The final fate of spherical inhomogeneous dust collapse: II. Initial data and causal structure of the singularity

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Abstract
Further to results given by Singh and Joshi, pointing out the role of initial density and velocity distributions towards determining the final outcome of spherical dust collapse, the causal structure of a singularity is examined here in terms of evolution of the apparent horizon. We also bring out several related features which help towards understanding the nature of this singularity, including the behaviour of geodesic families and some aspects related to the stability of the singularity.