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Published online by Cambridge University Press: 20 November 2018
Let $(X,L)$ be a polarized manifold over the complex number field with dim
$X=n$. In this paper, we consider a conjecture of M. C. Beltrametti and A. J. Sommese and we obtain that this conjecture is true if
$n=3$ and
${{h}^{0}}\,(L)\,\ge \,2$, or
$\dim\,\text{Bs}|L|\le 0$ for any
$n\ge 3$. Moreover we can generalize the result of Sommese.
The author is a Research Fellow of the Japan Society for the Promotion of Science.