Regularization of Kepler Problem in $\kappa$-spacetime
  In this paper we regularize the Kepler problem on $\kappa$-spacetime in several different ways. First, we perform a Moser-type regularization and then we proceed for the Ligon-Schaaf regularization to our problem. In particular, generalizing Heckman-de Laat (J. Symplectic Geom. 10, (2012), 463-473) in the noncommutative context we show that the Ligon-Schaaf regularization map follows from an adaptation of the Moser regularization can be generalized to the Kepler problem on $\kappa$-spacetime. 
Partha Guha, E. Harikumar and Zuhair N.S
math-ph gr-qc hep-th math.MP