On Finite Morphisms of Rational Ruled Su
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Yuko Homma
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Article
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2006
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John Wiley and Sons
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English
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Ruled surfaces have been studied by NAGATA IS], MARUYAMA [3, 41 and other authors from the point of view of classification. Especially on rational ruled surfaces we have known many facts, for example, an explicit condition for a divisor D to be ample, that for ID( to have an irreducible member and s