I am a Mathematician working at TU Berlin. I have a general interest in mathematics, but my own reasearch is mostly in

• graph theory, especially geometric, topological, algebraic and spectral,
• polytope theory, especially realizations, rigidity and symmetries,
• low-dimensional topology,
• rigidity theory and geometric constraint systems
• reflection groups, root systems, Coxeter groups, Lie groups, lattices and other exceptional structures,
• everything related to symmetries of discrete and geometric objects,

See here for my personal website.