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Bücher von Takeo Ohsawa

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  • - Proceedings of the 25th Taniguchi International Symposium held in Katata, and the Conference held in Kyoto, July 31 - August 9, 1989
    von Junjiro Noguchi
    45,00 €

    In the Teichmuller theory of Riemann surfaces, besides the classical theory of quasi-conformal mappings, vari- ous approaches from differential geometry and algebraic geometry have merged in recent years. Thus the central subject of "e;Complex Structure"e; was a timely choice for the joint meetings in Katata and Kyoto in 1989. The invited participants exchanged ideas on different approaches to related topics in complex geometry and mapped out the prospects for the next few years of research.

  • - Towards the Oka-Cartan Theory with Precise Bounds
    von Takeo Ohsawa
    113,00 €

    This monograph presents the current status of a rapidly developing part of several complex variables, motivated by the applicability of effective results to algebraic geometry and differential geometry. Special emphasis is put on the new precise results on the L² extension of holomorphic functions in the past 5 years.In Chapter 1, the classical questions of several complex variables motivating the development of this field are reviewed after necessary preparations from the basic notions of those variables and of complex manifolds such as holomorphic functions, pseudoconvexity, differential forms, and cohomology. In Chapter 2, the L² method of solving the d-bar equation is presented emphasizing its differential geometric aspect. In Chapter 3, a refinement of the OkäCartan theory is given by this method. The L² extension theorem with an optimal constant is included, obtained recently by Z. B¿ocki and separately by Q.-A. Guan and X.-Y. Zhou. In Chapter 4, various results on the Bergman kernel are presented, including recent works of Maitani¿Yamaguchi, Berndtsson, Guan¿Zhou, and Berndtsson¿Lempert. Most of these results are obtained by the L² method. In the last chapter, rather specific results are discussed on the existence and classification of certain holomorphic foliations and Levi flat hypersurfaces as their stables sets. These are also applications of the L² method obtained during the past 15 years.

  • - Development of Oka-Cartan Theory by L(2) Estimates for the d-bar Operator
    von Takeo Ohsawa
    68,00 €

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