Threefold Extremal Contractions of Type (IIA)

Let (X, C) be a germ of a threefold X with terminal singularities along an irreducible reduced complete curve C with a contraction f:(X,C)→(Z,o) such that C=f−1(o)red and −K X is f-ample. Assume that (X, C) contains a point of type (IIA). This chapter continues the study of such germs containing a point of type (IIA), started in our previous paper.