本文利用上、下解方法和不动点定理研究了一类带参数的半线性椭圆型方程边值问题，根据参数的不同情况，分别得出了解的存在性、唯一性和不存在性。%In this paper, the positive solutions of a class of semilinear elliptic equation boundary value problem are studied by using of the sub-supersolution method and fixed point theorem .According to the different situation of parameter variation , we ob-tain the existence, uniqueness and nonexistence respectively.
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