Answers are grounded in this paper and cite their sources.
A variational principle of great power is derived. It is naturally adapted for computers, and may be used to determine the stability of any fluid flow including those in differentially-rotating, self-gravitating stars and galaxies. The method also provides a powerful theoretical tool for studying general properties of eigen-functions, and the relationships between secular and ordinary stability. In particular we prove the anti-spiral theorem indicating that no stable (or steady) mode can have a spiral structure.
No takes yet. Share an insight, caveat, or question.
Lynden–Bell et al. (1967) studied this question.
Synapse has enriched 10 related papers. Consider them for comparative context: