| 摘 要： | Chaos is universal phenomenon in the nature. Some scientists think that chaos theory is the third revolution in physics of this century, following relativity theory and quantum mechanics. The δSct type stars are pulsating variable stars with light amplitudes in Ⅴ from 0~m.003to 0~m.9 and periods from 0~d.01 to 0~d.2. The spectral types are A0-F5Ⅲ-Ⅴ. Some stars such as ρ Puppis and AD CMi show light curves which repeat beautifully from cycle to cycle.The light curves of many stars, especially the small-amplitude variables, often appear vari-
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