Root systems and Jacobi forms
Semicontinuity for representations of one-dimensional Cohen-Macaulay rings.
Semicontinuity of L-Dimension.
Semiregularity, obstructions and deformations of Hodge classes
Seshadri positive submanifolds of polarized manifolds
Let Y be a submanifold of dimension y of a polarized complex manifold (X, A) of dimension k ≥ 2, with 1 ≤ y ≤ k−1. We define and study two positivity conditions on Y in (X, A), called Seshadri A-bigness and (a stronger one) Seshadri A-ampleness. In this way we get a natural generalization of the theory initiated by Paoletti in [Paoletti R., Seshadri positive curves in a smooth projective 3-fold, Atti Accad. Naz. Lincei Cl. Sci. Fis. Mat. Natur. Rend. Lincei (9) Mat. Appl., 1996, 6(4), 259–274] (which...
Simultaneous Resolution of Threefold Double Points.
Singularités rationelles et déformations.
Some remarks concerning rank 2 bundles and Chow groups.
Spitzen, Doppelpunkte und vertikale Tangenten in der Diskriminante verseller Deformationen von vollständigen Durchschnitten.
Stability of Irrational Ruled Threefolds.
Stratifizierung im Hilbertschema. I. Raumkurven mit Singularitäten.
The Atiyah extension of a Lie algebra deformation.
The Behaviour of the Plurigenera of Surfaces Under Algebraic Smooth Deformations.
The concept of (ν)-equivalence in algebraic deformation theory
The cylinder homomorphism associated to quintic fourfolds
The deformation theory of representations of fundamental groups of compact Kähler manifolds
The maximal rank conjecture for non-special curves in IP3.
The Moduli Spaces of Vector Bundles over an Algebraic Curve.
The stability of certain classes of uni-ruled varieties
The trivial locus of an analytic map germ
We prove: For a local analytic family of analytic space germs there is a largest subspace in such that the family is trivial over . Moreover the reduction of equals the germ of those points in for which is isomorphic to the special fibre .