Riv. Mat. Univ. Parma, Vol. 13, No. 2, 2022

Andrea Cattaneo [a]

Almost complex manifolds from the point of view of Kodaira dimension

Pages: 535-549
Received: 6 December 2021
Accepted in revised form: 11 May 2022
Mathematics Subject Classification: 32Q60.
Keywords: Kodaira dimension, almost complex manifold, meromorphic function.
Author address:
[a]: Università di Parma, Dipartimento di Scienze Matematiche Fisiche e Informatiche, Unità di Matematica e Informatica, Parma, Italy

The author is a member of GNSAGA of INdAM.

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Abstract: In complex geometry a classical and useful invariant of a complex manifold is its Kodaira dimension. Since its introduction by Iitaka in the early 70's, its behavior under deformations was object of study and it is known that Kodaira dimension is invariant under holomorphic deformations for smooth projective manifolds, while there are examples of holomorphic deformations of non-projective manifolds for which the Kodaira dimension is non-constant. Recently this concept has been generalized to almost complex manifolds, we want to present here some of its main features in the non-integrable case, mainly with respect to deformations. At the end we conclude with some speculations on the theory of meromorphic functions on almost complex manifolds.

References
[1]
A. Cattaneo, A. Nannicini and A. Tomassini, Kodaira dimension of almost Kähler manifolds and curvature of the canonical connection, Ann. Mat. Pura Appl. (4) 199 (2020), no. 5, 1815-1842. MR4142851
[2]
A. Cattaneo, A. Nannicini and A. Tomassini, On Kodaira dimension of almost complex \(4\)-dimensional solvmanifolds without complex structures, Internat. J. Math. 32 (2021), no. 10, Paper No. 2150075, 41 pp. MR4311717
[3]
H. Chen and W. Zhang, Kodaira dimensions of almost complex manifolds I, Amer. J. Math., to appear.
[4]
H. Chen and W. Zhang, Kodaira dimensions of almost complex manifolds II, arXiv:2004.12825v1 [math.DG] , preprint, 2020. DOI
[5]
P. de Bartolomeis and G. Tian, Stability of complex vector bundles, J. Differential Geom. 43 (1996), no. 2, 231-275. MR1424426
[6]
P. de Bartolomeis and A. Tomassini, On the Maslov index of Lagrangian submanifolds of generalized Calabi-Yau manifolds, Internat. J. Math. 17 (2006), no. 8, 921-947. MR2261641
[7]
A. Grothendieck, Éléments de géométrie algébrique. IV. Étude locale des schémas et des morphismes de schémas IV, Inst. Hautes Études Sci. Publ. Math. no. 32 (1967), 361 pp. MR0238860
[8]
S. Iitaka, Deformations of compact complex surfaces. II, J. Math. Soc. Japan 22 (1970), 247-261. MR0261639
[9]
S. Iitaka, On \(D\)-dimensions of algebraic varieties, J. Math. Soc. Japan 23 (1971), 356-373. MR0285531
[10]
K. Kodaira, On the structure of compact complex analytic surfaces. I, Amer. J. Math. 86 (1964), 751-798. MR0187255
[11]
J. Morrow and K. Kodaira, Complex manifolds, Reprint of the 1971 edition with errata, AMS Chelsea Publishing, Providence, RI, 2006. MR2214741
[12]
I. Nakamura, Complex parallelisable manifolds and their small deformations, J. Differential Geometry 10 (1975), 85-112. MR0393580
[13]
Y.-T. Siu, Extension of twisted pluricanonical sections with plurisubharmonic weight and invariance of semipositively twisted plurigenera for manifolds not necessarily of general type, in ''Complex geometry'' (Göttingen, 2000), Springer, Berlin, 2002, 223-277. MR1922108
[14]
W. P. Thurston, Some simple examples of symplectic manifolds, Proc. Amer. Math. Soc. 55 (1976), no. 2, 467-468. MR0402764


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