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Analytic gravitational collapse and expansion solutions with anisotropicpressure are generated. Metric functions are found by requiring zero heat flowscalar. It emerges that a single function generates the anisotropic solutions.Each generating function contains an arbitrary function of time which can bechosen to fit various astrophysical time profiles. Two examples are provided: abounded collapse metric and an expanding cosmological solution

Generating Anisotropic Collapse and Expansion Solutions of Einstein's Equations