que l’objet obtenu appartient à une grande classe de sphères simpliciales. De plus, pour toute sphère appartenant à cette classe, on peut construire une variété LVMB ayant cette sphère pour complexe associé. On utilise ce dernier résultat pour munir une grande famille de complexe moment-angle d’une structure complexe.
LVM and LVMB manifolds are a large family of non kähler manifolds. For instance, Hopf manifolds and Calabi-Eckmann manifolds can be seen as LVMB manifolds. The LVM manifolds have a natural action of a real torus and the quotient of this action is a polytope. This quotient allows us to relate closely LVM manifolds to the moment-angle manifolds studied by Buchstaber and Panov. Our aim is to generalize the polytope associated to a LVM manifold to the LVMB case and study the properties of this generalization. In particular, we show that the object we obtain belongs to a very large class of simplicial spheres. Moreover, we show that for every sphere belonging to this class, we can construct a LVMB manifold whose associated sphere is the given sphere. We use this latter result to show that many moment-angle complexes can be endowed with a complex structure (up to product with circles).
@article{AIF_2012__62_4_1289_0,
author = {Tambour, J\'er\^ome},
title = {LVMB manifolds and simplicial spheres},
journal = {Annales de l'Institut Fourier},
volume = {62},
year = {2012},
pages = {1289-1317},
doi = {10.5802/aif.2723},
zbl = {1253.05151},
mrnumber = {3025744},
language = {en},
url = {http://dml.mathdoc.fr/item/AIF_2012__62_4_1289_0}
}
Tambour, Jérôme. LVMB manifolds and simplicial spheres. Annales de l'Institut Fourier, Tome 62 (2012) pp. 1289-1317. doi : 10.5802/aif.2723. http://gdmltest.u-ga.fr/item/AIF_2012__62_4_1289_0/
[1] Algebraic quotients. Torus actions and cohomology. The adjoint representation and the adjoint action, Encyclopaedia of Mathematical Sciences, Tome 131 (2002) (Invariant Theory and Algebraic Transformation Groups, II) | Zbl 1055.14002
[2] Open subsets of projective spaces with a good quotient by an action of a reductive group, Transform. Groups, Tome 1 (1996) no. 3, pp. 153-185 | Article | MR 1417709 | Zbl 0912.14016
[3] Variétés complexes compactes: une généralisation de la construction de Meersseman et López de Medrano-Verjovsky, Ann. Inst. Fourier (Grenoble), Tome 51 (2001) no. 5, pp. 1259-1297 | Article | Numdam | MR 1860666 | Zbl 0994.32018
[4] Real quadrics in , complex manifolds and convex polytopes, Acta Math., Tome 197 (2006) no. 1, pp. 53-127 | Article | MR 2285318 | Zbl 1157.14313
[5] Topology and geometry, Springer-Verlag, New York, Graduate Texts in Mathematics, Tome 139 (1997) (Corrected third printing of the 1993 original) | MR 1700700 | Zbl 0791.55001
[6] Torus actions and their applications in topology and combinatorics, American Mathematical Society, Providence, RI, University Lecture Series, Tome 24 (2002) | MR 1897064 | Zbl 1012.52021
[7] A class of compact, complex manifolds which are not algebraic, Ann. of Math. (2), Tome 58 (1953), pp. 494-500 | Article | MR 57539 | Zbl 0051.40304
[8] Toric Varieties, available on Cox’s website (2009)
[9] Non-Kähler manifolds and GIT-quotients, Math. Z., Tome 257 (2007) no. 4, pp. 783-797 | Article | MR 2342553 | Zbl 1167.53029
[10] Combinatorial convexity and algebraic geometry, Springer-Verlag, Graduate Texts in Mathematics, Tome 168 (1996) | MR 1418400 | Zbl 0869.52001
[11] Very good quotients of toric varieties, Real and complex singularities (São Carlos, 1998) (Chapman & Hall/CRC Res. Notes Math.) Tome 412 (2000), pp. 61-75 | MR 1715695 | Zbl 0949.14031
[12] Zur Topologie der komplexen Mannigfaltigkeiten, Studies and Essays Presented to R. Courant on his 60th Birthday, January 8, 1948, Interscience Publishers, Inc., New York (1948), pp. 167-185 | MR 23054 | Zbl 0033.02501
[13] Complex geometry, Springer-Verlag, Universitext (2005) | MR 2093043 | Zbl 1055.14001
[14] The structure of complex Lie groups, Chapman & Hall/CRC, Boca Raton, FL, Chapman & Hall/CRC Research Notes in Mathematics, Tome 429 (2002) | MR 1887930 | Zbl 0992.22005
[15] Topology of the intersection of quadrics in , Algebraic topology (Arcata, CA, 1986), Springer, Berlin (Lecture Notes in Math.) Tome 1370 (1989), pp. 280-292 | MR 1000384 | Zbl 0681.57020
[16] A new family of complex, compact, non-symplectic manifolds, Bol. Soc. Brasil. Mat. (N.S.), Tome 28 (1997) no. 2, pp. 253-269 | Article | MR 1479504 | Zbl 0901.53021
[17] A new geometric construction of compact complex manifolds in any dimension, Math. Ann., Tome 317 (2000) no. 1, pp. 79-115 | Article | MR 1760670 | Zbl 0958.32013
[18] Holomorphic principal bundles over projective toric varieties, J. Reine Angew. Math., Tome 572 (2004), pp. 57-96 | MR 2076120 | Zbl 1070.14047
[19] Nonconvex embeddings of the exceptional simplicial 3-spheres with 8 vertices, J. Combin. Theory Ser. A, Tome 98 (2002) no. 1, pp. 74-86 | Article | MR 1897925 | Zbl 1002.52012
[20] Seifert manifolds, Chapman & Hall/CRC, Boca Raton, FL, Chapman & Hall/CRC Research Notes in Mathematics, Tome 429 (2002)
[21] Complex-analytic structures on moment-angle manifolds (http://arxiv.org/abs/1008.4764v1)