An analytic proof for the formula of the first order obstruction making the dimensions of Bott-Chern cohomology groups and Aeppli cohomology groups jumping
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摘要: 设X为一个紧致复流形,考虑\,$X$\,的任一复结构形变族 : X ! B ,则X的Bott-Chern上同调群和Aeppli上同调群的维数在此变化过程中可能产生跳跃现象. 在文献[1]中Schweitzer将Bott-Chern上同调群和Aeppli上同调群表示成为某一个层链 Lp,q的上同调群.在文献[2]中, 作者通过研究X各阶形变中与 Lp,q拟同构的层 链 Bp,q的超上同调群等价类元素在延拓过程中的 障碍来研究这一跳跃现象,得到了产生此障碍的公式. 本文将给出1阶障碍公式的另一个用 Lp,q上同调计算的解析证明.
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关键词:
- Bott-Chern上同调群 /
- Aeppli上同调群 /
- 复结构形变 /
- 障碍 /
- Kodaira Spencer类
Abstract: Let X be a compact complex manifold, and let : X ! B be a small deformation of X, the dimensions of the Bott-Chern cohomology groups or Aeppli cohomology groups may vary under this deformation. In [1], M. Schweitzer constructed a complex of sheaves Lp,q, and represented Bott-Chern cohomology groups or Aeppli cohomology groups as the cohomology groups of Lp,q. In [2], the author have studied this jumping phenomenon by studying the deformation obstructions of a hypercohomology class of a complex of sheaves B p,q which is quasi-isomorphic to L p,q[1]. In particular, they obtain an explicit formula for the obstructions. In this paper, the formula of the first order obstruction is proved in another way by using cohomology of L p,q.-
Key words:
- Bott-Chern cohomology /
- Aeppli cohomology /
- deformation /
- obstruction /
- kodaira spencer class
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[1] SCHWEITZER M. Autour de la cohomologie de Bott-Chern [J/OL]. arXiv:0709 3528v1, 2007[2014-03-06].http://arxiv.org/abs/0709.3528.LIN J Z, YE X M. The jumping phenomenon of the dimensions of Bott-Chern cohomology groups and Aeppli cohomology groups [J/OL]. arXiv: 1403 0285v2, 2014[2014-03-06].http://arxiv.org/abs/1403.0285.KODAIRA K. Complex manifolds and deformation of complex structures [M]. New York: Springer, 1986.VOISIN C. Hodge theory and complex algebraic geometry I [M]. London: Cambridge University Press, 2002.ANGELLA D. The cohomologies of the Iwasawa manifold and of its small deformations [J]. J Geom Anal, 2013, 23(3): 1355-1378.YE X M. The jumping phenomenon of Hodge numbers [J]. Pacific Journal of Mathematics, 2008, 235(2): 379-398.YE X M. The jumping phenomenon of the dimensions of cohomology groups of tangent sheaf [J]. Acta Mathematica Scientia, 2010, 30(5):1746-1758.VOISIN C. Symétrie miroir [M]. Paris: Société Mathématique de France, 1996.FRÖLICHER A. Relations between the cohomology groups of Dolbeault and topological invariants [J], Proc Nat Acad Sci USA, 1955: 641-644.BOTT R, CHERN S -S. Hermitian vector bundles and the equidistribution of the zeroes of their holomorphic sections [J], Acta Math, 1965: 71-112.AEPPLI A. On the cohomology structure of Stein manifolds [J], Proc Conf Complex Analysis (Minneapolis, Minn., 1964), 1965: 58-70.
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