Ezio Stagnaro
(2007)
Using the theory of adjoints and pluricanonical adjoints, we construct three nonsingular threefolds, as desingularizations of degree six hypersurfaces in , having the irregularities and the following periodical sequences of plurigenera respectively In the Appendix, starting from the second above-mentioned example, we construct a threefold of general type with , whose m-canonical transformation is birational if and only if .