Threefolds of degree 9 and 10 in P5.
Threefolds of non negative Kodaira dimension with sectional genus less than or equal to 15
Threefolds with big and nef anticanonical bundles II
In a follow-up to our paper [Threefolds with big and nef anticanonical bundles I, Math. Ann., 2005, 333(3), 569–631], we classify smooth complex projective threefolds Xwith −K X big and nef but not ample, Picard number γ(X) = 2, and whose anticanonical map is small. We assume also that the Mori contraction of X and of its flop X + are not both birational.
Threefolds with nef anticanonical bundles.
In this paper we study the global structure of projective threefolds X whose anticanonical bundle -KX is nef.
Tie transformations of Dynkin graphs and singularities on quartic surfaces.
Tilting Bundles on Rational Surfaces and Quasi-Hereditary Algebras
Let be any rational surface. We construct a tilting bundle on . Moreover, we can choose in such way that its endomorphism algebra is quasi-hereditary. In particular, the bounded derived category of coherent sheaves on is equivalent to the bounded derived category of finitely generated modules over a finite dimensional quasi-hereditary algebra . The construction starts with a full exceptional sequence of line bundles on and uses universal extensions. If is any smooth projective variety...
Topological Order Complexes and Resolutions of Discriminant Sets
Topological order complexes and resolutions of discriminant sets.
Topologische Typen reeller kubischer Flächen.
Topology of real algebraic T-surfaces.
The paper is devoted to algebraic surfaces which can be obtained using a simple combinatorial procedure called the T-construction. The class of T-surfaces is sufficiently rich: for example, we construct T-surfaces of an arbitrary degree in RP³ which are M-surfaces. We also present a construction of T-surfaces in RP³ with dim H1 (RX; Z/2) > h1, 1(CX), where RX and CX are the real and the complex point sets of the surface.
Torelli theorem for surfaces with and ample and with certain type of automorphism
Torelli theorems for Kähler K3 surfaces
Torsion groups of elliptic surfaces
Torsion in Milnor fiber homology.
Toward Clemens' Conjecture in Degrees between 10 and 24
1 Supported in part by the Norwegian Research Council for Science and the Humanities. It is a pleasure for this author to thank the Department of Mathematics of the University of Sofia for organizing the remarkable conference in Zlatograd during the period August 28-September 2, 1995. It is also a pleasure to thank the M.I.T. Department of Mathematics for its hospitality from January 1 to July 31, 1993, when this work was started. 2Supported in part by NSF grant 9400918-DMS.We introduce and study...
Toward moduli of singular varieties
Transformation der hyperelliptischen Functionen p = 2 und ihre Bedeutung für die Kummer'sche Fläche
Transformée de Fourier et stabilité sur les surfaces abéliennes
Translation manifolds and the converse of Abel's theorem
Trigonal Hyperplane Sections of Projective Surfaces.