Calabi-Yau-threefolds with Picard number $\rho (X)=2$ and their Kaehler cone II

Marco Kuehnel

We prove the rationality of the Kähler cone and the positivity of $c_2(X)$, if $X$ is a Calabi-Yau-threefold with $\rho (X)=2$ and has an embedding into a ${\bb P}^n$-bundle over ${\bb…