By using a well-known fixed point index theorem, we obtain the existence, multiplicity and nonexistence of positive periodic solution(s) to this equation.
利用一个著名的不动点指标定理，获得了该方程周期正解的存在性、多重性和不存在性。
The system of index, multiplicity of weight and method of assessment for the practice achievement.
实习成绩评定的指标体系、权重分配和方法。
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