The infimum and supremum of operators, and generalized inverse of operators are heated topics in operator theory and also have important value in both theory and application.
算子的确界性质和广义逆是近年来算子理论中比较活跃的一些研究课题，在算子理论的研究中有着重要的理论价值和应用价值。
The matrix expression of the pseudo-inverse operator concerning the pre-frame operator was provided, and finally the theory of pseudo-inverse operators to some non-frame sequences was developed.
然后把伪逆算子应用在框架理论中，同时给出了预框架算子的伪逆算子的矩阵表示。
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