Hyperspherical 4 Sturmian 4 Three-body wave functions 4 Wave functions 4 Asymptotic limits 2 Basis sets 2 Collision problem 2 Collision process 2 Dinger equation 2 Discrete functions 2 Discretization scheme 2 Double ionization 2 Fragmentation process 2 High-energy electron 2 Hyperspherical coordinates 2 Impact ionization 2 Nonhomogeneous equations 2 Scattered waves 2 Scheduling 2 Standard matrix method 2 Three body 2 Three-body interaction 2 Transition amplitudes 2