Semistable Fibrations on Rational Surfaces with at least 6 Singular Fibers
classification
🧮 math.AG
keywords
additionalbeencertaincompletelyconditionscurvesexceptionalfibers
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This paper has been withdrawn. A completely rewritten new version will be soon submitted. In order to obtain the inequality $6(g-1) \le K_f^2$ some additional conditions must be imposed on the fibration, involving the number on certain exceptional curves.
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