Abstract
We establish obstructions for groups to act by homeomorphisms on dendrites. For instance, lattices in higher rank simple Lie groups will always fix a point or a pair. The same holds for irreducible lattices in products of connected groups. Further results include a Tits alternative and a description of the topological dynamics.
We briefly discuss to what extent our results hold for more general topological curves.
We briefly discuss to what extent our results hold for more general topological curves.