Galactic Dynamic Homework （Problem 2.1 of B&T)

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Chamarel Elna

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TL;DR Summary: Why the topic give the condition "limρr^5/2=0“？What is the usefulness of this condition？ Thanks!

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Frabjous

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You are trying to prevent infinities from popping up in the PE. This is more strict than trying to prevent infinities from popping up in the mass.