Abstract
In an ingenious way rotation (but no angular momentum) has been introduced in the case of spherical symmetry by Einstein, who has considered a stationary cluster of particles moving freely under the influence of the gravitational field produced by all of them together. The aim of the present work is to extend his idea to the non-static case, and it seems that under some circumstances instead of an indefinite gravitational collapse there is a minimum of the volume and a bouncing back.
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Kumar Datta, B. Non-static spherically symmetric clusters of particles in general relativity: I. Gen Relat Gravit 1, 19–25 (1970). https://doi.org/10.1007/BF00759199
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DOI: https://doi.org/10.1007/BF00759199