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AuthorSario, L. author
TitleClassification Theory of Riemann Surfaces [electronic resource] / by L. Sario, M. Nakai
ImprintBerlin, Heidelberg : Springer Berlin Heidelberg : Imprint: Springer, 1970
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Descript XX, 450 p. online resource


The purpose of the present monograph is to systematically develop a classification theory of Riemann surfaces. Some first steps will also be taken toward a classification of Riemannian spaces. Four phases can be distinguished in the chronological background: the type problem; general classification; compactifications; and extension to higher dimensions. The type problem evolved in the following somewhat overlapping steps: the Riemann mapping theorem, the classical type problem, and the existence of Green's functions. The Riemann mapping theorem laid the foundation to classification theory: there are only two conformal equivalence classes of (noncompact) simply connected regions. Over half a century of efforts by leading mathematicians went into giving a rigorous proof of the theorem: RIEMANN, WEIERSTRASS, SCHWARZ, NEUMANN, POINCARE, HILBERT, WEYL, COURANT, OSGOOD, KOEBE, CARATHEODORY, MONTEL. The classical type problem was to determine whether a given simply connected covering surface of the plane is conformally equivalent to the plane or the disko The problem was in the center of interest in the thirties and early forties, with AHLFORS, KAKUTANI, KOBAYASHI, P. MYRBERG, NEVANLINNA, SPEISER, TEICHMร{156}LLER and others obtaining incisive specific results. The main problem of finding necessary and sufficient conditions remains, however, unsolved


I Dirichlet Finite Analytic Functions -- ยง 1. Arbitrary Surfaces -- ยง 2. Plane Regions -- ยง 3. Covering Surfaces of the Sphere -- ยง 4. Covering Surfaces of Riemann Surfaces -- II Other Classes of Analytic Functions -- ยง1. Inclusion Relations -- ยง 2. Plane Regions and Conformal Invariants -- ยง 3. K-Functions -- III Dirichlet Finite Harmonic Functions -- ยง 1. Roydenโ{128}{153}s Compactification -- ยง 2. Dirichletโ{128}{153}s Problem -- ยง 3. Invariance under Deformation -- IV Other Classes of Harmonic Functions -- ยง1. Wienerโ{128}{153}s Compactification -- ยง 2. Dirichletโ{128}{153}s Problem -- ยง 3. Lindelofian Meromorphic Functions -- ยง 4. Invariance under Deformation -- V Functions with Logarithmic Singularities -- ยง1. Capacity Functions -- ยง 2. Parabolic and Hyperbolic Surfaces -- ยง 3. Existence of Kernels -- VI Functions with Iversen$#x2019;s Property -- ยงClasses OAยฐD and OAยฐB -- ยง 2. Boundary Points of Positive Measure -- Appendix. Higher Dimensions -- Author Index -- Subject and Notation Index

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