On invariants of a set of matrices.
On Projections in the Symmetric Power Space.
On projective equivalence of univariate polynomial subspaces.
On relations of invariants for vector-valued forms.
On the geometry of conjugacy classes in classical groupes.
On the Nonflatness of Analytic Tensor Product.
On the special trace decomposition problem on quaternion structure.
On the subspace of .
On the symmetry classes of the first covariant derivatives of tensor fields.
Partial Derivations and B. Iversen's Linear Determinants.
Particular trace decompositions and applications of trace decomposition to almost projective invariants
First, by using the formulae of Krupka, the trace decomposition for some particular classes of tensors of types (1, 2) and (1, 3) is obtained. Second, it is proved that the traceless part of a tensor is an almost projective invariant of weight 1. We apply this result to Weyl curvature tensors.
Produit tensoriel topologique des corps values.
Projections of tensor spaces
Quelques résultats de finitude en théorie des invariants
Representations of a reductive algebraic group whose algebras of invariants are complete intersections.
Representations of Simple Lie Groups with a Free Module of Covariants.
Representations of Simple Lie Groups with Regular Rings of Invariants.
Resultanten von Covarianten
SO(2) invariants of a set of 2 x 2 matrices.
Stabilizers for nondegenerate matrices of boundary format and Steiner bundles.
In this paper nondegenerate multidimensional matrices of boundary format in V0 ⊗ ... ⊗ Vp are investigated by their link with Steiner vector bundles on product of projective spaces. For any nondegenerate matrix A the stabilizer for the SL(V0) x ... x SL(Vp)-action, Stab(A), is completely described. In particular we prove that there exists an explicit action of SL(2) on V0 ⊗ ... ⊗ Vp such that Stab(A)0 ⊆ SL(2) and the equality holds if and only if A belongs to a unique SL(V0) x ... x SL(Vp)-orbit...