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\u5982\u679c\u4e00\u4e2a\u51fd\u6570\u6ee1\u8db3<\/p>\n

f(f(x)) = f(x)<\/code><\/p>\n

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\u6709\u4e00\u4e2a\u5173\u4e8e\u5de5\u4f5c\u7ecf\u9a8c\u7684\u8001\u7b11\u8bdd\u3002\u4e00\u4e2a\u4eba\u8bf4\u81ea\u5df1\u6709\u4e8c\u5341\u5e74\u5de5\u4f5c\u7ecf\u9a8c\uff0c\u5bf9\u65b9\u5374\u8bf4\uff0c\u4f60\u672a\u5fc5\u6709\u4e8c\u5341\u5e74\u7ecf\u9a8c\uff0c\u4e5f\u53ef\u80fd\u53ea\u662f\u4e00\u5e74\u7684\u7ecf\u9a8c\u91cd\u590d\u4e86\u4e8c\u5341\u6b21\u3002<\/p>\n

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x_{n+1} = f(x_n)<\/code><\/p>\n

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