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Schlagwörter:
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Zusammenfassung:
A generalized Bohr-Sommerfeld-type formula determining the quasinormal-mode frequencies of Schwarzschild black holes is derived using the phase-integral method with three transition points. The formula is valid provided that these points are well separated from each other, and is remarkably accurate for the high-overtone modes. It makes a great improvement over the conventional Bohr-Sommerfeld formula, derived from two transition points.