English

Holomorphic differential forms of complex manifolds on commutative Banach algebras and a few related problems

Differential Geometry 2019-08-15 v9

Abstract

Let AA be a commutative Banach algebra. Let MM be a complex manifold on AA (an AA-manifold). Then, we define an AA-holomorphic vector bundle (kT)(M)(\wedge^kT^*)(M) on MM. For an open set UU of MM, ω\omega is said to be an AA-holomorphic differential kk-form on UU, if ω\omega is an AA-holomorphic section of (kT)(M)(\wedge^kT^*)(M) on UU. So, if the set of all AA-holomorphic differential kk-forms on UU is denoted by ΩMk(U)\Omega_{M}^k(U), then {ΩMk(U)}U\{\Omega_{M}^k(U)\}_{U} is a sheaf of modules on the structure sheaf OMO_M of the AA-manifold MM and the cohomology group Hl(M,ΩMk)H^l(M,\Omega_{M}^k) with the coefficient sheaf {ΩMk(U)}U\{\Omega_{M}^k(U)\}_{U} is an OM(M)O_M(M)-module and therefore, in particular, an AA-module. There is no new thing in our definition of a holomorphic differential form. However, this is necessary to get the cohomology group Hl(M,ΩMk)H^l(M,\Omega_{M}^k) as an AA-module. Furthermore, we try to define the structure sheaf of a manifold that is locally a continuous family of C\mathbb C-manifolds (and also the one of an analytic family). Directing attention to a finite family of C\mathbb C-manifolds, we mentioned the possibility that Dolbeault theorem holds for a continuous sum of C\mathbb C-manifolds. Also, we state a few related problems. One of them is the following. Let nNn\in \mathbb N. Then, does there exist a Cn\mathbb C^n-manifold NN such that for any C\mathbb C-manifolds M1,M2,,Mn1M_1, M_2, \cdots, M_{n-1} and MnM_n, NN can not be embedded in the direct product M1×M2××Mn1×MnM_1\times M_2 \times \cdots \times M_{n-1} \times M_n as a Cn\mathbb C^n-manifold ? So, we propose something that is likely to be a candidate for such a C2\mathbb C^2-manifold NN.

Keywords

Cite

@article{arxiv.1810.05829,
  title  = {Holomorphic differential forms of complex manifolds on commutative Banach algebras and a few related problems},
  author = {Hiroki Yagisita},
  journal= {arXiv preprint arXiv:1810.05829},
  year   = {2019}
}

Comments

(The revised version may have been put in) https://www.researchgate.net/profile/Hiroki_Yagisita