astro-ph/0406142

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Table of Contents

• INTRODUCTION
• LINDBLAD'S ERA
• From unstable orbits to global wave modes
• Gas and dust
• Winds of change
• Dispersion orbits
• Circulation theory of quasi-stationary spirals
• ON A NEW WAVE CREST
• Regenerative spirals by Lynden-Bell
• MIT enthusiasm
• Gravitational stability of flat systems
• Kalnajs' search for spiral modes
• THE LIN-SHU THEORY
• Working hypothesis and semi-empirical theory
• A definitive (?) new prediction
• AFTERWORD
• REFERENCES