Immersione canonica e mappa dei periodi. Il caso dei gruppi di Barsotti-Tate étale e moltiplicativi
Immersions of module varieties
We show that a homomorphism of algebras is a categorical epimorphism if and only if all induced morphisms of the associated module varieties are immersions. This enables us to classify all minimal singularities in the subvarieties of modules from homogeneous standard tubes.
Imprimitive Maximal Subgroups of the Orthogonal, Special Orthogonal, Unitary and Special Unitary Groups.
Induced Modules and Extensions of Representations.
Inequalities defining orbit spaces.
Infinite Root Systems, Representations of Graphs and Invariant Theory.
Infinitesimal unipotent group schemes of complexity 1
We classify the uniserial infinitesimal unipotent commutative groups of finite representation type over algebraically closed fields. As an application we provide detailed information on the structure of those infinitesimal groups whose distribution algebras have a representation-finite principal block.
Introduction to actions of algebraic groups
These notes present some fundamental results and examples in the theory of algebraic group actions, with special attention to the topics of geometric invariant theory and of spherical varieties. Their goal is to provide a self-contained introduction to more advanced lectures.
Invariant Analytic Hypersurfaces.
Invariant differential operators and Frobenius decomposition of a -variety. (Invariante Differentialoperatoren und die Frobenius-Zerlegung einer -Varietät.)
Invariant differential operators on symplectic Grassmann manifolds.
Invariant differential operators on the tangent space of some symmetric spaces
Let be a complex, semisimple Lie algebra, with an involutive automorphism and set , . We consider the differential operators, , on that are invariant under the action of the adjoint group of . Write for the differential of this action. Then we prove, for the class of symmetric pairs considered by Sekiguchi, that . An immediate consequence of this equality is the following result of Sekiguchi: Let be a real form of one of these symmetric pairs , and suppose that is a -invariant...
Invariant differentials and -functions. Reciprocity law for quadratic fields and elliptic curves over
Invariant meromorphic functions on Stein spaces
In this paper we develop fundamental tools and methods to study meromorphic functions in an equivariant setup. As our main result we construct quotients of Rosenlicht-type for Stein spaces acted upon holomorphically by complex-reductive Lie groups and their algebraic subgroups. In particular, we show that in this setup invariant meromorphic functions separate orbits in general position. Applications to almost homogeneous spaces and principal orbit types are given. Furthermore, we use the main result...
Invariant subrings of ... [X, Y, Z] which are complete intersections.
Invariant subspaces for grasping internal forces and non-interacting force-motion control in robotic manipulation
This paper presents a parametrization of a feed-forward control based on structures of subspaces for a non-interacting regulation. With advances in technological development, robotics is increasingly being used in many industrial sectors, including medical applications (e. g., micro-manipulation of internal tissues or laparoscopy). Typical problems in robotics and general mechanisms may be mathematically formalized and analyzed, resulting in outcomes so general that it is possible to speak of structural...
Invariant theory for linear algebraic groups II (char k arbitrary)
Invariant theory for and the rationality of
Invariant theory of G2 and Spin7.
Invariante Differentiale bei der Operation einer endlichen zyklischen Gruppe.