The minimal q - process for a stable extended birth - death q - matrix 稳定性逆定理的另一种证明
2.
Proof of theorem ' s inverse theorem 定理的逆定理证明
3.
The direct and inverse theorem of weighted approximation by generalized baskakov operator 算子加权逼近的正逆定理
4.
The study of direct and inverse theorems on the approximation of linear operators to functions in normed linear spaces is an important subject in the approximation theory . it is significant in theory and application 线性算子对赋范线性空间中函数逼近正逆定理的研究是逼近论中重要的研究课题之一，在理论和实际应用上都具有重要的意义。
5.
In the first part , the simultaneous approximation of this kind of operators is studied ; in the second part the approximation in c [ 0 , ) of their linear combination is discussed . absorbing the method of paper [ 20 ] , the inverse theorem of a new kind of linear combination operators is obtained in the third part 第一节研究这类算子的同时逼近；第二节讨论该算子线性组合在c _ [ 0 ， )上的逼近；第三节吸收[ 20 ]的思想，得到了该算子线性组合逼近的逆定理；第四节讨论该线性组合算子在c _ [ 0 ， )逼近的饱和定理。
