Induced modules for affine Lie algebras.
Infinite dimensional Lie algebras: representations and applications
Infinite Root Systems, Representations of Graphs and Invariant Theory.
Infinite-dimensional hyperkähler manifolds associated with Hermitian-symmetric affine coadjoint orbits
In this paper, we construct a hyperkähler structure on the complexification of any Hermitian symmetric affine coadjoint orbit of a semi-simple -group of compact type, which is compatible with the complex symplectic form of Kirillov-Kostant-Souriau and restricts to the Kähler structure of . By a relevant identification of the complex orbit with the cotangent space of induced by Mostow’s decomposition theorem, this leads to the existence of a hyperkähler structure on compatible with...
Infinite-dimensional Lie groups and algebras in mathematical physics.
Invariant cohomology of the Poisson Lie algebra of a symplectic manifold
Invariant theory and the algebra with negative integral central charge
The vertex algebra with central charge may be defined as a module over the universal central extension of the Lie algebra of differential operators on the circle. For an integer , it was conjectured in the physics literature that should have a minimal strong generating set consisting of elements. Using a free field realization of due to Kac–Radul, together with a deformed version of Weyl’s first and second fundamental theorems of invariant theory for the standard representation of ,...
Invariant Theory for Generalized Root Systems.
Isomorphisms of Lie algebras of vector fields