在第二个问题中，我们给出了在离散的情形下，指数族势函数严凸的充分必要条件。

In the second we give the necessary and sufficient conditions for strict convexity of power function of exponential family in the discrete case.

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在第二节中，我们研究了树映射的渐近稳定集，得到了不动点为渐近稳定的两个充分必要条件。

In section 2, asymptotically stable sets of tree maps are studied, and two necessary and sufficient conditions for a fixed point to be asymptotically stable are obtained.

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在第二节中，我们研究了树映射的渐近稳定集，得到了不动点为渐近稳定的两个充分必要条件。

In section 2, asymptotically stable sets of tree maps are studied, and two necessary and sufficient conditions for a fixed point to be asymptotically stable are obtained.

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