Wang, Huan (2016). On the Growth of Dimension of Harmonic Spaces of Semipositive Line Bundles over Manifolds. PhD thesis, Universität zu Köln.
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Abstract
This thesis consists of six parts. In the first part, we give a general introduction of our topics. In the second part, we study the harmonic space of line bundle valued forms over a covering manifold with a discrete group action, and obtain an asymptotic estimate for the von Neumann dimension of the space of harmonic $(n,q)$-forms with values in high tensor powers of a semipositive line bundle. In particular, we estimate the von Neumann dimension of the corresponding reduced $L^2$-Dolbeault cohomology group. The main tool is a local estimate of the pointwise norm of harmonic forms with values in semipositive line bundles over Hermitian manifolds. In the third part, we study the holomorphic extension problem of smooth forms with values in holomorphic vector bundles from the boundary of a pseudo-concave domain, which is in a compact Hermitian manifold associated with a holomorphic line bundle. We prove the existence of the meromorphic extension of $\ddbar_b$-closed $(n,q+1)$-forms with values in holomorphic vector bundles, when the domain is $q$-concave and the line bundle is semi-positive everywhere and positive at one point. In the fourth part, we study the $L^2$ holomorphic functions on hyperconcave ends and prove that the dimension of the space of $L^2$ holomorphic functions on hyperconcave ends is infinite. The main tool is the construction of $L^2$-peak functions at boundary points by using the solution of $\ddbar$-Neumann problem of Kohn and the compactification theorem of Marinescu-Dinh. In the fifth part, we give a remark on the Bergman kernel of symmetric tensor power of trivial vector bundles on compact Hermitian manifold by the Theorem of Le Potier. In the last part, we study the $\ddbar$-equation on $\C^n$ with growing weights, and generalize a related result of Hedenmalm on $\C$.
Item Type: | Thesis (PhD thesis) | ||||||||||||||
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URN: | urn:nbn:de:hbz:38-68551 | ||||||||||||||
Date: | 8 May 2016 | ||||||||||||||
Language: | English | ||||||||||||||
Faculty: | Faculty of Mathematics and Natural Sciences | ||||||||||||||
Divisions: | Faculty of Mathematics and Natural Sciences > Department of Mathematics and Computer Science > Mathematical Institute | ||||||||||||||
Subjects: | Natural sciences and mathematics Mathematics |
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Date of oral exam: | 28 June 2016 | ||||||||||||||
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Funders: | China Scholarship Council | ||||||||||||||
Refereed: | Yes | ||||||||||||||
URI: | http://kups.ub.uni-koeln.de/id/eprint/6857 |
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