Apparently, this user prefers to keep an air of mystery about them.
12 Special Hamiltonian diffeomorphisms Oct 4 '10
9 Piecewise constant functions with zero average Dec 2 '11
5 Local homology of degenerate critical points Oct 5 '10
4 When is the time evolution of a Hamiltonian system described by the geodesic flow on a Riemannian manifold? Oct 2 '10