In this paper, we give formulas for the Hodge numbers of a nodal complete intersection in a complex projective space. We apply these formulas to construct examples of Calabi–Yau threefolds with [Formula: see text].
In this paper, we give formulas for the Hodge numbers of a nodal complete intersection in a complex projective space. We apply these formulas to construct examples of Calabi–Yau threefolds with [Formula: see text].
We study type III contractions of Calabi–Yau threefolds containing a ruled surface over a smooth curve. We discuss the conditions necessary for the image threefold to be smoothable. We describe the change in Hodge numbers caused by this contraction and smoothing deformation. A generalization of a formula for calculating Hodge numbers of hypersurfaces in [Formula: see text] with ordinary double and triple points is presented. We use these results to construct new Calabi–Yau threefolds of Picard rank two arising from a family of quintic threefolds containing a cone.
We give a formula for the Hodge numbers of a three-dimensional hypersurface in a weighted projective space with only ordinary triple points as singularities.
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