Resumen de Primitive contractions of Calabi�Yau threefolds II

Grzegorz Kapustka

• We construct several new examples of Calabi�Yau threefolds with Picard group of rank 1. Each of these examples is obtained by smoothing the image of a primitive contraction with exceptional divisor being a del Pezzo surface of degree 4, 5, 6, or 7, or 1x1.