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Transactions of the American Mathematical Society

ISSN 1088-6850(online) ISSN 0002-9947(print)



Complex structures on Riemann surfaces

Author: Garo Kiremidjian
Journal: Trans. Amer. Math. Soc. 169 (1972), 317-336
MSC: Primary 32G15; Secondary 30A46
MathSciNet review: 0310296
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Abstract: Let $ X$ be a Riemann surface (compact or noncompact) with the property that the length of every closed geodesic is bounded away from zero. Then we show that sufficiently small complex structures on $ X$ can be described without making use of Schwarzian derivatives or the theory of quasiconformal mappings. Instead, we use methods developed in Kuranishi's work on the existence of locally complete families of deformations of compact complex manifolds.

We introduce norms $ \vert\quad {\vert _k}$ ($ k$ a positive integer) on the space of $ {C^\infty }(0,p)$-forms with values in the tangent bundle on $ X$, which are similar to the usual Sobolev $ \vert\vert\quad \vert{\vert _k}$-norms. (In the compact case $ \vert\quad {\vert _k}$ is equivalent to $ \vert\vert\quad \vert{\vert _k}$.) Then we prove that certain properties of $ \vert\vert\quad \vert{\vert _k}$, crucial for Kuranishi's approach, are also satisfied by $ \vert\quad {\vert _k}$.

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Keywords: Complex manifold, Riemann surface, almost complex and complex structures, deformations of complex structures, holomorphic vector bundles, Laplace operator, $ {W^{p,q}}$-ellipticity, Green's operator, $ k$-norms
Article copyright: © Copyright 1972 American Mathematical Society