  The Arnold conjecture states that a Hamiltonian diffeomorphism of a closed
and connected symplectic manifold must have at least as many fixed points as
the minimal number of critical points of a smooth function on the manifold.
  It is well known that the Arnold conjecture holds for Hamiltonian
homeomorphisms of closed symplectic surfaces. The goal of this paper is to
provide a counterexample to the Arnold conjecture for Hamiltonian
homeomorphisms in dimensions four and higher.
  More precisely, we prove that every closed and connected symplectic manifold
of dimension at least four admits a Hamiltonian homeomorphism with a single
fixed point.
