Ideal decompositions and computation of tensor normal forms.
Infinite Root Systems, Representations of Graphs and Invariant Theory.
Integrity basis for a second-order and a fourth-order tensor.
Invariant ideals of polynomial algebras with multiplicity free group action
Invariants de plusieurs formes binaires
Invariants of four subspaces
We consider problems in invariant theory related to the classification of four vector subspaces of an -dimensional complex vector space. We use castling techniques to quickly recover results of Howe and Huang on invariants. We further obtain information about principal isotropy groups, equidimensionality and the modules of covariants.
Irreducible linear group-subgroup pairs with the same invariants.