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Title
Japanese: 
English:Geometry of some twistor spaces of algebraic dimension one 
Author
Japanese: 本多宣博.  
English: Nobuhiro Honda.  
Language English 
Journal/Book name
Japanese: 
English:Complex Manifolds 
Volume, Number, Page Volume 2    No. 1    pp. 105-130
Published date Sept. 9, 2015 
Publisher
Japanese: 
English:De Gruyter 
Conference name
Japanese: 
English: 
Conference site
Japanese: 
English: 
Official URL http://www.degruyter.com/view/j/coma.2015.2.issue-1/issue-files/coma.2015.2.issue-1.xml
 
DOI https://doi.org/10.1515/coma-2015-0009
Abstract It is shown that there exists a twistor space on the n-fold connected sum of complex projective planes nCP2, whose algebraic dimension is one and whose general ber of the algebraic reduction is birational to an elliptic ruled surface or a K3 surface. The former kind of twistor spaces are constructed over nCP2 for any n ≥ 5, while the latter kind of example is constructed over 5CP2. Both of these seem to be the rst such example on nCP2. The algebraic reduction in these examples is induced by the anti-canonical system of the twistor spaces. It is also shown that the former kind of twistor spaces contain a pair of non-normal Hopf surfaces.

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