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

Marco Kuehnel

We describe properties of the Kähler cone of general Calabi-Yau-threefolds with Picard number $\rho (X)=2$ and prove the rationality of the Kähler cone, if $X$ is a Calabi-Yau-hypersur…