Old and New on S1(2).
On closedness and simple connectedness of adjoint and coadjoint orbits.
On Lie algebra decompositions, related to spherical homogeneous spaces.
On Lie algebroid actions and morphisms
On minimal parabolic subgroups of exponential Lie groups.
On Ol'shanskii's semigroup.
On semigroups generated by left-invariant positive differential operators on nilpotent Lie groups
On some cohomological properties of the Lie algebra of Euclidean motions
The external derivative on differential manifolds inspires graded operators on complexes of spaces , , stated by dual to a Lie algebra . Cohomological properties of these operators are studied in the case of the Lie algebra of the Lie group of Euclidean motions.
On the basic algebraic operations in solvable Lie groups.
On the causal structure of Lorentzian Lie groups. A globality theorem for Lorentzian cones in certain solvable Lie algebras.
On the equivalence of control systems on Lie groups
We consider state space equivalence and feedback equivalence in the context of (full-rank) left-invariant control systems on Lie groups. We prove that two systems are state space equivalent (resp.~detached feedback equivalent) if and only if there exists a Lie group isomorphism relating their parametrization maps (resp. traces). Local analogues of these results, in terms of Lie algebra isomorphisms, are also found. Three illustrative examples are provided.