Given the matrix normal model where ∑>0 and V>0 are known, it is showed that S1YS2 is admissible for S1 S2 in the class of all estimators under each of six definitions for admissibility.
对于矩阵正态模型Ｙｎｘｍ～Ｎ其中０和Ｖ≥０已知，本文征明了，在６种不同的可容许性定义下，Ｓ１ＹＳ２在一切估计类中是Ｓ１Ｓ２的可容许估计。
It has proved the theory that fuzzy matrix A is a λ-cut invertible fuzzy matrix if and only if A is a orthogonal fuzzy matrix, and obtain a method of all λ-cut inverse fuzzy matrix to solute λ-cut invertible fuzzy matrix.
提出了λ截可逆模糊矩阵的概念，讨论了λ截可逆模糊矩阵的性质，证明了模糊矩阵A是λ截可逆模糊矩阵的充分必要条件为A是正交模糊矩阵，给出了求λ截可逆模糊矩阵A的全部λ截逆模糊矩阵的方法。